P0171 P0171, P0174 FUEL INJECTION SYSTEM FUNCTION

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P0171
P0171, P0174 FUEL INJECTION SYSTEM FUNCTION
On Board Diagnosis Logic
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on
the mixture ratio feedback signal from the A/F sensors 1. The ECM calculates the necessary compensation to correct the offset between the actual
and the theoretical ratios.
In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the
ECM judges the condition as the fuel injection system malfunction and lights up the MIL (2 trip detection logic).
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 153
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
WITH CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON and select "SELF-LEARNING CONT" in "WORK SUPPORT" mode with CONSULT-III.
6. Clear the self-learning control coefficient by touching "CLEAR".
7. Start engine.
If it is difficult to start engine, the fuel injection system has a malfunction.
Performing the following procedure is advised.
a. Crank engine while depressing accelerator pedal.
NOTE:
When depressing accelerator pedal three-fourths (3/4) or more, the control system does not start the engine. Do not depress accelerator pedal too
much.
b. If engine starts, go to See: P0171.
If engine does not start, check exhaust and intake air leakage visually.
8. Keep engine at idle for least 5 minutes.
9. Check 1st trip DTC.
10. The 1st trip DTC P0171 or P0174 should be detected at this stage, if a malfunction exists. If so, go to See: P0171.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine.
c. Maintain the following conditions for at least 10 consecutive minutes.
Hold the accelerator pedal as steady as possible.
CAUTION:
Always drive vehicle at a safe speed.
d. Check 1st trip DTC.
e. If 1st trip DTC is detected, go to See: P0171.
WITH GST
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 154
5. Disconnect mass air flow sensor harness connector.
6. Restart engine and let it idle for at least 5 seconds.
7. Stop engine and reconnect mass air flow sensor harness connector.
8. Select Service $03 with GST. Make sure DTC P0102 is detected.
9. Select Service $04 with GST and erase the DTC P0102.
10. Start engine.
If it is difficult to start engine, the fuel injection system has a malfunction.
Performing the following procedure is advised.
a. Crank engine while depressing accelerator pedal.
NOTE:
When depressing accelerator pedal three-fourths (3/4) or more, the control system does not start the engine. Do not depress accelerator pedal too
much.
b. If engine starts, go to See: P0171.
If engine does not start, check exhaust and intake air leakage visually.
11. Keep engine at idle for at least 5 minutes.
12. Check 1st trip DTC.
13. The 1st trip DTC P0171 or P0174 should be detected at this stage, if a malfunction exists. If so, go to See: P0171.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine.
c. Maintain the following conditions for at least 10 consecutive minutes.
Hold the accelerator pedal as steady as possible.
CAUTION:
Always drive vehicle at a safe speed.
d. Check 1st trip DTC.
e. If 1st trip DTC is detected, go to See: P0171.
Diagnosis Procedure
1.CHECK EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before three way catalyst (manifold).
OK or NG
OK - GO TO 2.
NG - Repair or replace.
2.CHECK FOR INTAKE AIR LEAK
1. Listen for an intake air leak after the mass air flow sensor.
2. Check PCV hose connection.
OK or NG
OK - GO TO 3.
NG - Repair or replace.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 155
3.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect corresponding A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to Wiring Diagram.
Continuity should exist.
5. Check harness continuity between the following terminals and ground. Refer to Wiring Diagram.
Continuity should not exist.
6. Also check harness for short to power.
OK or NG
OK - GO TO 4.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK FUEL PRESSURE
1. Release fuel pressure to zero. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.
2. Install fuel pressure gauge kit [SST (J-44321)] and check fuel pressure. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine
Performance Checks/Fuel Pressure/Testing and Inspection.
At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)
OK or NG
OK - GO TO 6.
NG - GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
- Fuel pump and circuit ( See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Pump.)
- [Flexible Fuel Vehicle]
FPCM and circuit ( See: P1220.)
- Fuel pressure regulator ( See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.)
- Fuel lines
- Fuel filter for clogging
- Repair or replace.
6.CHECK MASS AIR FLOW SENSOR
With CONSULT-III
1. Install all removed parts.
2. Check "MASS AIR FLOW" in "DATA MONITOR" mode with CONSULT-III.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 156
With GST
1. Install all removed parts.
2. Check mass air flow sensor signal in Service $01 with GST.
OK or NG
OK - GO TO 7.
NG - Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or grounds. See: P0101.
7.CHECK FUNCTION OF FUEL INJECTOR
With CONSULT-III
1. Start engine.
2. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-III.
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-III
1. Start engine.
2. Listen to each fuel injector operating sound.
Clicking noise should be heard.
OK or NG
OK - GO TO 8.
NG - Perform trouble diagnosis for FUEL INJECTOR, See: Powertrain Management/Fuel Delivery and Air Induction/Description and
Operation/Fuel Injector See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Injector/Diagnosis Procedure.
8.CHECK FUEL INJECTOR
1. Confirm that the engine is cooled down and there are no fire hazards near the vehicle.
2. Turn ignition switch OFF.
3. Disconnect all fuel injector harness connectors.
4. Remove fuel injector gallery assembly. See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Rail/Service and Repair/Removal
And Installation.
Keep fuel hose and all fuel injectors connected to fuel injector gallery.
5. For DTC P0171, reconnect fuel injector harness connectors on bank 1.
For DTC P0174, reconnect fuel injector harness connectors on bank 2.
6. Disconnect all ignition coil harness connectors.
7. Prepare pans or saucers under each fuel injector.
8. Crank engine for about 3 seconds.
For DTC P0171, make sure that fuel sprays out from fuel injectors on bank 1.
For DTC P0174, make sure that fuel sprays out from fuel injectors on bank 2.
Fuel should be sprayed evenly for each fuel injector.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 157
OK or NG
OK - GO TO 9.
NG - Replace fuel injectors from which fuel does not spray out. Always replace O-ring with new ones.
9.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0172
P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
On Board Diagnosis Logic
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on
the mixture ratio feedback signal from the A/F sensors 1. The ECM calculates the necessary compensation to correct the offset between the actual
and the theoretical ratios.
In case the amount of the compensation value is extremely large (The actual mixture ratio is too rich.), the
ECM judges the condition as the fuel injection system malfunction and lights up the MIL (2 trip detection logic).
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
WITH CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON and select "SELF-LEARNING CONT" in "WORK SUPPORT" mode with CONSULT-III.
6. Clear the self-learning control coefficient by touching "CLEAR".
7. Start engine.
If it is difficult to start engine, the fuel injection system has a malfunction.
Performing the following procedure is advised.
a. Crank engine while depressing accelerator pedal.
NOTE:
When depressing accelerator pedal three-fourths (3/4) or more, the control system does not start the engine. Do not depress accelerator pedal too
much.
b. If engine starts, go to See: P0172.
If engine does not start, check exhaust and intake air leakage visually.
8. Keep engine at idle for least 5 minutes.
9. Check 1st trip DTC.
10. The 1st trip DTC P0172 or P0175 should be detected at this stage, if a malfunction exists. If so, go to See: P0172.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine.
c. Maintain the following conditions for at least 10 consecutive minutes.
Hold the accelerator pedal as steady as possible.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 158
CAUTION:
Always drive vehicle at a safe speed.
d. Check 1st trip DTC.
e. If 1st trip DTC is detected, go to See: P0172.
WITH GST
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Disconnect mass air flow sensor harness connector.
6. Restart engine and let it idle for at least 5 seconds.
7. Stop engine and reconnect mass air flow sensor harness connector.
8. Select Service $03 with GST. Make sure DTC P0102 is detected.
9. Select Service $04 with GST and erase the DTC P0102.
10. Start engine.
If it is difficult to start engine, the fuel injection system has a malfunction.
Performing the following procedure is advised.
a. Crank engine while depressing accelerator pedal.
NOTE:
When depressing accelerator pedal three-fourths (3/4) or more, the control system does not start the engine. Do not depress accelerator pedal too
much.
b. If engine starts, go to See: P0172.
If engine does not start, check exhaust and intake air leakage visually.
11. Keep engine at idle for at least 5 minutes.
12. Check 1st trip DTC.
13. The 1st trip DTC P0172 or P0175 should be detected at this stage, if a malfunction exists. If so, go to See: P0172.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine.
c. Maintain the following conditions for at least 10 consecutive minutes.
Hold the accelerator pedal as steady as possible.
CAUTION:
Always drive vehicle at a safe speed.
d. Check 1st trip DTC.
e. If 1st trip DTC is detected, go to See: P0172.
Diagnosis Procedure
1.CHECK EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before three way catalyst (manifold).
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 159
OK or NG
OK - GO TO 2.
NG - Repair or replace.
2.CHECK FOR INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK - GO TO 3.
NG - Repair or replace.
3.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect corresponding A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to Wiring Diagram.
Continuity should exist.
5. Check harness continuity between the following terminals and ground. Refer to Wiring Diagram.
Continuity should not exist.
6. Also check harness for short to power.
OK or NG
OK - GO TO 4.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK FUEL PRESSURE
1. Release fuel pressure to zero. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.
2. Install fuel pressure gauge and check fuel pressure. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel
Pressure/Testing and Inspection.
At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)
OK or NG
OK - GO TO 6.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 160
NG - GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
- Fuel pump and circuit ( See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Pump See: Powertrain
Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Pump.)
- [Flexible Fuel Vehicle]
FPCM and circuit ( See: P1220 See: P1220 See: P1220.)
- Fuel pressure regulator ( See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.)
- Repair or replace.
6.CHECK MASS AIR FLOW SENSOR
With CONSULT-III
1. Install all removed parts.
2. Check "MASS AIR FLOW" in "DATA MONITOR" mode with CONSULT-III.
With GST
1. Install all removed parts.
2. Check mass air flow sensor signal in Service $01 with GST.
OK or NG
OK - GO TO 7.
NG - Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or grounds. See: P0101 See: P0101 See:
P0101.
7.CHECK FUNCTION OF FUEL INJECTOR
With CONSULT-III
1. Start engine.
2. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-III.
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-III
1. Start engine.
2. Listen to each fuel injector operating sound.
Clicking noise should be heard.
OK or NG
OK - GO TO 8.
NG - Perform trouble diagnosis for FUEL INJECTOR, See: Powertrain Management/Fuel Delivery and Air Induction/Description and
Operation/Fuel Injector See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Injector/Diagnosis Procedure.
8.CHECK FUEL INJECTOR
1. Remove fuel injector assembly. See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Rail/Service and Repair/Removal And
Installation.
Keep fuel hose and all fuel injectors connected to fuel injector gallery.
2. Confirm that the engine is cooled down and there are no fire hazards near the vehicle.
3. Disconnect all fuel injector harness connectors.
4. Disconnect all ignition coil harness connectors.
5. Prepare pans or saucers under each fuel injectors.
6. Crank engine for about 3 seconds.
Make sure fuel does not drip from fuel injector.
OK or NG
OK (Does not drip.)-GO TO 9.
NG (Drips.)-Replace the fuel injectors from which fuel is dripping. Always replace O-ring with new one.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 161
9.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0174
P0171, P0174 FUEL INJECTION SYSTEM FUNCTION
On Board Diagnosis Logic
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on
the mixture ratio feedback signal from the A/F sensors 1. The ECM calculates the necessary compensation to correct the offset between the actual
and the theoretical ratios.
In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the
ECM judges the condition as the fuel injection system malfunction and lights up the MIL (2 trip detection logic).
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
WITH CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON and select "SELF-LEARNING CONT" in "WORK SUPPORT" mode with CONSULT-III.
6. Clear the self-learning control coefficient by touching "CLEAR".
7. Start engine.
If it is difficult to start engine, the fuel injection system has a malfunction.
Performing the following procedure is advised.
a. Crank engine while depressing accelerator pedal.
NOTE:
When depressing accelerator pedal three-fourths (3/4) or more, the control system does not start the engine. Do not depress accelerator pedal too
much.
b. If engine starts, go to See: P0171.
If engine does not start, check exhaust and intake air leakage visually.
8. Keep engine at idle for least 5 minutes.
9. Check 1st trip DTC.
10. The 1st trip DTC P0171 or P0174 should be detected at this stage, if a malfunction exists. If so, go to See: P0171.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine.
c. Maintain the following conditions for at least 10 consecutive minutes.
Hold the accelerator pedal as steady as possible.
CAUTION:
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 162
Always drive vehicle at a safe speed.
d. Check 1st trip DTC.
e. If 1st trip DTC is detected, go to See: P0171.
WITH GST
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Disconnect mass air flow sensor harness connector.
6. Restart engine and let it idle for at least 5 seconds.
7. Stop engine and reconnect mass air flow sensor harness connector.
8. Select Service $03 with GST. Make sure DTC P0102 is detected.
9. Select Service $04 with GST and erase the DTC P0102.
10. Start engine.
If it is difficult to start engine, the fuel injection system has a malfunction.
Performing the following procedure is advised.
a. Crank engine while depressing accelerator pedal.
NOTE:
When depressing accelerator pedal three-fourths (3/4) or more, the control system does not start the engine. Do not depress accelerator pedal too
much.
b. If engine starts, go to See: P0171.
If engine does not start, check exhaust and intake air leakage visually.
11. Keep engine at idle for at least 5 minutes.
12. Check 1st trip DTC.
13. The 1st trip DTC P0171 or P0174 should be detected at this stage, if a malfunction exists. If so, go to See: P0171.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine.
c. Maintain the following conditions for at least 10 consecutive minutes.
Hold the accelerator pedal as steady as possible.
CAUTION:
Always drive vehicle at a safe speed.
d. Check 1st trip DTC.
e. If 1st trip DTC is detected, go to See: P0171.
Diagnosis Procedure
1.CHECK EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before three way catalyst (manifold).
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 163
OK or NG
OK - GO TO 2.
NG - Repair or replace.
2.CHECK FOR INTAKE AIR LEAK
1. Listen for an intake air leak after the mass air flow sensor.
2. Check PCV hose connection.
OK or NG
OK - GO TO 3.
NG - Repair or replace.
3.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect corresponding A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to Wiring Diagram.
Continuity should exist.
5. Check harness continuity between the following terminals and ground. Refer to Wiring Diagram.
Continuity should not exist.
6. Also check harness for short to power.
OK or NG
OK - GO TO 4.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK FUEL PRESSURE
1. Release fuel pressure to zero. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.
2. Install fuel pressure gauge kit [SST (J-44321)] and check fuel pressure. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine
Performance Checks/Fuel Pressure/Testing and Inspection.
At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)
OK or NG
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 164
OK - GO TO 6.
NG - GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
- Fuel pump and circuit ( See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Pump See: Powertrain
Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Pump.)
- [Flexible Fuel Vehicle]
FPCM and circuit ( See: P1220 See: P1220 See: P1220.)
- Fuel pressure regulator ( See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.)
- Fuel lines
- Fuel filter for clogging
- Repair or replace.
6.CHECK MASS AIR FLOW SENSOR
With CONSULT-III
1. Install all removed parts.
2. Check "MASS AIR FLOW" in "DATA MONITOR" mode with CONSULT-III.
With GST
1. Install all removed parts.
2. Check mass air flow sensor signal in Service $01 with GST.
OK or NG
OK - GO TO 7.
NG - Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or grounds. See: P0101 See: P0101 See:
P0101.
7.CHECK FUNCTION OF FUEL INJECTOR
With CONSULT-III
1. Start engine.
2. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-III.
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-III
1. Start engine.
2. Listen to each fuel injector operating sound.
Clicking noise should be heard.
OK or NG
OK - GO TO 8.
NG - Perform trouble diagnosis for FUEL INJECTOR, See: Powertrain Management/Fuel Delivery and Air Induction/Description and
Operation/Fuel Injector See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Injector/Diagnosis Procedure.
8.CHECK FUEL INJECTOR
1. Confirm that the engine is cooled down and there are no fire hazards near the vehicle.
2. Turn ignition switch OFF.
3. Disconnect all fuel injector harness connectors.
4. Remove fuel injector gallery assembly. See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Rail/Service and Repair/Removal
And Installation.
Keep fuel hose and all fuel injectors connected to fuel injector gallery.
5. For DTC P0171, reconnect fuel injector harness connectors on bank 1.
For DTC P0174, reconnect fuel injector harness connectors on bank 2.
6. Disconnect all ignition coil harness connectors.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 165
7. Prepare pans or saucers under each fuel injector.
8. Crank engine for about 3 seconds.
For DTC P0171, make sure that fuel sprays out from fuel injectors on bank 1.
For DTC P0174, make sure that fuel sprays out from fuel injectors on bank 2.
Fuel should be sprayed evenly for each fuel injector.
OK or NG
OK - GO TO 9.
NG - Replace fuel injectors from which fuel does not spray out. Always replace O-ring with new ones.
9.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0175
P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
On Board Diagnosis Logic
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on
the mixture ratio feedback signal from the A/F sensors 1. The ECM calculates the necessary compensation to correct the offset between the actual
and the theoretical ratios.
In case the amount of the compensation value is extremely large (The actual mixture ratio is too rich.), the
ECM judges the condition as the fuel injection system malfunction and lights up the MIL (2 trip detection logic).
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
WITH CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON and select "SELF-LEARNING CONT" in "WORK SUPPORT" mode with CONSULT-III.
6. Clear the self-learning control coefficient by touching "CLEAR".
7. Start engine.
If it is difficult to start engine, the fuel injection system has a malfunction.
Performing the following procedure is advised.
a. Crank engine while depressing accelerator pedal.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 166
NOTE:
When depressing accelerator pedal three-fourths (3/4) or more, the control system does not start the engine. Do not depress accelerator pedal too
much.
b. If engine starts, go to See: P0172.
If engine does not start, check exhaust and intake air leakage visually.
8. Keep engine at idle for least 5 minutes.
9. Check 1st trip DTC.
10. The 1st trip DTC P0172 or P0175 should be detected at this stage, if a malfunction exists. If so, go to See: P0172.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine.
c. Maintain the following conditions for at least 10 consecutive minutes.
Hold the accelerator pedal as steady as possible.
CAUTION:
Always drive vehicle at a safe speed.
d. Check 1st trip DTC.
e. If 1st trip DTC is detected, go to See: P0172.
WITH GST
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Disconnect mass air flow sensor harness connector.
6. Restart engine and let it idle for at least 5 seconds.
7. Stop engine and reconnect mass air flow sensor harness connector.
8. Select Service $03 with GST. Make sure DTC P0102 is detected.
9. Select Service $04 with GST and erase the DTC P0102.
10. Start engine.
If it is difficult to start engine, the fuel injection system has a malfunction.
Performing the following procedure is advised.
a. Crank engine while depressing accelerator pedal.
NOTE:
When depressing accelerator pedal three-fourths (3/4) or more, the control system does not start the engine. Do not depress accelerator pedal too
much.
b. If engine starts, go to See: P0172.
If engine does not start, check exhaust and intake air leakage visually.
11. Keep engine at idle for at least 5 minutes.
12. Check 1st trip DTC.
13. The 1st trip DTC P0172 or P0175 should be detected at this stage, if a malfunction exists. If so, go to See: P0172.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine.
c. Maintain the following conditions for at least 10 consecutive minutes.
Hold the accelerator pedal as steady as possible.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 167
CAUTION:
Always drive vehicle at a safe speed.
d. Check 1st trip DTC.
e. If 1st trip DTC is detected, go to See: P0172.
Diagnosis Procedure
1.CHECK EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before three way catalyst (manifold).
OK or NG
OK - GO TO 2.
NG - Repair or replace.
2.CHECK FOR INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK - GO TO 3.
NG - Repair or replace.
3.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect corresponding A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to Wiring Diagram.
Continuity should exist.
5. Check harness continuity between the following terminals and ground. Refer to Wiring Diagram.
Continuity should not exist.
6. Also check harness for short to power.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 168
OK or NG
OK - GO TO 4.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK FUEL PRESSURE
1. Release fuel pressure to zero. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.
2. Install fuel pressure gauge and check fuel pressure. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel
Pressure/Testing and Inspection.
At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)
OK or NG
OK - GO TO 6.
NG - GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
- Fuel pump and circuit ( See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Pump See: Powertrain
Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Pump.)
- [Flexible Fuel Vehicle]
FPCM and circuit ( See: P1220 See: P1220 See: P1220.)
- Fuel pressure regulator ( See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.)
- Repair or replace.
6.CHECK MASS AIR FLOW SENSOR
With CONSULT-III
1. Install all removed parts.
2. Check "MASS AIR FLOW" in "DATA MONITOR" mode with CONSULT-III.
With GST
1. Install all removed parts.
2. Check mass air flow sensor signal in Service $01 with GST.
OK or NG
OK - GO TO 7.
NG - Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or grounds. See: P0101 See: P0101 See:
P0101.
7.CHECK FUNCTION OF FUEL INJECTOR
With CONSULT-III
1. Start engine.
2. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-III.
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-III
1. Start engine.
2. Listen to each fuel injector operating sound.
Clicking noise should be heard.
OK or NG
OK - GO TO 8.
NG - Perform trouble diagnosis for FUEL INJECTOR, See: Powertrain Management/Fuel Delivery and Air Induction/Description and
Operation/Fuel Injector See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Injector/Diagnosis Procedure.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 169
8.CHECK FUEL INJECTOR
1. Remove fuel injector assembly. See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Rail/Service and Repair/Removal And
Installation.
Keep fuel hose and all fuel injectors connected to fuel injector gallery.
2. Confirm that the engine is cooled down and there are no fire hazards near the vehicle.
3. Disconnect all fuel injector harness connectors.
4. Disconnect all ignition coil harness connectors.
5. Prepare pans or saucers under each fuel injectors.
6. Crank engine for about 3 seconds.
Make sure fuel does not drip from fuel injector.
OK or NG
OK (Does not drip.)-GO TO 9.
NG (Drips.)-Replace the fuel injectors from which fuel is dripping. Always replace O-ring with new one.
9.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0181
P0181 FTT SENSOR
Component Description
The fuel tank temperature sensor is used to detect the fuel temperature inside the fuel tank. The sensor modifies a voltage signal from the ECM.
The modified signal returns to the ECM as the fuel temperature input. The sensor uses a thermistor which is sensitive to the change in temperature.
The electrical resistance of the thermistor decreases as temperature increases.
[Reference data]
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor.
Use a ground other than ECM terminals, such as the ground.
On Board Diagnosis Logic
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 170
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
WITH CONSULT-III
1. Turn ignition switch ON and wait at least 10 seconds.
2. Check 1st trip DTC.
If 1st trip DTC is detected, go to See: P0181.
If 1st trip DTC is not detected, go to following step.
3. Select "DATA MONITOR" mode with CONSULT-III.
4. Check "COOLAN TEMP/S" value.
If the "COOLAN TEMP/S" is less than 60癈 (140癋), the result will be OK.
If the "COOLAN TEMP/S" is above 60癈 (140癋), go to the following step.
5. Cool engine down until "COOLAN TEMP/S" signal is less than 60癈 (140癋).
6. Wait at least 10 seconds.
7. Check 1st trip DTC.
8. If 1st trip DTC is detected, go to See: P0181.
WITH GST
Follow the procedure "WITH CONSULT-III" above.
Diagnosis Procedure
1.CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect "fuel level sensor unit and fuel pump" harness connector.
2. Turn ignition switch ON.
3. Check voltage between "fuel level sensor unit and fuel pump" terminal 4 and ground with CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 3.
NG - GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 171
- Harness connectors C1, E41
- Harness for open or short between ECM and "fuel level sensor unit and fuel pump"
- Repair harness or connector.
3.CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between "fuel level sensor unit and fuel pump" terminal 3 and ground. Refer to
Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK - GO TO 5.
NG - GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors C1, E41
- Harness for open or short between "fuel level sensor unit and fuel pump" and ground
- Repair open circuit or short to power in harness or connector.
5.CHECK FUEL TANK TEMPERATURE SENSOR
See: P0181.
OK or NG
OK - GO TO 6.
NG - Replace "fuel level sensor unit and fuel pump".
6.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
FUEL TANK TEMPERATURE SENSOR
1. Remove fuel level sensor unit.
2. Check resistance between "fuel level sensor unit and fuel pump" terminals 3 and 4 by heating with hot water as shown in the figure.
If NG, replace fuel level sensor unit.
P0182
P0182, P0183 FTT SENSOR
Component Description
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 172
The fuel tank temperature sensor is used to detect the fuel temperature inside the fuel tank. The sensor modifies a voltage signal from the ECM.
The modified signal returns to the ECM as the fuel temperature input. The sensor uses a thermistor which is sensitive to the change in temperature.
The electrical resistance of the thermistor decreases as temperature increases.
[Reference data]
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor.
Use a ground other than ECM terminals, such as the ground.
On Board Diagnosis Logic
DTC Confirmation Procedure
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Wait at least 5 seconds.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to See: P0182.
Diagnosis Procedure
1.CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 173
2. Disconnect "fuel level sensor unit and fuel pump" harness connector.
3. Turn ignition switch ON.
4. Check voltage between "fuel level sensor unit and fuel pump" terminal 4 and ground with CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 3.
NG - GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors C1, E41
- Harness for open or short between ECM and "fuel level sensor unit and fuel pump"
- Repair harness or connector.
3.CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between "fuel level sensor unit and fuel pump" terminal 3 and ground. Refer to
Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK - GO TO 5.
NG - GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors C1, E41
- Harness for open or short between "fuel level sensor unit and fuel pump" and ground
- Repair open circuit or short to power in harness or connector.
5.CHECK FUEL TANK TEMPERATURE SENSOR
See: P0182.
OK or NG
OK - GO TO 6.
NG - Replace "fuel level sensor unit and fuel pump".
6.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
FUEL TANK TEMPERATURE SENSOR
1. Remove fuel level sensor unit.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 174
2. Check resistance between "fuel level sensor unit and fuel pump" terminals 3 and 4 by heating with hot water as shown in the figure.
If NG, replace fuel level sensor unit.
P0183
P0182, P0183 FTT SENSOR
Component Description
The fuel tank temperature sensor is used to detect the fuel temperature inside the fuel tank. The sensor modifies a voltage signal from the ECM.
The modified signal returns to the ECM as the fuel temperature input. The sensor uses a thermistor which is sensitive to the change in temperature.
The electrical resistance of the thermistor decreases as temperature increases.
[Reference data]
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor.
Use a ground other than ECM terminals, such as the ground.
On Board Diagnosis Logic
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 175
DTC Confirmation Procedure
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Wait at least 5 seconds.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to See: P0182.
Diagnosis Procedure
1.CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect "fuel level sensor unit and fuel pump" harness connector.
3. Turn ignition switch ON.
4. Check voltage between "fuel level sensor unit and fuel pump" terminal 4 and ground with CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 3.
NG - GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors C1, E41
- Harness for open or short between ECM and "fuel level sensor unit and fuel pump"
- Repair harness or connector.
3.CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between "fuel level sensor unit and fuel pump" terminal 3 and ground. Refer to
Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK - GO TO 5.
NG - GO TO 4.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 176
4.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors C1, E41
- Harness for open or short between "fuel level sensor unit and fuel pump" and ground
- Repair open circuit or short to power in harness or connector.
5.CHECK FUEL TANK TEMPERATURE SENSOR
See: P0182.
OK or NG
OK - GO TO 6.
NG - Replace "fuel level sensor unit and fuel pump".
6.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
FUEL TANK TEMPERATURE SENSOR
1. Remove fuel level sensor unit.
2. Check resistance between "fuel level sensor unit and fuel pump" terminals 3 and 4 by heating with hot water as shown in the figure.
If NG, replace fuel level sensor unit.
P0222
P0222, P0223 APP SENSOR
Component Description
Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc. The throttle position sensor responds to the throttle
valve movement.
The throttle position sensor has the two sensors. These sensors are a kind of potentiometers which transform the throttle valve position into output
voltage, and emit the voltage signal to the ECM. In addition, these sensors detect the opening and closing speed of the throttle valve and feed the
voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle
control motor to make the throttle valve opening angle properly in response to driving condition.
On Board Diagnosis Logic
These self-diagnoses have the one trip detection logic.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 177
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to See: P0222.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Power Supply
And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK THROTTLE POSITION SENSOR 1 POWER SUPPLY CIRCUIT-I
1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition switch ON.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 178
3. Check voltage between electric throttle control actuator terminal
2 and ground with CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 7.
NG - GO TO 3.
3.CHECK THROTTLE POSITION SENSOR 1 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 2 and ECM terminal 47. Refer to Wiring Diagram.
Continuity should exist.
OK or NG
OK - GO TO 4.
NG - Repair open circuit.
4.CHECK THROTTLE POSITION SENSOR 1 POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the following terminals.
OK or NG
OK - GO TO 5.
NG - Repair short to ground or short to power in harness or connectors.
5.CHECK ACCELERATOR PEDAL POSITION SENSOR
See: P2138.
OK or NG
OK - GO TO 11.
NG - GO TO 6.
6.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace the accelerator pedal assembly.
2. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
3. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
4. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
7.CHECK THROTTLE POSITION SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 4 and ECM terminal 66. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 8.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK THROTTLE POSITION SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 50 and electric throttle control actuator terminal 1. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 179
OK or NG
OK - GO TO 9.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK THROTTLE POSITION SENSOR
See: P0222.
OK or NG
OK - GO TO 11.
NG - GO TO 10.
10.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
3. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
11.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
THROTTLE POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
3. Turn ignition switch ON.
4. Set selector lever to D position.
5. Check voltage between ECM terminals 50 (TP sensor 1 signal), 69 (TP sensor 2 signal) and ground under the following conditions.
6. If NG, replace electric throttle control actuator and go to the next step.
7. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
8. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
P0223
P0222, P0223 APP SENSOR
Component Description
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 180
Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc. The throttle position sensor responds to the throttle
valve movement.
The throttle position sensor has the two sensors. These sensors are a kind of potentiometers which transform the throttle valve position into output
voltage, and emit the voltage signal to the ECM. In addition, these sensors detect the opening and closing speed of the throttle valve and feed the
voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle
control motor to make the throttle valve opening angle properly in response to driving condition.
On Board Diagnosis Logic
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to See: P0222.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Power Supply
And Ground Circuit/Ground Inspection.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 181
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK THROTTLE POSITION SENSOR 1 POWER SUPPLY CIRCUIT-I
1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition switch ON.
3. Check voltage between electric throttle control actuator terminal
2 and ground with CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 7.
NG - GO TO 3.
3.CHECK THROTTLE POSITION SENSOR 1 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 2 and ECM terminal 47. Refer to Wiring Diagram.
Continuity should exist.
OK or NG
OK - GO TO 4.
NG - Repair open circuit.
4.CHECK THROTTLE POSITION SENSOR 1 POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the following terminals.
OK or NG
OK - GO TO 5.
NG - Repair short to ground or short to power in harness or connectors.
5.CHECK ACCELERATOR PEDAL POSITION SENSOR
See: P2138.
OK or NG
OK - GO TO 11.
NG - GO TO 6.
6.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace the accelerator pedal assembly.
2. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
3. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 182
Closed Position Learning.
4. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
7.CHECK THROTTLE POSITION SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 4 and ECM terminal 66. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 8.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK THROTTLE POSITION SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 50 and electric throttle control actuator terminal 1. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 9.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK THROTTLE POSITION SENSOR
See: P0222.
OK or NG
OK - GO TO 11.
NG - GO TO 10.
10.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
3. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
11.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
THROTTLE POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
3. Turn ignition switch ON.
4. Set selector lever to D position.
5. Check voltage between ECM terminals 50 (TP sensor 1 signal), 69 (TP sensor 2 signal) and ground under the following conditions.
6. If NG, replace electric throttle control actuator and go to the next step.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 183
7. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
8. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
P0300
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
On Board Diagnosis Logic
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft position (CKP) sensor (POS)
signal to vary, ECM can determine that a misfire is occurring.
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Three Way Catalyst Damage)
On the 1st trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to overheating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only light when the misfire is detected on a
second trip. During this condition, the ECM monitors the CKP sensor signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
DTC Confirmation Procedure
CAUTION:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when driving.
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Restart engine and let it idle for about 15 minutes.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to See: P0300.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine and drive the vehicle under the similar conditions to (1st trip) Freeze Frame Data for a certain time. Refer to the table below.
Hold the accelerator pedal as steady as possible.
The similar conditions to (1st trip) Freeze Frame Data means the vehicle operation that the following conditions should be satisfied at the same
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 184
time.
The time to driving varies according to the engine speed in the freeze frame data.
Diagnosis Procedure
1.CHECK FOR INTAKE AIR LEAK AND PCV HOSE
1. Start engine and run it at idle speed.
2. Listen for the sound of the intake air leak.
3. Check PCV hose connection.
OK or NG
OK - GO TO 2.
NG - Discover air leak location and repair.
2.CHECK FOR EXHAUST SYSTEM CLOGGING
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
OK or NG
OK - GO TO 3.
NG - Repair or replace it.
3.PERFORM POWER BALANCE TEST
With CONSULT-III
1. Perform "POWER BALANCE" in "ACTIVE TEST" mode.
2. Is there any cylinder which does not produce a momentary engine speed drop?
Without CONSULT-III
When disconnecting each fuel injector harness connector one at a time, is there any cylinder which does not produce a momentary engine speed
drop?
Yes or No
Yes - GO TO 4.
No - GO TO 7.
4.CHECK FUEL INJECTOR
Does each fuel injector make an operating sound at idle?
Yes or No
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 185
Yes - GO TO 5.
No - Check fuel injector(s) and circuit(s). See: Powertrain Management/Fuel Delivery and Air Induction/Description and Operation/Fuel Injector
See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Injector/Diagnosis Procedure.
5.CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following procedure.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked.
8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - 0.66 in) between the edge of the spark plug and grounded metal portion as
shown in the figure.
11. Crank engine for about 3 seconds, and check whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
CAUTION:
- During the operation, always stay 0.5 m (1.6 ft) or more away from the spark plug and the ignition coil. Be careful not to get an electrical
shock while checking, because the electrical discharge voltage becomes
20kV or more.
- It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is malfunctioning.
OK or NG
OK - GO TO 9.
NG - GO TO 6.
6.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a known-good spark plug.
3. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
OK or NG
OK - GO TO 7.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 186
NG - Check ignition coil, power transistor and their circuits. See: Powertrain Management/Computers and Control Systems/Description and
Operation/Ignition Signal See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General
Diagnostics/Ignition Signal/Diagnosis Procedure.
7.CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
OK or NG
OK - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
NG - 1. Repair or clean spark plug.
2. GO TO 8.
8.CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded portion.
Spark should be generated.
OK or NG
OK - INSPECTION END
NG - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
9.CHECK COMPRESSION PRESSURE
Check compression pressure. See: Engine, Cooling and Exhaust/Engine/Compression Check/Testing and Inspection.
OK or NG
OK - GO TO 10.
NG - Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
10.CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.
3. Install fuel pressure gauge and check fuel pressure. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel
Pressure/Testing and Inspection.
At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)
OK or NG
OK - GO TO 12.
NG - GO TO 11.
11.DETECT MALFUNCTIONING PART
Check the following.
- Fuel pump and circuit ( See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Pump.)
- [Flexible Fuel Vehicle]
FPCM and circuit ( See: P1220.)
- Fuel pressure regulator ( See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.)
- Fuel lines
- Fuel filter for clogging
- Repair or replace.
12.CHECK IGNITION TIMING
Check the following items. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and
Diagnostic Overview/Basic Inspection.
OK or NG
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 187
OK - GO TO 13.
NG - Follow the See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Basic Inspection.
13.CHECK A/F SENSOR 1 INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to Wiring Diagram.
Continuity should exist.
5. Check harness continuity between the following terminals and ground. Refer to Wiring Diagram.
Continuity should not exist.
6. Also check harness for short to power.
OK or NG
OK - GO TO 14.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
14.CHECK A/F SENSOR 1 HEATER
See: P0031.
OK or NG
OK - GO TO 16.
NG - GO TO 15.
15.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:
- Discard any air fuel ratio (A/F) sensor which has been dropped from a height of more than 0.5 m (1.6 ft) onto a hard surface such as a
concrete floor; use a new one.
- Before installing new air fuel ratio (A/F) sensor, clean exhaust system threads (using Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12) and approved anti-seize lubricant.
- INSPECTION END
16.CHECK MASS AIR FLOW SENSOR
With CONSULT-III
Check mass air flow sensor signal in "DATA MONITOR" mode with CONSULT-III.
With GST
Check mass air flow sensor signal in Service $01 with GST.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 188
OK or NG
OK - GO TO 17.
NG - Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or ground. See: P0101 See: P0101 See:
P0101.
17.CHECK SYMPTOM MATRIX CHART
Check items on the rough idle symptom in See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Symptom
Related Diagnostic Procedures.
OK or NG
OK - GO TO 18.
NG - Repair or replace.
18.ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memory after performing the tests. See: .
- GO TO 19.
19.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0301
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
On Board Diagnosis Logic
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft position (CKP) sensor (POS)
signal to vary, ECM can determine that a misfire is occurring.
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Three Way Catalyst Damage)
On the 1st trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to overheating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only light when the misfire is detected on a
second trip. During this condition, the ECM monitors the CKP sensor signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
DTC Confirmation Procedure
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 189
CAUTION:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when driving.
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Restart engine and let it idle for about 15 minutes.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to See: P0300.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine and drive the vehicle under the similar conditions to (1st trip) Freeze Frame Data for a certain time. Refer to the table below.
Hold the accelerator pedal as steady as possible.
The similar conditions to (1st trip) Freeze Frame Data means the vehicle operation that the following conditions should be satisfied at the same
time.
The time to driving varies according to the engine speed in the freeze frame data.
Diagnosis Procedure
1.CHECK FOR INTAKE AIR LEAK AND PCV HOSE
1. Start engine and run it at idle speed.
2. Listen for the sound of the intake air leak.
3. Check PCV hose connection.
OK or NG
OK - GO TO 2.
NG - Discover air leak location and repair.
2.CHECK FOR EXHAUST SYSTEM CLOGGING
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
OK or NG
OK - GO TO 3.
NG - Repair or replace it.
3.PERFORM POWER BALANCE TEST
With CONSULT-III
1. Perform "POWER BALANCE" in "ACTIVE TEST" mode.
2. Is there any cylinder which does not produce a momentary engine speed drop?
Without CONSULT-III
When disconnecting each fuel injector harness connector one at a time, is there any cylinder which does not produce a momentary engine speed
drop?
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 190
Yes or No
Yes - GO TO 4.
No - GO TO 7.
4.CHECK FUEL INJECTOR
Does each fuel injector make an operating sound at idle?
Yes or No
Yes - GO TO 5.
No - Check fuel injector(s) and circuit(s). See: Powertrain Management/Fuel Delivery and Air Induction/Description and Operation/Fuel Injector
See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Injector/Diagnosis Procedure.
5.CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following procedure.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked.
8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - 0.66 in) between the edge of the spark plug and grounded metal portion as
shown in the figure.
11. Crank engine for about 3 seconds, and check whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
CAUTION:
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 191
- During the operation, always stay 0.5 m (1.6 ft) or more away from the spark plug and the ignition coil. Be careful not to get an electrical
shock while checking, because the electrical discharge voltage becomes
20kV or more.
- It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is malfunctioning.
OK or NG
OK - GO TO 9.
NG - GO TO 6.
6.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a known-good spark plug.
3. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
OK or NG
OK - GO TO 7.
NG - Check ignition coil, power transistor and their circuits. See: Powertrain Management/Computers and Control Systems/Description and
Operation/Ignition Signal See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General
Diagnostics/Ignition Signal/Diagnosis Procedure.
7.CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
OK or NG
OK - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
NG - 1. Repair or clean spark plug.
2. GO TO 8.
8.CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded portion.
Spark should be generated.
OK or NG
OK - INSPECTION END
NG - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
9.CHECK COMPRESSION PRESSURE
Check compression pressure. See: Engine, Cooling and Exhaust/Engine/Compression Check/Testing and Inspection.
OK or NG
OK - GO TO 10.
NG - Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
10.CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.
3. Install fuel pressure gauge and check fuel pressure. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel
Pressure/Testing and Inspection.
At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)
OK or NG
OK - GO TO 12.
NG - GO TO 11.
11.DETECT MALFUNCTIONING PART
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 192
Check the following.
- Fuel pump and circuit ( See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Pump.)
- [Flexible Fuel Vehicle]
FPCM and circuit ( See: P1220.)
- Fuel pressure regulator ( See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.)
- Fuel lines
- Fuel filter for clogging
- Repair or replace.
12.CHECK IGNITION TIMING
Check the following items. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and
Diagnostic Overview/Basic Inspection.
OK or NG
OK - GO TO 13.
NG - Follow the See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Basic Inspection.
13.CHECK A/F SENSOR 1 INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to Wiring Diagram.
Continuity should exist.
5. Check harness continuity between the following terminals and ground. Refer to Wiring Diagram.
Continuity should not exist.
6. Also check harness for short to power.
OK or NG
OK - GO TO 14.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
14.CHECK A/F SENSOR 1 HEATER
See: P0031.
OK or NG
OK - GO TO 16.
NG - GO TO 15.
15.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 193
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:
- Discard any air fuel ratio (A/F) sensor which has been dropped from a height of more than 0.5 m (1.6 ft) onto a hard surface such as a
concrete floor; use a new one.
- Before installing new air fuel ratio (A/F) sensor, clean exhaust system threads (using Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12) and approved anti-seize lubricant.
- INSPECTION END
16.CHECK MASS AIR FLOW SENSOR
With CONSULT-III
Check mass air flow sensor signal in "DATA MONITOR" mode with CONSULT-III.
With GST
Check mass air flow sensor signal in Service $01 with GST.
OK or NG
OK - GO TO 17.
NG - Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or ground. See: P0101 See: P0101 See:
P0101.
17.CHECK SYMPTOM MATRIX CHART
Check items on the rough idle symptom in See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Symptom
Related Diagnostic Procedures.
OK or NG
OK - GO TO 18.
NG - Repair or replace.
18.ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memory after performing the tests. See: .
- GO TO 19.
19.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0302
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
On Board Diagnosis Logic
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft position (CKP) sensor (POS)
signal to vary, ECM can determine that a misfire is occurring.
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Three Way Catalyst Damage)
On the 1st trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to overheating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only light when the misfire is detected on a
second trip. During this condition, the ECM monitors the CKP sensor signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 194
DTC Confirmation Procedure
CAUTION:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when driving.
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Restart engine and let it idle for about 15 minutes.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to See: P0300.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine and drive the vehicle under the similar conditions to (1st trip) Freeze Frame Data for a certain time. Refer to the table below.
Hold the accelerator pedal as steady as possible.
The similar conditions to (1st trip) Freeze Frame Data means the vehicle operation that the following conditions should be satisfied at the same
time.
The time to driving varies according to the engine speed in the freeze frame data.
Diagnosis Procedure
1.CHECK FOR INTAKE AIR LEAK AND PCV HOSE
1. Start engine and run it at idle speed.
2. Listen for the sound of the intake air leak.
3. Check PCV hose connection.
OK or NG
OK - GO TO 2.
NG - Discover air leak location and repair.
2.CHECK FOR EXHAUST SYSTEM CLOGGING
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 195
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
OK or NG
OK - GO TO 3.
NG - Repair or replace it.
3.PERFORM POWER BALANCE TEST
With CONSULT-III
1. Perform "POWER BALANCE" in "ACTIVE TEST" mode.
2. Is there any cylinder which does not produce a momentary engine speed drop?
Without CONSULT-III
When disconnecting each fuel injector harness connector one at a time, is there any cylinder which does not produce a momentary engine speed
drop?
Yes or No
Yes - GO TO 4.
No - GO TO 7.
4.CHECK FUEL INJECTOR
Does each fuel injector make an operating sound at idle?
Yes or No
Yes - GO TO 5.
No - Check fuel injector(s) and circuit(s). See: Powertrain Management/Fuel Delivery and Air Induction/Description and Operation/Fuel Injector
See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Injector/Diagnosis Procedure.
5.CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following procedure.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 196
8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - 0.66 in) between the edge of the spark plug and grounded metal portion as
shown in the figure.
11. Crank engine for about 3 seconds, and check whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
CAUTION:
- During the operation, always stay 0.5 m (1.6 ft) or more away from the spark plug and the ignition coil. Be careful not to get an electrical
shock while checking, because the electrical discharge voltage becomes
20kV or more.
- It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is malfunctioning.
OK or NG
OK - GO TO 9.
NG - GO TO 6.
6.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a known-good spark plug.
3. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
OK or NG
OK - GO TO 7.
NG - Check ignition coil, power transistor and their circuits. See: Powertrain Management/Computers and Control Systems/Description and
Operation/Ignition Signal See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General
Diagnostics/Ignition Signal/Diagnosis Procedure.
7.CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
OK or NG
OK - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
NG - 1. Repair or clean spark plug.
2. GO TO 8.
8.CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded portion.
Spark should be generated.
OK or NG
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 197
OK - INSPECTION END
NG - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
9.CHECK COMPRESSION PRESSURE
Check compression pressure. See: Engine, Cooling and Exhaust/Engine/Compression Check/Testing and Inspection.
OK or NG
OK - GO TO 10.
NG - Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
10.CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.
3. Install fuel pressure gauge and check fuel pressure. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel
Pressure/Testing and Inspection.
At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)
OK or NG
OK - GO TO 12.
NG - GO TO 11.
11.DETECT MALFUNCTIONING PART
Check the following.
- Fuel pump and circuit ( See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Pump.)
- [Flexible Fuel Vehicle]
FPCM and circuit ( See: P1220.)
- Fuel pressure regulator ( See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.)
- Fuel lines
- Fuel filter for clogging
- Repair or replace.
12.CHECK IGNITION TIMING
Check the following items. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and
Diagnostic Overview/Basic Inspection.
OK or NG
OK - GO TO 13.
NG - Follow the See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Basic Inspection.
13.CHECK A/F SENSOR 1 INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to Wiring Diagram.
Continuity should exist.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 198
5. Check harness continuity between the following terminals and ground. Refer to Wiring Diagram.
Continuity should not exist.
6. Also check harness for short to power.
OK or NG
OK - GO TO 14.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
14.CHECK A/F SENSOR 1 HEATER
See: P0031.
OK or NG
OK - GO TO 16.
NG - GO TO 15.
15.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:
- Discard any air fuel ratio (A/F) sensor which has been dropped from a height of more than 0.5 m (1.6 ft) onto a hard surface such as a
concrete floor; use a new one.
- Before installing new air fuel ratio (A/F) sensor, clean exhaust system threads (using Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12) and approved anti-seize lubricant.
- INSPECTION END
16.CHECK MASS AIR FLOW SENSOR
With CONSULT-III
Check mass air flow sensor signal in "DATA MONITOR" mode with CONSULT-III.
With GST
Check mass air flow sensor signal in Service $01 with GST.
OK or NG
OK - GO TO 17.
NG - Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or ground. See: P0101 See: P0101 See:
P0101.
17.CHECK SYMPTOM MATRIX CHART
Check items on the rough idle symptom in See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Symptom
Related Diagnostic Procedures.
OK or NG
OK - GO TO 18.
NG - Repair or replace.
18.ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memory after performing the tests. See: .
- GO TO 19.
19.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0303
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
On Board Diagnosis Logic
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft position (CKP) sensor (POS)
signal to vary, ECM can determine that a misfire is occurring.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 199
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Three Way Catalyst Damage)
On the 1st trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to overheating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only light when the misfire is detected on a
second trip. During this condition, the ECM monitors the CKP sensor signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
DTC Confirmation Procedure
CAUTION:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when driving.
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Restart engine and let it idle for about 15 minutes.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to See: P0300.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine and drive the vehicle under the similar conditions to (1st trip) Freeze Frame Data for a certain time. Refer to the table below.
Hold the accelerator pedal as steady as possible.
The similar conditions to (1st trip) Freeze Frame Data means the vehicle operation that the following conditions should be satisfied at the same
time.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 200
The time to driving varies according to the engine speed in the freeze frame data.
Diagnosis Procedure
1.CHECK FOR INTAKE AIR LEAK AND PCV HOSE
1. Start engine and run it at idle speed.
2. Listen for the sound of the intake air leak.
3. Check PCV hose connection.
OK or NG
OK - GO TO 2.
NG - Discover air leak location and repair.
2.CHECK FOR EXHAUST SYSTEM CLOGGING
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
OK or NG
OK - GO TO 3.
NG - Repair or replace it.
3.PERFORM POWER BALANCE TEST
With CONSULT-III
1. Perform "POWER BALANCE" in "ACTIVE TEST" mode.
2. Is there any cylinder which does not produce a momentary engine speed drop?
Without CONSULT-III
When disconnecting each fuel injector harness connector one at a time, is there any cylinder which does not produce a momentary engine speed
drop?
Yes or No
Yes - GO TO 4.
No - GO TO 7.
4.CHECK FUEL INJECTOR
Does each fuel injector make an operating sound at idle?
Yes or No
Yes - GO TO 5.
No - Check fuel injector(s) and circuit(s). See: Powertrain Management/Fuel Delivery and Air Induction/Description and Operation/Fuel Injector
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 201
See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Injector/Diagnosis Procedure.
5.CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following procedure.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked.
8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - 0.66 in) between the edge of the spark plug and grounded metal portion as
shown in the figure.
11. Crank engine for about 3 seconds, and check whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
CAUTION:
- During the operation, always stay 0.5 m (1.6 ft) or more away from the spark plug and the ignition coil. Be careful not to get an electrical
shock while checking, because the electrical discharge voltage becomes
20kV or more.
- It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is malfunctioning.
OK or NG
OK - GO TO 9.
NG - GO TO 6.
6.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a known-good spark plug.
3. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
OK or NG
OK - GO TO 7.
NG - Check ignition coil, power transistor and their circuits. See: Powertrain Management/Computers and Control Systems/Description and
Operation/Ignition Signal See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 202
Diagnostics/Ignition Signal/Diagnosis Procedure.
7.CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
OK or NG
OK - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
NG - 1. Repair or clean spark plug.
2. GO TO 8.
8.CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded portion.
Spark should be generated.
OK or NG
OK - INSPECTION END
NG - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
9.CHECK COMPRESSION PRESSURE
Check compression pressure. See: Engine, Cooling and Exhaust/Engine/Compression Check/Testing and Inspection.
OK or NG
OK - GO TO 10.
NG - Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
10.CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.
3. Install fuel pressure gauge and check fuel pressure. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel
Pressure/Testing and Inspection.
At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)
OK or NG
OK - GO TO 12.
NG - GO TO 11.
11.DETECT MALFUNCTIONING PART
Check the following.
- Fuel pump and circuit ( See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Pump.)
- [Flexible Fuel Vehicle]
FPCM and circuit ( See: P1220.)
- Fuel pressure regulator ( See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.)
- Fuel lines
- Fuel filter for clogging
- Repair or replace.
12.CHECK IGNITION TIMING
Check the following items. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and
Diagnostic Overview/Basic Inspection.
OK or NG
OK - GO TO 13.
NG - Follow the See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 203
Overview/Basic Inspection.
13.CHECK A/F SENSOR 1 INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to Wiring Diagram.
Continuity should exist.
5. Check harness continuity between the following terminals and ground. Refer to Wiring Diagram.
Continuity should not exist.
6. Also check harness for short to power.
OK or NG
OK - GO TO 14.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
14.CHECK A/F SENSOR 1 HEATER
See: P0031.
OK or NG
OK - GO TO 16.
NG - GO TO 15.
15.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:
- Discard any air fuel ratio (A/F) sensor which has been dropped from a height of more than 0.5 m (1.6 ft) onto a hard surface such as a
concrete floor; use a new one.
- Before installing new air fuel ratio (A/F) sensor, clean exhaust system threads (using Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12) and approved anti-seize lubricant.
- INSPECTION END
16.CHECK MASS AIR FLOW SENSOR
With CONSULT-III
Check mass air flow sensor signal in "DATA MONITOR" mode with CONSULT-III.
With GST
Check mass air flow sensor signal in Service $01 with GST.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 204
OK or NG
OK - GO TO 17.
NG - Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or ground. See: P0101 See: P0101 See:
P0101.
17.CHECK SYMPTOM MATRIX CHART
Check items on the rough idle symptom in See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Symptom
Related Diagnostic Procedures.
OK or NG
OK - GO TO 18.
NG - Repair or replace.
18.ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memory after performing the tests. See: .
- GO TO 19.
19.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0304
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
On Board Diagnosis Logic
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft position (CKP) sensor (POS)
signal to vary, ECM can determine that a misfire is occurring.
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Three Way Catalyst Damage)
On the 1st trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to overheating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only light when the misfire is detected on a
second trip. During this condition, the ECM monitors the CKP sensor signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
DTC Confirmation Procedure
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 205
CAUTION:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when driving.
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Restart engine and let it idle for about 15 minutes.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to See: P0300.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine and drive the vehicle under the similar conditions to (1st trip) Freeze Frame Data for a certain time. Refer to the table below.
Hold the accelerator pedal as steady as possible.
The similar conditions to (1st trip) Freeze Frame Data means the vehicle operation that the following conditions should be satisfied at the same
time.
The time to driving varies according to the engine speed in the freeze frame data.
Diagnosis Procedure
1.CHECK FOR INTAKE AIR LEAK AND PCV HOSE
1. Start engine and run it at idle speed.
2. Listen for the sound of the intake air leak.
3. Check PCV hose connection.
OK or NG
OK - GO TO 2.
NG - Discover air leak location and repair.
2.CHECK FOR EXHAUST SYSTEM CLOGGING
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
OK or NG
OK - GO TO 3.
NG - Repair or replace it.
3.PERFORM POWER BALANCE TEST
With CONSULT-III
1. Perform "POWER BALANCE" in "ACTIVE TEST" mode.
2. Is there any cylinder which does not produce a momentary engine speed drop?
Without CONSULT-III
When disconnecting each fuel injector harness connector one at a time, is there any cylinder which does not produce a momentary engine speed
drop?
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 206
Yes or No
Yes - GO TO 4.
No - GO TO 7.
4.CHECK FUEL INJECTOR
Does each fuel injector make an operating sound at idle?
Yes or No
Yes - GO TO 5.
No - Check fuel injector(s) and circuit(s). See: Powertrain Management/Fuel Delivery and Air Induction/Description and Operation/Fuel Injector
See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Injector/Diagnosis Procedure.
5.CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following procedure.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked.
8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - 0.66 in) between the edge of the spark plug and grounded metal portion as
shown in the figure.
11. Crank engine for about 3 seconds, and check whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
CAUTION:
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 207
- During the operation, always stay 0.5 m (1.6 ft) or more away from the spark plug and the ignition coil. Be careful not to get an electrical
shock while checking, because the electrical discharge voltage becomes
20kV or more.
- It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is malfunctioning.
OK or NG
OK - GO TO 9.
NG - GO TO 6.
6.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a known-good spark plug.
3. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
OK or NG
OK - GO TO 7.
NG - Check ignition coil, power transistor and their circuits. See: Powertrain Management/Computers and Control Systems/Description and
Operation/Ignition Signal See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General
Diagnostics/Ignition Signal/Diagnosis Procedure.
7.CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
OK or NG
OK - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
NG - 1. Repair or clean spark plug.
2. GO TO 8.
8.CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded portion.
Spark should be generated.
OK or NG
OK - INSPECTION END
NG - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
9.CHECK COMPRESSION PRESSURE
Check compression pressure. See: Engine, Cooling and Exhaust/Engine/Compression Check/Testing and Inspection.
OK or NG
OK - GO TO 10.
NG - Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
10.CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.
3. Install fuel pressure gauge and check fuel pressure. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel
Pressure/Testing and Inspection.
At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)
OK or NG
OK - GO TO 12.
NG - GO TO 11.
11.DETECT MALFUNCTIONING PART
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 208
Check the following.
- Fuel pump and circuit ( See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Pump.)
- [Flexible Fuel Vehicle]
FPCM and circuit ( See: P1220.)
- Fuel pressure regulator ( See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.)
- Fuel lines
- Fuel filter for clogging
- Repair or replace.
12.CHECK IGNITION TIMING
Check the following items. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and
Diagnostic Overview/Basic Inspection.
OK or NG
OK - GO TO 13.
NG - Follow the See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Basic Inspection.
13.CHECK A/F SENSOR 1 INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to Wiring Diagram.
Continuity should exist.
5. Check harness continuity between the following terminals and ground. Refer to Wiring Diagram.
Continuity should not exist.
6. Also check harness for short to power.
OK or NG
OK - GO TO 14.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
14.CHECK A/F SENSOR 1 HEATER
See: P0031.
OK or NG
OK - GO TO 16.
NG - GO TO 15.
15.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 209
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:
- Discard any air fuel ratio (A/F) sensor which has been dropped from a height of more than 0.5 m (1.6 ft) onto a hard surface such as a
concrete floor; use a new one.
- Before installing new air fuel ratio (A/F) sensor, clean exhaust system threads (using Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12) and approved anti-seize lubricant.
- INSPECTION END
16.CHECK MASS AIR FLOW SENSOR
With CONSULT-III
Check mass air flow sensor signal in "DATA MONITOR" mode with CONSULT-III.
With GST
Check mass air flow sensor signal in Service $01 with GST.
OK or NG
OK - GO TO 17.
NG - Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or ground. See: P0101 See: P0101 See:
P0101.
17.CHECK SYMPTOM MATRIX CHART
Check items on the rough idle symptom in See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Symptom
Related Diagnostic Procedures.
OK or NG
OK - GO TO 18.
NG - Repair or replace.
18.ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memory after performing the tests. See: .
- GO TO 19.
19.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0305
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
On Board Diagnosis Logic
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft position (CKP) sensor (POS)
signal to vary, ECM can determine that a misfire is occurring.
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Three Way Catalyst Damage)
On the 1st trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to overheating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only light when the misfire is detected on a
second trip. During this condition, the ECM monitors the CKP sensor signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 210
DTC Confirmation Procedure
CAUTION:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when driving.
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Restart engine and let it idle for about 15 minutes.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to See: P0300.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine and drive the vehicle under the similar conditions to (1st trip) Freeze Frame Data for a certain time. Refer to the table below.
Hold the accelerator pedal as steady as possible.
The similar conditions to (1st trip) Freeze Frame Data means the vehicle operation that the following conditions should be satisfied at the same
time.
The time to driving varies according to the engine speed in the freeze frame data.
Diagnosis Procedure
1.CHECK FOR INTAKE AIR LEAK AND PCV HOSE
1. Start engine and run it at idle speed.
2. Listen for the sound of the intake air leak.
3. Check PCV hose connection.
OK or NG
OK - GO TO 2.
NG - Discover air leak location and repair.
2.CHECK FOR EXHAUST SYSTEM CLOGGING
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 211
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
OK or NG
OK - GO TO 3.
NG - Repair or replace it.
3.PERFORM POWER BALANCE TEST
With CONSULT-III
1. Perform "POWER BALANCE" in "ACTIVE TEST" mode.
2. Is there any cylinder which does not produce a momentary engine speed drop?
Without CONSULT-III
When disconnecting each fuel injector harness connector one at a time, is there any cylinder which does not produce a momentary engine speed
drop?
Yes or No
Yes - GO TO 4.
No - GO TO 7.
4.CHECK FUEL INJECTOR
Does each fuel injector make an operating sound at idle?
Yes or No
Yes - GO TO 5.
No - Check fuel injector(s) and circuit(s). See: Powertrain Management/Fuel Delivery and Air Induction/Description and Operation/Fuel Injector
See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Injector/Diagnosis Procedure.
5.CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following procedure.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 212
8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - 0.66 in) between the edge of the spark plug and grounded metal portion as
shown in the figure.
11. Crank engine for about 3 seconds, and check whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
CAUTION:
- During the operation, always stay 0.5 m (1.6 ft) or more away from the spark plug and the ignition coil. Be careful not to get an electrical
shock while checking, because the electrical discharge voltage becomes
20kV or more.
- It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is malfunctioning.
OK or NG
OK - GO TO 9.
NG - GO TO 6.
6.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a known-good spark plug.
3. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
OK or NG
OK - GO TO 7.
NG - Check ignition coil, power transistor and their circuits. See: Powertrain Management/Computers and Control Systems/Description and
Operation/Ignition Signal See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General
Diagnostics/Ignition Signal/Diagnosis Procedure.
7.CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
OK or NG
OK - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
NG - 1. Repair or clean spark plug.
2. GO TO 8.
8.CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded portion.
Spark should be generated.
OK or NG
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 213
OK - INSPECTION END
NG - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
9.CHECK COMPRESSION PRESSURE
Check compression pressure. See: Engine, Cooling and Exhaust/Engine/Compression Check/Testing and Inspection.
OK or NG
OK - GO TO 10.
NG - Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
10.CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.
3. Install fuel pressure gauge and check fuel pressure. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel
Pressure/Testing and Inspection.
At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)
OK or NG
OK - GO TO 12.
NG - GO TO 11.
11.DETECT MALFUNCTIONING PART
Check the following.
- Fuel pump and circuit ( See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Pump.)
- [Flexible Fuel Vehicle]
FPCM and circuit ( See: P1220.)
- Fuel pressure regulator ( See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.)
- Fuel lines
- Fuel filter for clogging
- Repair or replace.
12.CHECK IGNITION TIMING
Check the following items. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and
Diagnostic Overview/Basic Inspection.
OK or NG
OK - GO TO 13.
NG - Follow the See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Basic Inspection.
13.CHECK A/F SENSOR 1 INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to Wiring Diagram.
Continuity should exist.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 214
5. Check harness continuity between the following terminals and ground. Refer to Wiring Diagram.
Continuity should not exist.
6. Also check harness for short to power.
OK or NG
OK - GO TO 14.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
14.CHECK A/F SENSOR 1 HEATER
See: P0031.
OK or NG
OK - GO TO 16.
NG - GO TO 15.
15.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:
- Discard any air fuel ratio (A/F) sensor which has been dropped from a height of more than 0.5 m (1.6 ft) onto a hard surface such as a
concrete floor; use a new one.
- Before installing new air fuel ratio (A/F) sensor, clean exhaust system threads (using Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12) and approved anti-seize lubricant.
- INSPECTION END
16.CHECK MASS AIR FLOW SENSOR
With CONSULT-III
Check mass air flow sensor signal in "DATA MONITOR" mode with CONSULT-III.
With GST
Check mass air flow sensor signal in Service $01 with GST.
OK or NG
OK - GO TO 17.
NG - Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or ground. See: P0101 See: P0101 See:
P0101.
17.CHECK SYMPTOM MATRIX CHART
Check items on the rough idle symptom in See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Symptom
Related Diagnostic Procedures.
OK or NG
OK - GO TO 18.
NG - Repair or replace.
18.ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memory after performing the tests. See: .
- GO TO 19.
19.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0306
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
On Board Diagnosis Logic
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft position (CKP) sensor (POS)
signal to vary, ECM can determine that a misfire is occurring.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 215
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Three Way Catalyst Damage)
On the 1st trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to overheating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only light when the misfire is detected on a
second trip. During this condition, the ECM monitors the CKP sensor signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
DTC Confirmation Procedure
CAUTION:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when driving.
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Restart engine and let it idle for about 15 minutes.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to See: P0300.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine and drive the vehicle under the similar conditions to (1st trip) Freeze Frame Data for a certain time. Refer to the table below.
Hold the accelerator pedal as steady as possible.
The similar conditions to (1st trip) Freeze Frame Data means the vehicle operation that the following conditions should be satisfied at the same
time.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 216
The time to driving varies according to the engine speed in the freeze frame data.
Diagnosis Procedure
1.CHECK FOR INTAKE AIR LEAK AND PCV HOSE
1. Start engine and run it at idle speed.
2. Listen for the sound of the intake air leak.
3. Check PCV hose connection.
OK or NG
OK - GO TO 2.
NG - Discover air leak location and repair.
2.CHECK FOR EXHAUST SYSTEM CLOGGING
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
OK or NG
OK - GO TO 3.
NG - Repair or replace it.
3.PERFORM POWER BALANCE TEST
With CONSULT-III
1. Perform "POWER BALANCE" in "ACTIVE TEST" mode.
2. Is there any cylinder which does not produce a momentary engine speed drop?
Without CONSULT-III
When disconnecting each fuel injector harness connector one at a time, is there any cylinder which does not produce a momentary engine speed
drop?
Yes or No
Yes - GO TO 4.
No - GO TO 7.
4.CHECK FUEL INJECTOR
Does each fuel injector make an operating sound at idle?
Yes or No
Yes - GO TO 5.
No - Check fuel injector(s) and circuit(s). See: Powertrain Management/Fuel Delivery and Air Induction/Description and Operation/Fuel Injector
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 217
See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Injector/Diagnosis Procedure.
5.CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following procedure.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked.
8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - 0.66 in) between the edge of the spark plug and grounded metal portion as
shown in the figure.
11. Crank engine for about 3 seconds, and check whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
CAUTION:
- During the operation, always stay 0.5 m (1.6 ft) or more away from the spark plug and the ignition coil. Be careful not to get an electrical
shock while checking, because the electrical discharge voltage becomes
20kV or more.
- It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is malfunctioning.
OK or NG
OK - GO TO 9.
NG - GO TO 6.
6.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a known-good spark plug.
3. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
OK or NG
OK - GO TO 7.
NG - Check ignition coil, power transistor and their circuits. See: Powertrain Management/Computers and Control Systems/Description and
Operation/Ignition Signal See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 218
Diagnostics/Ignition Signal/Diagnosis Procedure.
7.CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
OK or NG
OK - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
NG - 1. Repair or clean spark plug.
2. GO TO 8.
8.CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded portion.
Spark should be generated.
OK or NG
OK - INSPECTION END
NG - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
9.CHECK COMPRESSION PRESSURE
Check compression pressure. See: Engine, Cooling and Exhaust/Engine/Compression Check/Testing and Inspection.
OK or NG
OK - GO TO 10.
NG - Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
10.CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.
3. Install fuel pressure gauge and check fuel pressure. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel
Pressure/Testing and Inspection.
At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)
OK or NG
OK - GO TO 12.
NG - GO TO 11.
11.DETECT MALFUNCTIONING PART
Check the following.
- Fuel pump and circuit ( See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Pump.)
- [Flexible Fuel Vehicle]
FPCM and circuit ( See: P1220.)
- Fuel pressure regulator ( See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.)
- Fuel lines
- Fuel filter for clogging
- Repair or replace.
12.CHECK IGNITION TIMING
Check the following items. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and
Diagnostic Overview/Basic Inspection.
OK or NG
OK - GO TO 13.
NG - Follow the See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 219
Overview/Basic Inspection.
13.CHECK A/F SENSOR 1 INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to Wiring Diagram.
Continuity should exist.
5. Check harness continuity between the following terminals and ground. Refer to Wiring Diagram.
Continuity should not exist.
6. Also check harness for short to power.
OK or NG
OK - GO TO 14.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
14.CHECK A/F SENSOR 1 HEATER
See: P0031.
OK or NG
OK - GO TO 16.
NG - GO TO 15.
15.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:
- Discard any air fuel ratio (A/F) sensor which has been dropped from a height of more than 0.5 m (1.6 ft) onto a hard surface such as a
concrete floor; use a new one.
- Before installing new air fuel ratio (A/F) sensor, clean exhaust system threads (using Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12) and approved anti-seize lubricant.
- INSPECTION END
16.CHECK MASS AIR FLOW SENSOR
With CONSULT-III
Check mass air flow sensor signal in "DATA MONITOR" mode with CONSULT-III.
With GST
Check mass air flow sensor signal in Service $01 with GST.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 220
OK or NG
OK - GO TO 17.
NG - Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or ground. See: P0101 See: P0101 See:
P0101.
17.CHECK SYMPTOM MATRIX CHART
Check items on the rough idle symptom in See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Symptom
Related Diagnostic Procedures.
OK or NG
OK - GO TO 18.
NG - Repair or replace.
18.ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memory after performing the tests. See: .
- GO TO 19.
19.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0307
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
On Board Diagnosis Logic
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft position (CKP) sensor (POS)
signal to vary, ECM can determine that a misfire is occurring.
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Three Way Catalyst Damage)
On the 1st trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to overheating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only light when the misfire is detected on a
second trip. During this condition, the ECM monitors the CKP sensor signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
DTC Confirmation Procedure
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 221
CAUTION:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when driving.
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Restart engine and let it idle for about 15 minutes.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to See: P0300.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine and drive the vehicle under the similar conditions to (1st trip) Freeze Frame Data for a certain time. Refer to the table below.
Hold the accelerator pedal as steady as possible.
The similar conditions to (1st trip) Freeze Frame Data means the vehicle operation that the following conditions should be satisfied at the same
time.
The time to driving varies according to the engine speed in the freeze frame data.
Diagnosis Procedure
1.CHECK FOR INTAKE AIR LEAK AND PCV HOSE
1. Start engine and run it at idle speed.
2. Listen for the sound of the intake air leak.
3. Check PCV hose connection.
OK or NG
OK - GO TO 2.
NG - Discover air leak location and repair.
2.CHECK FOR EXHAUST SYSTEM CLOGGING
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
OK or NG
OK - GO TO 3.
NG - Repair or replace it.
3.PERFORM POWER BALANCE TEST
With CONSULT-III
1. Perform "POWER BALANCE" in "ACTIVE TEST" mode.
2. Is there any cylinder which does not produce a momentary engine speed drop?
Without CONSULT-III
When disconnecting each fuel injector harness connector one at a time, is there any cylinder which does not produce a momentary engine speed
drop?
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 222
Yes or No
Yes - GO TO 4.
No - GO TO 7.
4.CHECK FUEL INJECTOR
Does each fuel injector make an operating sound at idle?
Yes or No
Yes - GO TO 5.
No - Check fuel injector(s) and circuit(s). See: Powertrain Management/Fuel Delivery and Air Induction/Description and Operation/Fuel Injector
See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Injector/Diagnosis Procedure.
5.CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following procedure.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked.
8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - 0.66 in) between the edge of the spark plug and grounded metal portion as
shown in the figure.
11. Crank engine for about 3 seconds, and check whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
CAUTION:
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 223
- During the operation, always stay 0.5 m (1.6 ft) or more away from the spark plug and the ignition coil. Be careful not to get an electrical
shock while checking, because the electrical discharge voltage becomes
20kV or more.
- It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is malfunctioning.
OK or NG
OK - GO TO 9.
NG - GO TO 6.
6.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a known-good spark plug.
3. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
OK or NG
OK - GO TO 7.
NG - Check ignition coil, power transistor and their circuits. See: Powertrain Management/Computers and Control Systems/Description and
Operation/Ignition Signal See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General
Diagnostics/Ignition Signal/Diagnosis Procedure.
7.CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
OK or NG
OK - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
NG - 1. Repair or clean spark plug.
2. GO TO 8.
8.CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded portion.
Spark should be generated.
OK or NG
OK - INSPECTION END
NG - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
9.CHECK COMPRESSION PRESSURE
Check compression pressure. See: Engine, Cooling and Exhaust/Engine/Compression Check/Testing and Inspection.
OK or NG
OK - GO TO 10.
NG - Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
10.CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.
3. Install fuel pressure gauge and check fuel pressure. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel
Pressure/Testing and Inspection.
At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)
OK or NG
OK - GO TO 12.
NG - GO TO 11.
11.DETECT MALFUNCTIONING PART
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 224
Check the following.
- Fuel pump and circuit ( See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Pump.)
- [Flexible Fuel Vehicle]
FPCM and circuit ( See: P1220.)
- Fuel pressure regulator ( See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.)
- Fuel lines
- Fuel filter for clogging
- Repair or replace.
12.CHECK IGNITION TIMING
Check the following items. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and
Diagnostic Overview/Basic Inspection.
OK or NG
OK - GO TO 13.
NG - Follow the See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Basic Inspection.
13.CHECK A/F SENSOR 1 INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to Wiring Diagram.
Continuity should exist.
5. Check harness continuity between the following terminals and ground. Refer to Wiring Diagram.
Continuity should not exist.
6. Also check harness for short to power.
OK or NG
OK - GO TO 14.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
14.CHECK A/F SENSOR 1 HEATER
See: P0031.
OK or NG
OK - GO TO 16.
NG - GO TO 15.
15.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 225
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:
- Discard any air fuel ratio (A/F) sensor which has been dropped from a height of more than 0.5 m (1.6 ft) onto a hard surface such as a
concrete floor; use a new one.
- Before installing new air fuel ratio (A/F) sensor, clean exhaust system threads (using Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12) and approved anti-seize lubricant.
- INSPECTION END
16.CHECK MASS AIR FLOW SENSOR
With CONSULT-III
Check mass air flow sensor signal in "DATA MONITOR" mode with CONSULT-III.
With GST
Check mass air flow sensor signal in Service $01 with GST.
OK or NG
OK - GO TO 17.
NG - Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or ground. See: P0101 See: P0101 See:
P0101.
17.CHECK SYMPTOM MATRIX CHART
Check items on the rough idle symptom in See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Symptom
Related Diagnostic Procedures.
OK or NG
OK - GO TO 18.
NG - Repair or replace.
18.ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memory after performing the tests. See: .
- GO TO 19.
19.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0308
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
On Board Diagnosis Logic
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft position (CKP) sensor (POS)
signal to vary, ECM can determine that a misfire is occurring.
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Three Way Catalyst Damage)
On the 1st trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to overheating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only light when the misfire is detected on a
second trip. During this condition, the ECM monitors the CKP sensor signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 226
DTC Confirmation Procedure
CAUTION:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when driving.
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Restart engine and let it idle for about 15 minutes.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to See: P0300.
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine and drive the vehicle under the similar conditions to (1st trip) Freeze Frame Data for a certain time. Refer to the table below.
Hold the accelerator pedal as steady as possible.
The similar conditions to (1st trip) Freeze Frame Data means the vehicle operation that the following conditions should be satisfied at the same
time.
The time to driving varies according to the engine speed in the freeze frame data.
Diagnosis Procedure
1.CHECK FOR INTAKE AIR LEAK AND PCV HOSE
1. Start engine and run it at idle speed.
2. Listen for the sound of the intake air leak.
3. Check PCV hose connection.
OK or NG
OK - GO TO 2.
NG - Discover air leak location and repair.
2.CHECK FOR EXHAUST SYSTEM CLOGGING
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 227
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
OK or NG
OK - GO TO 3.
NG - Repair or replace it.
3.PERFORM POWER BALANCE TEST
With CONSULT-III
1. Perform "POWER BALANCE" in "ACTIVE TEST" mode.
2. Is there any cylinder which does not produce a momentary engine speed drop?
Without CONSULT-III
When disconnecting each fuel injector harness connector one at a time, is there any cylinder which does not produce a momentary engine speed
drop?
Yes or No
Yes - GO TO 4.
No - GO TO 7.
4.CHECK FUEL INJECTOR
Does each fuel injector make an operating sound at idle?
Yes or No
Yes - GO TO 5.
No - Check fuel injector(s) and circuit(s). See: Powertrain Management/Fuel Delivery and Air Induction/Description and Operation/Fuel Injector
See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Injector/Diagnosis Procedure.
5.CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following procedure.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 228
8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - 0.66 in) between the edge of the spark plug and grounded metal portion as
shown in the figure.
11. Crank engine for about 3 seconds, and check whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
CAUTION:
- During the operation, always stay 0.5 m (1.6 ft) or more away from the spark plug and the ignition coil. Be careful not to get an electrical
shock while checking, because the electrical discharge voltage becomes
20kV or more.
- It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is malfunctioning.
OK or NG
OK - GO TO 9.
NG - GO TO 6.
6.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a known-good spark plug.
3. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
OK or NG
OK - GO TO 7.
NG - Check ignition coil, power transistor and their circuits. See: Powertrain Management/Computers and Control Systems/Description and
Operation/Ignition Signal See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General
Diagnostics/Ignition Signal/Diagnosis Procedure.
7.CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
OK or NG
OK - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
NG - 1. Repair or clean spark plug.
2. GO TO 8.
8.CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded portion.
Spark should be generated.
OK or NG
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 229
OK - INSPECTION END
NG - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
9.CHECK COMPRESSION PRESSURE
Check compression pressure. See: Engine, Cooling and Exhaust/Engine/Compression Check/Testing and Inspection.
OK or NG
OK - GO TO 10.
NG - Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
10.CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.
3. Install fuel pressure gauge and check fuel pressure. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel
Pressure/Testing and Inspection.
At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)
OK or NG
OK - GO TO 12.
NG - GO TO 11.
11.DETECT MALFUNCTIONING PART
Check the following.
- Fuel pump and circuit ( See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Pump.)
- [Flexible Fuel Vehicle]
FPCM and circuit ( See: P1220.)
- Fuel pressure regulator ( See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Testing and
Inspection.)
- Fuel lines
- Fuel filter for clogging
- Repair or replace.
12.CHECK IGNITION TIMING
Check the following items. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and
Diagnostic Overview/Basic Inspection.
OK or NG
OK - GO TO 13.
NG - Follow the See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Basic Inspection.
13.CHECK A/F SENSOR 1 INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to Wiring Diagram.
Continuity should exist.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 230
5. Check harness continuity between the following terminals and ground. Refer to Wiring Diagram.
Continuity should not exist.
6. Also check harness for short to power.
OK or NG
OK - GO TO 14.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
14.CHECK A/F SENSOR 1 HEATER
See: P0031.
OK or NG
OK - GO TO 16.
NG - GO TO 15.
15.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:
- Discard any air fuel ratio (A/F) sensor which has been dropped from a height of more than 0.5 m (1.6 ft) onto a hard surface such as a
concrete floor; use a new one.
- Before installing new air fuel ratio (A/F) sensor, clean exhaust system threads (using Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12) and approved anti-seize lubricant.
- INSPECTION END
16.CHECK MASS AIR FLOW SENSOR
With CONSULT-III
Check mass air flow sensor signal in "DATA MONITOR" mode with CONSULT-III.
With GST
Check mass air flow sensor signal in Service $01 with GST.
OK or NG
OK - GO TO 17.
NG - Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or ground. See: P0101 See: P0101 See:
P0101.
17.CHECK SYMPTOM MATRIX CHART
Check items on the rough idle symptom in See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Symptom
Related Diagnostic Procedures.
OK or NG
OK - GO TO 18.
NG - Repair or replace.
18.ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memory after performing the tests. See: .
- GO TO 19.
19.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0327
P0327, P0328, P0332, P0333 KS
Component Description
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 231
The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the
cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the ECM.
On Board Diagnosis Logic
The MIL will not light up for these self-diagnoses.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.
1. Start engine and run it for at least 5 seconds at idle speed.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to See: P0327.
Diagnosis Procedure
1.CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check resistance between ECM terminals 15, 36 and ground. Refer to Wiring Diagram.
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 MOhm(s).
Resistance: Approximately 532 - 588 kohms [at 20癈 (68癋)]
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 5.
NG - GO TO 2.
2.CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 232
1. Disconnect knock sensor harness connector.
2. Check harness continuity between ECM terminal 15 and knock sensor (bank1) terminal 1, ECM terminal 36 and knock sensor
(bank 2) terminal 1. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F26, F101
- Harness for open or short between ECM and knock sensor
- Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK KNOCK SENSOR
See: P0327.
OK or NG
OK - GO TO 5.
NG - Replace malfunctioning knock sensor.
5.CHECK GROUND CONNECTIONS
1. Loosen and retighten three ground screws on the body. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 6.
NG - Repair or replace ground connections.
6.CHECK KNOCK SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT
1. Disconnect knock sensor harness connector.
2. Check harness continuity between knock sensor terminal 2 and ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK - GO TO 8.
NG - GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F26, F101
- Harness connectors F14, E5
- Harness for open or short between knock sensor terminal 2 and ground
- Repair open circuit or short power in harness or connectors.
8.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 233
Component Inspection
KNOCK SENSOR
Check resistance between knock sensor terminal 1 and ground.
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 MOhm(s).
Resistance: Approximately 532 - 588 kohms [at 20癈 (68癋)]
CAUTION:
Do not use any knock sensors that have been dropped or physically damaged. Use only new ones.
P0328
P0327, P0328, P0332, P0333 KS
Component Description
The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the
cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the ECM.
On Board Diagnosis Logic
The MIL will not light up for these self-diagnoses.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 234
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.
1. Start engine and run it for at least 5 seconds at idle speed.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to See: P0327.
Diagnosis Procedure
1.CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check resistance between ECM terminals 15, 36 and ground. Refer to Wiring Diagram.
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 MOhm(s).
Resistance: Approximately 532 - 588 kohms [at 20癈 (68癋)]
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 5.
NG - GO TO 2.
2.CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect knock sensor harness connector.
2. Check harness continuity between ECM terminal 15 and knock sensor (bank1) terminal 1, ECM terminal 36 and knock sensor
(bank 2) terminal 1. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F26, F101
- Harness for open or short between ECM and knock sensor
- Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK KNOCK SENSOR
See: P0327.
OK or NG
OK - GO TO 5.
NG - Replace malfunctioning knock sensor.
5.CHECK GROUND CONNECTIONS
1. Loosen and retighten three ground screws on the body. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/Ground Inspection.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 235
OK or NG
OK - GO TO 6.
NG - Repair or replace ground connections.
6.CHECK KNOCK SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT
1. Disconnect knock sensor harness connector.
2. Check harness continuity between knock sensor terminal 2 and ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK - GO TO 8.
NG - GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F26, F101
- Harness connectors F14, E5
- Harness for open or short between knock sensor terminal 2 and ground
- Repair open circuit or short power in harness or connectors.
8.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
KNOCK SENSOR
Check resistance between knock sensor terminal 1 and ground.
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 MOhm(s).
Resistance: Approximately 532 - 588 kohms [at 20癈 (68癋)]
CAUTION:
Do not use any knock sensors that have been dropped or physically damaged. Use only new ones.
P0332
P0327, P0328, P0332, P0333 KS
Component Description
The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the
cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the ECM.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 236
On Board Diagnosis Logic
The MIL will not light up for these self-diagnoses.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.
1. Start engine and run it for at least 5 seconds at idle speed.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to See: P0327.
Diagnosis Procedure
1.CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check resistance between ECM terminals 15, 36 and ground. Refer to Wiring Diagram.
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 MOhm(s).
Resistance: Approximately 532 - 588 kohms [at 20癈 (68癋)]
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 5.
NG - GO TO 2.
2.CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect knock sensor harness connector.
2. Check harness continuity between ECM terminal 15 and knock sensor (bank1) terminal 1, ECM terminal 36 and knock sensor
(bank 2) terminal 1. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 4.
NG - GO TO 3.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 237
3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F26, F101
- Harness for open or short between ECM and knock sensor
- Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK KNOCK SENSOR
See: P0327.
OK or NG
OK - GO TO 5.
NG - Replace malfunctioning knock sensor.
5.CHECK GROUND CONNECTIONS
1. Loosen and retighten three ground screws on the body. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 6.
NG - Repair or replace ground connections.
6.CHECK KNOCK SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT
1. Disconnect knock sensor harness connector.
2. Check harness continuity between knock sensor terminal 2 and ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK - GO TO 8.
NG - GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F26, F101
- Harness connectors F14, E5
- Harness for open or short between knock sensor terminal 2 and ground
- Repair open circuit or short power in harness or connectors.
8.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
KNOCK SENSOR
Check resistance between knock sensor terminal 1 and ground.
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 MOhm(s).
Resistance: Approximately 532 - 588 kohms [at 20癈 (68癋)]
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 238
CAUTION:
Do not use any knock sensors that have been dropped or physically damaged. Use only new ones.
P0333
P0327, P0328, P0332, P0333 KS
Component Description
The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the
cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the ECM.
On Board Diagnosis Logic
The MIL will not light up for these self-diagnoses.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.
1. Start engine and run it for at least 5 seconds at idle speed.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to See: P0327.
Diagnosis Procedure
1.CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check resistance between ECM terminals 15, 36 and ground. Refer to Wiring Diagram.
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 MOhm(s).
Resistance: Approximately 532 - 588 kohms [at 20癈 (68癋)]
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 5.
NG - GO TO 2.
2.CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 239
1. Disconnect knock sensor harness connector.
2. Check harness continuity between ECM terminal 15 and knock sensor (bank1) terminal 1, ECM terminal 36 and knock sensor
(bank 2) terminal 1. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F26, F101
- Harness for open or short between ECM and knock sensor
- Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK KNOCK SENSOR
See: P0327.
OK or NG
OK - GO TO 5.
NG - Replace malfunctioning knock sensor.
5.CHECK GROUND CONNECTIONS
1. Loosen and retighten three ground screws on the body. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 6.
NG - Repair or replace ground connections.
6.CHECK KNOCK SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT
1. Disconnect knock sensor harness connector.
2. Check harness continuity between knock sensor terminal 2 and ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK - GO TO 8.
NG - GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F26, F101
- Harness connectors F14, E5
- Harness for open or short between knock sensor terminal 2 and ground
- Repair open circuit or short power in harness or connectors.
8.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 240
Component Inspection
KNOCK SENSOR
Check resistance between knock sensor terminal 1 and ground.
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 MOhm(s).
Resistance: Approximately 532 - 588 kohms [at 20癈 (68癋)]
CAUTION:
Do not use any knock sensors that have been dropped or physically damaged. Use only new ones.
P0335
P0335 CKP SENSOR (POS)
Component Description
The crankshaft position sensor (POS) is located on the A/T assembly facing the gear teeth (cogs) of the signal plate. It detects the fluctuation of
the engine revolution.
The sensor consists of a permanent magnet and Hall IC.
When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change.
The changing gap causes the magnetic field near the sensor to change.
Due to the changing magnetic field, the voltage from the sensor changes.
The ECM receives the voltage signal and detects the fluctuation of the engine revolution.
ECM receives the signals as shown in the figure.
On Board Diagnosis Logic
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 241
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5 V with ignition switch ON.
1. Crank engine for at least 2 seconds and run it for at least 5 seconds at idle speed.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to See: P0335.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK CRANKSHAFT POSITION (CKP) SENSOR (POS) POWER SUPPLY CIRCUIT
1. Disconnect crankshaft position (CKP) sensor (POS) harness connector.
2. Turn ignition switch ON.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 242
3. Check voltage between CKP sensor (POS) terminal 3 and ground with CONSULT-III or tester.
Voltage: Battery voltage
OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F32, E2
- Harness for open or short between crankshaft position sensor (POS) and ECM
- Harness for open or short between crankshaft position sensor (POS) and IPDM E/R
- Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK CKP SENSOR (POS) GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between CKP sensor (POS) terminal 1 and ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK - GO TO 6.
NG - GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F32, E2
- Harness for open or short between crankshaft position sensor (POS) and ground
- Repair open circuit or short to power in harness or connectors.
6.CHECK CKP SENSOR (POS) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 13 and CKP sensor (POS) terminal 2. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 7.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK CRANKSHAFT POSITION SENSOR (POS)
See: P0335.
OK or NG
OK - GO TO 8.
NG - Replace crankshaft position sensor (POS). See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and
Repair/Removal and Replacement/Automatic Transmission
8.CHECK GEAR TOOTH
Visually check for chipping signal plate gear tooth.
OK or NG
OK - GO TO 9.
NG - Replace the signal plate.
9.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
CRANKSHAFT POSITION SENSOR (POS)
1. Loosen the fixing bolt of the sensor.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 243
2. Disconnect crankshaft position sensor (POS) harness connector.
3. Remove the sensor. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and Repair/Removal and
Replacement/Automatic Transmission
4. Visually check the sensor for chipping.
5. Check resistance as shown in the figure.
P0340
P0340 CMP SENSOR (PHASE)
Component Description
The camshaft position sensor (PHASE) senses the protrusion of exhaust valve cam sprocket to identify a particular cylinder. The camshaft
position sensor (PHASE) senses the piston position.
When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor (PHASE) provides various controls of
engine parts instead, utilizing timing of cylinder identification signals.
The sensor consists of a permanent magnet and Hall IC.
When engine is running, the high and low parts of the teeth cause the gap with the sensor to change.
The changing gap causes the magnetic field near the sensor to change.
Due to the changing magnetic field, the voltage from the sensor changes.
ECM receives the signals as shown in the figure.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 244
On Board Diagnosis Logic
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5 V with ignition switch ON.
1. Turn ignition switch ON.
2. Crank engine for at least 2 seconds and run it for at least 5 seconds at idle speed.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to See: P0340.
If 1st trip DTC is not detected, go to next step.
5. Maintaining engine speed at more than 800 rpm for at least 5 seconds.
6. Check 1st trip DTC.
7. If 1st trip DTC is detected, go to See: P0340.
Diagnosis Procedure
1.CHECK STARTING SYSTEM
Turn ignition switch to "START" position.
Yes or No
Yes - GO TO 2.
No - Check starting system. ( See: Starting and Charging/Starting System/Description and Operation/Starting System/System Diagram.)
2.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 3.
NG - Repair or replace ground connections.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 245
3.CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY CIRCUIT
1. Disconnect camshaft position (CMP) sensor (PHASE) (2) harness connector.
- Radiator hose (1)
2. Turn ignition switch ON.
3. Check voltage between CMP sensor (PHASE) terminal 3 and ground with CONSULT-III or tester.
Voltage: Battery voltage
OK or NG
OK - GO TO 5.
NG - GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F32, E2
- Harness for open or short between camshaft position sensor (PHASE) and ECM
- Harness for open or short between camshaft position sensor (PHASE) and IPDM E/R
- Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK CMP SENSOR (PHASE) GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between CMP sensor (PHASE) terminal 1 and ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK - GO TO 7.
NG - GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F32, E2
- Harness for open or short between CMP sensor (PHASE) and ground
- Repair open circuit or short to power in harness or connectors.
7.CHECK CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 14 and CMP sensor (PHASE) terminal 2. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 8.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK CAMSHAFT POSITION SENSOR (PHASE)
See: P0340.
OK or NG
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 246
OK - GO TO 9.
NG - Replace camshaft position sensor (PHASE). See: Engine, Cooling and Exhaust/Engine/Sensors and Switches - Engine/Variable Valve
Timing Actuator Position Sensor/Service and Repair/Intake Valve Timing Control Position Sensor (LH) See: Engine, Cooling and
Exhaust/Engine/Sensors and Switches - Engine/Variable Valve Timing Actuator Position Sensor/Service and Repair/Intake Valve Timing Control
Position Sensor (RH) See: Engine, Cooling and Exhaust/Engine/Sensors and Switches - Engine/Variable Valve Timing Actuator Position
Sensor/Service and Repair/Camshaft Position Sensor (Phase).
9.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
CAMSHAFT POSITION SENSOR (PHASE)
1. Loosen the fixing bolt of the sensor.
2. Disconnect camshaft position sensor (PHASE) harness connector.
3. Remove the sensor.
4. Visually check the sensor for chipping.
5. Check resistance as shown in the figure.
P0420
P0420, P0430 THREE WAY CATALYST FUNCTION
On Board Diagnosis Logic
The ECM monitors the switching frequency ratio of air fuel sensor
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 247
(A/F) sensor 1 heated oxygen sensor 2.
A three way catalyst (manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2.
As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will increase.
When the frequency ratio of air fuel ratio (A/F) sensor 1 and heated oxygen sensor 2 approaches a specified limit value, the three way catalyst
(manifold) malfunction is diagnosed.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
WITH CONSULT-III
TESTING CONDITION:
Do not hold engine speed for more than the specified minutes below.
1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
5. Let engine idle for 1 minute.
6. Make sure that "COOLAN TEMP/S" indicates more than 70癈 (158癋).
If not, warm up engine and go to next step when "COOLAN TEMP/S" indication reaches to 70癈 (158癋).
7. Open engine hood.
8. Select "DTC & SRT CONFIRMATION" then "SRT WORK SUPPORT" mode with CONSULT-III.
9. Rev engine up to 2,000 to 3,000 rpm and hold it for 3 consecutive minutes then release the accelerator pedal completely.
If "INCMP" of "CATALYST" changed to "CMPLT", go to step 12.
10. Wait 5 seconds at idle.
11. Rev engine up to 2,000 to 3,000 rpm and maintain it until "INCMP" of "CATALYST" changes to "CMPLT" (It will take approximately 5
minutes).
If not "CMPLT", stop engine and cool it down to less than 70癈 (158癋) and then retest from step 1.
12. Select "SELF-DIAG RESULTS" mode with CONSULT-III.
13. Confirm that the 1st trip DTC is not detected.
If the 1st trip DTC is detected, go to See: P0420.
Overall Function Check
Use this procedure to check the overall function of the three way catalyst (manifold). During this check, a 1st trip DTC might not be confirmed.
WITH GST
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4. Let engine idle for 1 minute.
5. Open engine hood.
6. Set voltmeter probes between ECM terminals ECM terminals 55
[HO2S2 (bank 1) signal], 74 [HO2S2 (bank 2) signal] and ground.
7. Keep engine speed at 2,500 rpm constant under no load.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 248
8. Make sure that the voltage does not vary for more than 5 seconds.
If the voltage fluctuation cycle takes less than 5 seconds, go to "Diagnosis Procedure".
- 1 cycle: 0.6 - 1.0 to 0 - 0.3 to 0.6 - 1.0
Diagnosis Procedure
1.CHECK EXHAUST SYSTEM
Visually check exhaust tubes and muffler for dent.
OK or NG
OK - GO TO 2.
NG - Repair or replace.
2.CHECK EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before the three way catalyst (manifold).
OK or NG
OK - GO TO 3.
NG - Repair or replace.
3.CHECK INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK - GO TO 4.
NG - Repair or replace.
4.CHECK IGNITION TIMING
Check the following items. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and
Diagnostic Overview/Basic Inspection.
OK or NG
OK - GO TO 5.
NG - Follow the See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Basic Inspection.
5.CHECK FUEL INJECTOR
1. Stop engine and then turn ignition switch ON.
2. Check voltage between ECM terminals 21, 22, 23, 40, 41, 42, 44, 63 and ground with CONSULT-III or tester. Refer to Wiring Diagram for
fuel injector, See: Powertrain Management/Computers and Control Systems/Diagrams/Electrical Diagrams.
Battery voltage should exist.
OK or NG
OK - GO TO 6.
NG - Perform See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Injector/Diagnosis Procedure.
6.CHECK FUNCTION OF IGNITION COIL-I
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 249
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following procedure.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked.
8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - 0.66 in) between the edge of the spark plug and grounded metal portion as
shown in the figure.
11. Crank engine for about 3 seconds, and check whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
CAUTION:
- During the operation, always stay 0.5 m (1.6 ft) or more away from spark plug and the ignition coil. Be careful not to get an electrical shock
while checking, because the electrical discharge voltage becomes 20 kV or more.
- It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is malfunctioning.
OK or NG
OK - GO TO 10.
NG - GO TO 7.
7.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a known-good spark plug.
3. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
OK or NG
OK - GO TO 8.
NG - Check ignition coil, power transistor and their circuits. See: Powertrain Management/Computers and Control Systems/Diagrams/Electrical
Diagrams.
8.CHECK SPARK PLUG
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 250
Check the initial spark plug for fouling, etc.
OK or NG
OK - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
NG - 1. Repair or clean spark plug.
2. GO TO 9.
9.CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded portion.
Spark should be generated.
OK or NG
OK - INSPECTION END
NG - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
10.CHECK FUEL INJECTOR
1. Turn ignition switch OFF.
2. Remove fuel injector assembly. See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Rail/Service and Repair/Removal And
Installation.
Keep fuel hose and all fuel injectors connected to fuel injector gallery.
3. Disconnect all ignition coil harness connectors.
4. Reconnect all fuel injector harness connectors disconnected.
5. Turn ignition switch ON.
Make sure fuel does not drip from fuel injector.
OK or NG
OK (Does not drip.)-GO TO 11.
NG (Drips.)-Replace the fuel injector(s) from which fuel is dripping.
11.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
Trouble is fixed.-INSPECTION END
Trouble is not fixed.-Replace three way catalyst assembly.
P0430
P0420, P0430 THREE WAY CATALYST FUNCTION
On Board Diagnosis Logic
The ECM monitors the switching frequency ratio of air fuel sensor
(A/F) sensor 1 heated oxygen sensor 2.
A three way catalyst (manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2.
As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will increase.
When the frequency ratio of air fuel ratio (A/F) sensor 1 and heated oxygen sensor 2 approaches a specified limit value, the three way catalyst
(manifold) malfunction is diagnosed.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 251
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
WITH CONSULT-III
TESTING CONDITION:
Do not hold engine speed for more than the specified minutes below.
1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
5. Let engine idle for 1 minute.
6. Make sure that "COOLAN TEMP/S" indicates more than 70癈 (158癋).
If not, warm up engine and go to next step when "COOLAN TEMP/S" indication reaches to 70癈 (158癋).
7. Open engine hood.
8. Select "DTC & SRT CONFIRMATION" then "SRT WORK SUPPORT" mode with CONSULT-III.
9. Rev engine up to 2,000 to 3,000 rpm and hold it for 3 consecutive minutes then release the accelerator pedal completely.
If "INCMP" of "CATALYST" changed to "CMPLT", go to step 12.
10. Wait 5 seconds at idle.
11. Rev engine up to 2,000 to 3,000 rpm and maintain it until "INCMP" of "CATALYST" changes to "CMPLT" (It will take approximately 5
minutes).
If not "CMPLT", stop engine and cool it down to less than 70癈 (158癋) and then retest from step 1.
12. Select "SELF-DIAG RESULTS" mode with CONSULT-III.
13. Confirm that the 1st trip DTC is not detected.
If the 1st trip DTC is detected, go to See: P0420.
Overall Function Check
Use this procedure to check the overall function of the three way catalyst (manifold). During this check, a 1st trip DTC might not be confirmed.
WITH GST
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4. Let engine idle for 1 minute.
5. Open engine hood.
6. Set voltmeter probes between ECM terminals ECM terminals 55
[HO2S2 (bank 1) signal], 74 [HO2S2 (bank 2) signal] and ground.
7. Keep engine speed at 2,500 rpm constant under no load.
8. Make sure that the voltage does not vary for more than 5 seconds.
If the voltage fluctuation cycle takes less than 5 seconds, go to "Diagnosis Procedure".
- 1 cycle: 0.6 - 1.0 to 0 - 0.3 to 0.6 - 1.0
Diagnosis Procedure
1.CHECK EXHAUST SYSTEM
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 252
Visually check exhaust tubes and muffler for dent.
OK or NG
OK - GO TO 2.
NG - Repair or replace.
2.CHECK EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before the three way catalyst (manifold).
OK or NG
OK - GO TO 3.
NG - Repair or replace.
3.CHECK INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK - GO TO 4.
NG - Repair or replace.
4.CHECK IGNITION TIMING
Check the following items. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and
Diagnostic Overview/Basic Inspection.
OK or NG
OK - GO TO 5.
NG - Follow the See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Basic Inspection.
5.CHECK FUEL INJECTOR
1. Stop engine and then turn ignition switch ON.
2. Check voltage between ECM terminals 21, 22, 23, 40, 41, 42, 44, 63 and ground with CONSULT-III or tester. Refer to Wiring Diagram for
fuel injector, See: Powertrain Management/Computers and Control Systems/Diagrams/Electrical Diagrams.
Battery voltage should exist.
OK or NG
OK - GO TO 6.
NG - Perform See: Powertrain Management/Fuel Delivery and Air Induction/Testing and Inspection/Fuel Injector/Diagnosis Procedure.
6.CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 253
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following procedure.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked.
8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - 0.66 in) between the edge of the spark plug and grounded metal portion as
shown in the figure.
11. Crank engine for about 3 seconds, and check whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
CAUTION:
- During the operation, always stay 0.5 m (1.6 ft) or more away from spark plug and the ignition coil. Be careful not to get an electrical shock
while checking, because the electrical discharge voltage becomes 20 kV or more.
- It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is malfunctioning.
OK or NG
OK - GO TO 10.
NG - GO TO 7.
7.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a known-good spark plug.
3. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
OK or NG
OK - GO TO 8.
NG - Check ignition coil, power transistor and their circuits. See: Powertrain Management/Computers and Control Systems/Diagrams/Electrical
Diagrams.
8.CHECK SPARK PLUG
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 254
Check the initial spark plug for fouling, etc.
OK or NG
OK - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
NG - 1. Repair or clean spark plug.
2. GO TO 9.
9.CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded portion.
Spark should be generated.
OK or NG
OK - INSPECTION END
NG - Replace malfunctioning spark plug(s) with standard type one(s). For spark plug type, See: Engine, Cooling and Exhaust/Engine/Tune-up
and Engine Performance Checks/Spark Plug/Service and Repair.
10.CHECK FUEL INJECTOR
1. Turn ignition switch OFF.
2. Remove fuel injector assembly. See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Rail/Service and Repair/Removal And
Installation.
Keep fuel hose and all fuel injectors connected to fuel injector gallery.
3. Disconnect all ignition coil harness connectors.
4. Reconnect all fuel injector harness connectors disconnected.
5. Turn ignition switch ON.
Make sure fuel does not drip from fuel injector.
OK or NG
OK (Does not drip.)-GO TO 11.
NG (Drips.)-Replace the fuel injector(s) from which fuel is dripping.
11.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
Trouble is fixed.-INSPECTION END
Trouble is not fixed.-Replace three way catalyst assembly.
P0441
P0441 EVAP CONTROL SYSTEM
System Description
NOTE:
If DTC P0441 is displayed with other DTC such as P2122, P2123, P2127, P2128 or P2138, first perform trouble diagnosis for other DTC.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 255
In this evaporative emission (EVAP) control system, purge flow occurs during non-closed throttle conditions.
Purge volume is related to air intake volume. Under normal purge conditions (non-closed throttle), the EVAP canister purge volume control
solenoid valve is open to admit purge flow. Purge flow exposes the EVAP control system pressure sensor to intake manifold vacuum.
On Board Diagnosis Logic
Under normal conditions (non-closed throttle), sensor output voltage indicates if pressure drop and purge flow are adequate. If not, a malfunction
is determined.
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Always perform test at a temperature of 5癈 (41癋) or more.
WITH CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and let it idle for at least 70 seconds.
4. Select "PURG FLOW P0441" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT-III.
5. Touch "START".
If "COMPLETED" is displayed, go to step 7.
6. When the following conditions are met, "TESTING" will be displayed on the CONSULT-III screen. Maintain the conditions continuously
until "TESTING" changes to "COMPLETED". (It will take at least 35 seconds.)
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 256
If "TESTING" is not changed for a long time, retry from step 2.
7. Make sure that "OK" is displayed after touching "SELF-DIAG RESULTS". If "NG" is displayed, See: P0441.
Overall Function Check
Use this procedure to check the overall monitoring function of the EVAP control system purge flow monitoring.
During this check, a 1st trip DTC might not be confirmed.
WITH GST
1. Lift up drive wheels.
2. Start engine (VDC switch OFF) and warm it up to normal operating temperature.
3. Turn ignition switch OFF, wait at least 10 seconds.
4. Start engine and wait at least 70 seconds.
5. Set voltmeter probes to ECM terminals 32 (EVAP control system pressure sensor signal) and ground.
6. Check EVAP control system pressure sensor value at idle speed and note it.
7. Establish and maintain the following conditions for at least 1 minute.
8. Verify that EVAP control system pressure sensor value stays 0.1 V less than the value at idle speed (measured at step 6) for at least 1 second.
9. If NG, go to See: P0441.
Diagnosis Procedure
1.CHECK EVAP CANISTER
1. Turn ignition switch OFF.
2. Check EVAP canister for cracks.
OK or NG
OK (With CONSULT-III)-GO TO 2.
OK (Without CONSULT-III)-GO TO 3.
NG - Replace EVAP canister.
2.CHECK PURGE FLOW
With CONSULT-III
1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port and install vacuum gauge.
For the location of EVAP service port, See: Powertrain Management/Emission Control Systems/Evaporative Emissions System/Description
and Operation/Evaporative Emission System.
2. Start engine and let it idle.
3. Select "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-III.
4. Rev engine up to 2,000 rpm.
5. Touch "Qd" and "Qu" on CONSULT-III screen to adjust "PURG VOL CONT/V" opening and check vacuum existence.
OK or NG
OK - GO TO 7.
NG - GO TO 4.
3.CHECK PURGE FLOW
Without CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
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3. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port and install vacuum gauge.
For the location of EVAP service port, See: Powertrain Management/Emission Control Systems/Evaporative Emissions System/Description
and Operation/Evaporative Emission System.
4. Start engine and let it idle.
Do not depress accelerator pedal even slightly.
5. Check vacuum gauge indication before 60 seconds passed after starting engine.
Vacuum should not exist.
6. Revving engine up to 2,000 rpm after 100 seconds passed after starting engine.
Vacuum should exist.
OK or NG
OK - GO TO 7.
NG - GO TO 4.
4.CHECK EVAP PURGE LINE
1. Turn ignition switch OFF.
2. Check EVAP purge line for improper connection or disconnection. See: Powertrain Management/Emission Control Systems/Evaporative
Emissions System/Description and Operation/Evaporative Emission System.
OK or NG
OK - GO TO 5.
NG - Repair it.
5.CHECK EVAP PURGE HOSE AND PURGE PORT
1. Disconnect purge hoses connected to EVAP service port A and
EVAP canister purge volume control solenoid valve B.
2. Blow air into each hose and EVAP purge port C.
3. Check that air flows freely.
OK or NG
OK (With CONSULT-III)-GO TO 6.
OK (Without CONSULT-III)-GO TO 7.
NG - Repair or clean hoses and/or purge port.
6.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-III
1. Start engine.
2. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-III. Check that engine speed varies according to the valve
opening.
OK or NG
OK - GO TO 8.
NG - GO TO 7.
7.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
See: P0444.
OK or NG
OK - GO TO 8.
NG - Replace EVAP canister purge volume control solenoid valve.
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8.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
2. Check connectors for water.
Water should not exist.
OK or NG
OK - GO TO 9.
NG - Replace EVAP control system pressure sensor.
9.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION
Refer to DTC Confirmation Procedure for DTC P0452, See: P0452 and P0453 See: P0453.
OK or NG
OK - GO TO 10.
NG - Replace EVAP control system pressure sensor.
10.CHECK RUBBER TUBE FOR CLOGGING
1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging.
OK or NG
OK - GO TO 11.
NG - Clean the rubber tube using an air blower.
11.CHECK EVAP CANISTER VENT CONTROL VALVE
See: P0447.
OK or NG
OK - GO TO 12.
NG - Replace EVAP canister vent control valve.
12.CHECK EVAP PURGE LINE
Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks. See: Powertrain Management/Emission Control
Systems/Evaporative Emissions System/Description and Operation/Evaporative Emission System.
OK or NG
OK - GO TO 13.
NG - Replace it.
13.CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
- GO TO 14.
14.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0442
P0442 EVAP CONTROL SYSTEM
On Board Diagnosis Logic
This diagnosis detects leaks in the EVAP purge line using engine intake manifold vacuum.
If pressure does not increase, the ECM will check for leaks in the line between the fuel tank and EVAP canister purge volume control solenoid
valve, under the following "Vacuum test" conditions.
The EVAP canister vent control valve is closed to shut the EVAP purge line off. The EVAP canister purge volume control solenoid valve will
then be opened to depressurize the EVAP purge line using intake manifold vacuum. After this occurs, the EVAP canister purge volume control
solenoid valve will be closed.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 259
CAUTION:
- Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the
MIL may come on.
- If the fuel filler cap is not tightened properly, the MIL may come on.
- Use only a genuine NISSAN rubber tube as a replacement.
DTC Confirmation Procedure
NOTE:
- If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
- Perform "DTC WORK SUPPORT" when the fuel level is between 1/4 and 3/4 full, and vehicle is placed on flat level surface.
- Always perform test at a temperature of 0 to 30癈 (32 to 86癋).
WITH CONSULT-III
1. Turn ignition switch ON.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-III.
4. Make sure that the following conditions are met.
COOLAN TEMP/S: 0 - 70癈 (32 - 158癋)
INT/A TEMP SE: 0 - 30癈 (32 - 86癋)
5. Select "EVP SML LEAK P0442/P1442" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT-III.
Follow the instruction displayed.
NOTE:
If the engine speed cannot be maintained within the range displayed on the CONSULT-III screen, go to See: Powertrain Management/Computers
and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Basic Inspection.
6. Make sure that "OK" is displayed.
If "NG" is displayed, See: P0442.
NOTE:
Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid valve properly.
WITH GST
NOTE:
Be sure to read the explanation of See: before driving vehicle.
1. Start engine.
2. Drive vehicle according to See: .
3. Stop vehicle.
4. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
5. Select Service $07 with GST.
- If P0442 is displayed on the screen, go to See: P0442.
- If P0441 is displayed on the screen, go to See: P0441.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 260
Diagnosis Procedure
1.CHECK FUEL FILLER CAP DESIGN
1. Turn ignition switch OFF.
2. Check for genuine NISSAN fuel filler cap design.
OK or NG
OK - GO TO 2.
NG - Replace with genuine NISSAN fuel filler cap.
2.CHECK FUEL FILLER CAP INSTALLATION
Check that the cap is tightened properly by rotating the cap clockwise.
OK or NG
OK - GO TO 3.
NG - 1. Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
2. Retighten until ratcheting sound is heard.
3.CHECK FUEL FILLER CAP FUNCTION
Check for air releasing sound while opening the fuel filler cap.
OK or NG
OK - GO TO 5.
NG - GO TO 4.
4.CHECK FUEL TANK VACUUM RELIEF VALVE
See: P0442.
OK or NG
OK - GO TO 5.
NG - Replace fuel filler cap with a genuine one.
5.INSTALL THE PRESSURE PUMP
To locate the EVAP leak, install EVAP service port adapter (commercial service tool) and pressure pump to EVAP service port securely.
NOTE:
Improper installation of the EVAP service port adapter to the
EVAP service port may cause leaking.
With CONSULT-III-GO TO 6.
Without CONSULT-III-GO TO 7.
6.CHECK FOR EVAP LEAK
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 261
With CONSULT-III
1. Turn ignition switch ON.
2. Select "EVAP SYSTEM CLOSE" of "WORK SUPPORT" mode with CONSULT-III.
3. Touch "START" and apply pressure into the EVAP line until the pressure indicator reaches the middle of the bar graph.
CAUTION:
- Never use compressed air or a high pressure pump.
- Do not exceed 4.12 kPa (0.042 kg/cm2, 0.6 psi) of pressure in the system.
4. Using EVAP leak detector, locate the EVAP leak. For the leak detector, refer to the instruction manual for more details. See: Powertrain
Management/Emission Control Systems/Evaporative Emissions System/Description and Operation/Evaporative Emission System.
OK or NG
OK - GO TO 8.
NG - Repair or replace.
7.CHECK FOR EVAP LEAK
Without CONSULT-III
1. Turn ignition switch OFF.
2. Apply 12 volts DC to EVAP canister vent control valve. The valve will close. (Continue to apply 12 volts until the end of test.)
3. Pressurize the EVAP line using pressure pump with 1.3 to 2.7 kPa (10 to 20 mag, 0.39 to 0.79 mmHg), then remove pump and EVAP
service port adapter.
CAUTION:
- Never use compressed air or a high pressure pump.
- Do not exceed 4.12 kPa (0.042 kg/cm2, 0.6 psi) of pressure in the system.
4. Using EVAP leak detector, locate the EVAP leak. For the leak detector, refer to the instruction manual for more details. See: Powertrain
Management/Emission Control Systems/Evaporative Emissions System/Description and Operation/Evaporative Emission System.
OK or NG
OK - GO TO 8.
NG - Repair or replace.
8.CHECK EVAP CANISTER VENT CONTROL VALVE
Check the following.
- EVAP canister vent control valve is installed properly. See: Powertrain Management/Emission Control Systems/Evaporative Emissions
System/Evaporative Emission Control Canister/Service and Repair.
- EVAP canister vent control valve. See: P0447.
OK or NG
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 262
OK - GO TO 9.
NG - Repair or replace EVAP canister vent control valve and O-ring.
9.CHECK IF EVAP CANISTER SATURATED WITH WATER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
2. Does water drain from the EVAP canister?
Yes or No
Yes - GO TO 10.
No (With CONSULT-III)-GO TO 12.
No (Without CONSULT-III)-GO TO 13.
10.CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.
The weight should be less than 3.2 kg (7.1 lb).
OK or NG
OK (With CONSULT-III)-GO TO 12.
OK (Without CONSULT-III)-GO TO 13.
NG - GO TO 11.
11.DETECT MALFUNCTIONING PART
Check the following.
- EVAP canister for damage
- EVAP hose between EVAP canister and vehicle frame for clogging or poor connection
- Repair hose or replace EVAP canister.
12.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT-III
1. Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
2. Start engine.
3. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode.
4. Touch "Qu" on CONSULT-III screen to increase "PURG VOL CONT/V" opening to 100%.
5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
Vacuum should exist.
OK or NG
OK - GO TO 15.
NG - GO TO 14.
13.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
Without CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
4. Start engine and let it idle for at least 80 seconds.
5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
Vacuum should exist.
OK or NG
OK - GO TO 16.
NG - GO TO 14.
14.CHECK VACUUM HOSE
Check vacuum hoses for clogging or disconnection. See: Powertrain Management/Emission Control Systems/Evaporative Emissions
System/Description and Operation/Evaporative Emission System.
OK or NG
OK - GO TO 15.
NG - Repair or reconnect the hose.
15.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
See: P0444.
OK or NG
OK - GO TO 16.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 263
NG - Replace EVAP canister purge volume control solenoid valve.
16.CHECK FUEL TANK TEMPERATURE SENSOR
See: P0181.
OK or NG
OK - GO TO 17.
NG - Replace fuel level sensor unit.
17.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
See: P0451.
OK or NG
OK - GO TO 18.
NG - Replace EVAP control system pressure sensor.
18.CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection. See: Powertrain
Management/Emission Control Systems/Evaporative Emissions System/Description and Operation/Evaporative Emission System.
OK or NG
OK - GO TO 19.
NG - Repair or reconnect the hose.
19.CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
- GO TO 20.
20.CHECK EVAP/ORVR LINE
Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kink, looseness and improper connection. For location, See:
Powertrain Management/Emission Control Systems/Evaporative Emissions System/Description and Operation/On Board Refueling Vapor
Recovery (ORVR) See: Powertrain Management/Emission Control Systems/Evaporative Emissions System/Testing and Inspection/On Board
Refueling Vapor Recovery (ORVR).
OK or NG
OK - GO TO 21.
NG - Repair or replace hoses and tubes.
21.CHECK RECIRCULATION LINE
Check recirculation line between filler neck tube and fuel tank for clogging, kink, cracks, looseness and improper connection.
OK or NG
OK - GO TO 22.
NG - Repair or replace hose, tube or filler neck tube.
22.CHECK REFUELING EVAP VAPOR CUT VALVE
See: Powertrain Management/Emission Control Systems/Evaporative Emissions System/Refueling Vapor Recovery System/Testing and
Inspection.
OK or NG
OK - GO TO 23.
NG - Replace refueling EVAP vapor cut valve with fuel tank.
23.CHECK FUEL LEVEL SENSOR
See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Component Tests and General Diagnostics/Fuel Level Sensor
Signal Circuit/Component Inspection.
OK or NG
OK - GO TO 24.
NG - Replace fuel level sensor unit.
24.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FILLER CAP)
1. Wipe clean valve housing.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 264
2. Check valve opening pressure and vacuum.
3. If out of specification, replace fuel filler cap as an assembly.
CAUTION:
Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may come on.
P0443
P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Description
SYSTEM DESCRIPTION
This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass passage in the EVAP canister purge
volume control solenoid valve changes to control the flow rate. The EVAP canister purge volume control solenoid valve repeats ON/OFF
operation according to the signal sent from the ECM. The opening of the valve varies for optimum engine control. The optimum value stored in
the ECM is determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor from the EVAP
canister is regulated as the air flow changes.
COMPONENT DESCRIPTION
The EVAP canister purge volume control solenoid valve uses a ON/OFF duty to control the flow rate of fuel vapor from the EVAP canister. The
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 265
EVAP canister purge volume control solenoid valve is moved by ON/OFF pulses from the ECM. The longer the ON pulse, the greater the amount
of fuel vapor that will flow through the valve.
On Board Diagnosis Logic
DTC Confirmation Procedure
Perform PROCEDURE FOR MALFUNCTION A first.
If the DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
PROCEDURE FOR MALFUNCTION A
TESTING CONDITION:
- Perform "DTC CONFIRMATION PROCEDURE" when the fuel level is between 1/4 and 3/4 full, and vehicle is placed on flat level
surface.
- Always perform test at a temperature of 5 to 60癈 (41癋).
- Cool the vehicle so that engine coolant temperature becomes same level as ambient temperature.
With CONSULT-III
1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-III.
2. Check that the following condition are met.
FUEL T/TMP SE: 0 - 35癈 (32 - 95癋)
3. Start engine and wait at least 60 seconds.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to See: P0443.
With GST
1. Turn ignition switch ON.
2. Set voltmeter probes to ECM terminal 107 (FTT sensor signal) and ground.
3. Check that the voltage is 3.1 - 4.2 V.
4. Start engine and wait at least 60 seconds.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to See: P0443.
PROCEDURE FOR MALFUNCTION B
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 266
Always perform test at a temperature of 5癈 (41癋) or more.
With CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON.
6. Select "PURG VOL CN/V P1444" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with
CONSULT-III.
7. Touch "START".
8. Start engine and let it idle until "TESTING" on CONSULT-III changes to "COMPLETED". (It will take approximately 10 seconds.)
If "TESTING" is not displayed after 5 minutes, retry from step 2.
9. Make sure that "OK" is displayed after touching "SELF-DIAG RESULTS". If "NG" is displayed, See: P0443.
With GST
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Start engine and let it idle for at least 20 seconds.
6. Select Service $07 with GST.
7. If 1st trip DTC is detected, go to See: P0443.
Diagnosis Procedure
1.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
3. Turn ignition switch ON.
4. Check voltage between EVAP canister purge volume control solenoid valve terminal 1 and ground with CONSULT-III or tester.
Voltage: Battery voltage
OK or NG
OK - GO TO 3.
NG - GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- Harness for open or short between EVAP canister purge volume control solenoid valve and IPDM E/R
- Harness for open or short between EVAP canister purge volume control solenoid valve and ECM
- Repair harness or connectors.
3.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT
FOR OPEN AND SHORT
1. Turn ignition switch OFF.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 267
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 45 and EVAP canister purge volume control solenoid valve terminal 2. Refer to Wiring
Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 4.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
2. Check connectors for water.
Water should not exist.
OK or NG
OK - GO TO 5.
NG - Replace EVAP control system pressure sensor.
5.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
See: P0451.
OK or NG
OK (With CONSULT-III)-GO TO 6.
OK (Without CONSULT-III)-GO TO 7.
NG - Replace EVAP control system pressure sensor.
6.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-III
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Start engine.
4. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-III. Check that engine speed varies according to the valve
opening.
OK or NG
OK - GO TO 8.
NG - GO TO 7.
7.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
See: P0443.
OK or NG
OK - GO TO 8.
NG - Replace EVAP canister purge volume control solenoid valve.
8.CHECK RUBBER TUBE FOR CLOGGING
1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging.
OK or NG
OK - GO TO 9.
NG - Clean the rubber tube using an air blower.
9.CHECK EVAP CANISTER VENT CONTROL VALVE
See: P0448.
OK or NG
OK - GO TO 10.
NG - Replace EVAP canister vent control valve.
10.CHECK IF EVAP CANISTER SATURATED WITH WATER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
2. Check if water will drain from the EVAP canister.
Yes or No
Yes - GO TO 11.
No - GO TO 13.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 268
11.CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.
The weight should be less than 3.2 kg (7.1 lb).
OK or NG
OK - GO TO 13.
NG - GO TO 12.
12.DETECT MALFUNCTIONING PART
Check the following.
- EVAP canister for damage
- EVAP hose between EVAP canister and vehicle frame for clogging or poor connection
- Repair hose or replace EVAP canister.
13.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-III
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.
Without CONSULT-III
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.
P0444
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Description
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 269
SYSTEM DESCRIPTION
This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass passage in the EVAP canister purge
volume control solenoid valve changes to control the flow rate. The EVAP canister purge volume control solenoid valve repeats ON/OFF
operation according to the signal sent from the ECM. The opening of the valve varies for optimum engine control. The optimum value stored in
the ECM is determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor from the EVAP
canister is regulated as the air flow changes.
COMPONENT DESCRIPTION
The EVAP canister purge volume control solenoid valve uses a ON/OFF duty to control the flow rate of fuel vapor from the EVAP canister. The
EVAP canister purge volume control solenoid valve is moved by ON/OFF pulses from the ECM. The longer the ON pulse, the greater the amount
of fuel vapor that will flow through the valve.
On Board Diagnosis Logic
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11 V at idle.
1. Start engine and let it idle for at least 13 seconds.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to See: P0444.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 270
Diagnosis Procedure
1.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
3. Turn ignition switch ON.
4. Check voltage between EVAP canister purge volume control solenoid valve terminal 1 and ground with CONSULT-III or tester.
Voltage: Battery voltage
OK or NG
OK - GO TO 3.
NG - GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- Harness for open or short between EVAP canister purge volume control solenoid valve and IPDM E/R
- Harness for open or short between EVAP canister purge volume control solenoid valve and ECM
- Repair harness or connectors.
3.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT
FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 45 and EVAP canister purge volume control solenoid valve terminal 2. Refer to Wiring
Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK (With CONSULT-III)-GO TO 4.
OK (Without CONSULT-III)-GO TO 5.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT-III
1. Reconnect all harness connectors disconnected.
2. Start engine.
3. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-III. Check that engine speed varies according to the valve
opening.
OK or NG
OK - GO TO 6.
NG - GO TO 5.
5.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
See: P0444.
OK or NG
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 271
OK - GO TO 6.
NG - Replace EVAP canister purge volume control solenoid valve.
6.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-III
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.
Without CONSULT-III
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.
P0445
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Description
SYSTEM DESCRIPTION
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 272
This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass passage in the EVAP canister purge
volume control solenoid valve changes to control the flow rate. The EVAP canister purge volume control solenoid valve repeats ON/OFF
operation according to the signal sent from the ECM. The opening of the valve varies for optimum engine control. The optimum value stored in
the ECM is determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor from the EVAP
canister is regulated as the air flow changes.
COMPONENT DESCRIPTION
The EVAP canister purge volume control solenoid valve uses a ON/OFF duty to control the flow rate of fuel vapor from the EVAP canister. The
EVAP canister purge volume control solenoid valve is moved by ON/OFF pulses from the ECM. The longer the ON pulse, the greater the amount
of fuel vapor that will flow through the valve.
On Board Diagnosis Logic
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11 V at idle.
1. Start engine and let it idle for at least 13 seconds.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to See: P0444.
Diagnosis Procedure
1.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 273
1. Turn ignition switch OFF.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
3. Turn ignition switch ON.
4. Check voltage between EVAP canister purge volume control solenoid valve terminal 1 and ground with CONSULT-III or tester.
Voltage: Battery voltage
OK or NG
OK - GO TO 3.
NG - GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- Harness for open or short between EVAP canister purge volume control solenoid valve and IPDM E/R
- Harness for open or short between EVAP canister purge volume control solenoid valve and ECM
- Repair harness or connectors.
3.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT
FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 45 and EVAP canister purge volume control solenoid valve terminal 2. Refer to Wiring
Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK (With CONSULT-III)-GO TO 4.
OK (Without CONSULT-III)-GO TO 5.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT-III
1. Reconnect all harness connectors disconnected.
2. Start engine.
3. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-III. Check that engine speed varies according to the valve
opening.
OK or NG
OK - GO TO 6.
NG - GO TO 5.
5.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
See: P0444.
OK or NG
OK - GO TO 6.
NG - Replace EVAP canister purge volume control solenoid valve.
6.CHECK INTERMITTENT INCIDENT
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 274
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-III
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.
Without CONSULT-III
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.
P0447
P0447 EVAP CANISTER VENT CONTROL VALVE
Component Description
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 275
The EVAP canister vent control valve is located on the EVAP canister and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative
emission control system components.
This solenoid valve is used only for diagnosis, and usually remains opened.
When the vent is closed, under normal purge conditions, the evaporative emission control system is depressurized and allows EVAP
Control System diagnosis.
On Board Diagnosis Logic
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11 V at idle.
1. Start engine and wait at least 8 seconds.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to See: P0447.
Diagnosis Procedure
1.INSPECTION START
Do you have CONSULT-III?
Yes or No
Yes - GO TO 2.
No - GO TO 3.
2.CHECK EVAP CANISTER VENT CONTROL VALVE CIRCUIT
With CONSULT-III
1. Turn ignition switch OFF and then turn ON.
2. Select "VENT CONTROL/V" in "ACTIVE TEST" mode with CONSULT-III.
3. Touch "ON/OFF" on CONSULT-III screen.
4. Check for operating sound of the valve.
Clicking noise should be heard.
OK or NG
OK - GO TO 7.
NG - GO TO 3.
3.CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect EVAP canister vent control valve harness connector.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 276
3. Turn ignition switch ON.
4. Check voltage between EVAP canister vent control valve terminal 2 and ground with CONSULT-III or tester.
Voltage: Battery voltage
OK or NG
OK - GO TO 5.
NG - GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E41, C1
- Harness for open or short between EVAP canister vent control valve and IPDM E/R
- Repair harness or connectors.
5.CHECK EVAP CANISTER VENT CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 117 and EVAP canister vent control valve terminal 1. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 7.
NG - GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E41, C1
- Harness for open or short between EVAP canister vent control valve and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK RUBBER TUBE FOR CLOGGING
1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging.
OK or NG
OK - GO TO 8.
NG - Clean the rubber tube using an air blower.
8.CHECK EVAP CANISTER VENT CONTROL VALVE
See: P0447.
OK or NG
OK - GO TO 9.
NG - Replace EVAP canister vent control valve.
9.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 277
EVAP CANISTER VENT CONTROL VALVE
With CONSULT-III
1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion B of EVAP canister vent control valve for being rusted.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
3. Reconnect harness connectors disconnected.
4. Turn ignition switch ON.
5. Perform "VENT CONTROL/V" in "ACTIVE TEST" mode.
6. Check air passage continuity and operation delay time.
Make sure new O-ring is installed properly.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
7. Clean the air passage (portion A to B) of EVAP canister vent control valve using an air blower.
8. Perform step 6 again.
Without CONSULT-III
1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion B of EVAP canister vent control valve for being rusted.
3. Check air passage continuity and operation delay time under the following conditions.
Make sure new O-ring is installed properly.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 278
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
4. Clean the air passage (portion A to B) of EVAP canister vent control valve using an air blower.
5. Perform step 3 again.
P0448
P0448 EVAP CANISTER VENT CONTROL VALVE
Component Description
The EVAP canister vent control valve is located on the EVAP canister and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative
emission control system components.
This solenoid valve is used only for diagnosis, and usually remains opened.
When the vent is closed, under normal purge conditions, the evaporative emission control system is depressurized and allows EVAP
Control System diagnosis.
On Board Diagnosis Logic
DTC Confirmation Procedure
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON and wait at least 5 seconds.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and let it idle for at least 1 minute.
5. Repeat next procedures 3 times.
a. Increase the engine speed up to 3,000 to 3,500 rpm and keep it for 2 minutes and 50 seconds to 3 minutes.
Never exceed 3 minutes.
b. Fully released accelerator pedal and keep engine idle for about 5 seconds.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 279
6. Check 1st trip DTC.
7. If 1st trip DTC is detected, go to See: P0448.
If 1st trip DTC is not detected, go to the next step.
8. Repeat next procedure 20 times.
a. Quickly increase the engine speed up to 4,000 to 4,500 rpm or more and keep it for 25 to 30 seconds.
b. Fully released accelerator pedal and keep engine idle for at least 35 seconds.
9. Check 1st trip DTC.
10. If 1st trip DTC is detected, go to See: P0448.
Diagnosis Procedure
1.CHECK RUBBER TUBE
1. Turn ignition switch OFF.
2. Disconnect rubber tube connected to EVAP canister vent control valve.
3. Check the rubber tube for clogging.
OK or NG
OK - GO TO 2.
NG - Clean rubber tube using an air blower.
2.CHECK EVAP CANISTER VENT CONTROL VALVE
See: P0448.
OK or NG
OK - GO TO 3.
NG - Replace EVAP canister vent control valve.
3.CHECK IF EVAP CANISTER SATURATED WITH WATER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
2. Check if water will drain from the EVAP canister.
Yes or No
Yes - GO TO 4.
No - GO TO 6.
4.CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.
The weight should be less than 3.2 kg (7.1 lb).
OK or NG
OK - GO TO 6.
NG - GO TO 5.
5.DETECT MALFUNCTIONING PART
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 280
Check the following.
- EVAP canister for damage
- EVAP hose between EVAP canister and vehicle frame for clogging or poor connection
- Repair hose or replace EVAP canister.
6.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
2. Check connectors for water.
Water should not exist.
OK or NG
OK - GO TO 7.
NG - Replace EVAP control system pressure sensor.
7.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
See: P0451.
OK or NG
OK - GO TO 8.
NG - Replace EVAP control system pressure sensor.
8.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
EVAP CANISTER VENT CONTROL VALVE
With CONSULT-III
1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion B of EVAP canister vent control valve for being rusted.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
3. Reconnect harness connectors disconnected.
4. Turn ignition switch ON.
5. Perform "VENT CONTROL/V" in "ACTIVE TEST" mode.
6. Check air passage continuity and operation delay time.
Make sure that new O-ring is installed properly.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
7. Clean the air passage (Portion A to B) of EVAP canister vent control valve using an air blower.
8. Perform step 6 again.
Without CONSULT-III
1. Remove EVAP canister vent control valve from EVAP canister.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 281
2. Check portion B of EVAP canister vent control valve for being rusted.
3. Check air passage continuity and operation delay time under the following conditions.
Make sure that new O-ring is installed properly.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
4. Clean the air passage (Portion A to B) of EVAP canister vent control valve using an air blower.
5. Perform step 3 again.
P0451
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component Description
The EVAP control system pressure sensor detects pressure in the purge line. The sensor output voltage to the
ECM increases as pressure increases.
On Board Diagnosis Logic
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 282
NOTE:
If DTC P0451 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. See: P0643.
DTC Confirmation Procedure
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and wait at least 40 seconds.
NOTE:
Do not depress accelerator pedal even slightly.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to See: P0451.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Power Supply
And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER
1. Disconnect EVAP control system pressure sensor harness connector.
2. Check sensor harness connector for water.
Water should not exist.
OK or NG
OK - GO TO 3.
NG - Repair or replace harness connector.
3.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
See: P0451.
OK or NG
OK - GO TO 4.
NG - Replace EVAP control system pressure sensor.
4.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 283
For wiring diagram, See: Powertrain Management/Computers and Control Systems/Diagrams/Electrical Diagrams.
- INSPECTION END
Component Inspection
EVAP CONTROL SYSTEM PRESSURE SENSOR
1. Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister.
Always replace O-ring with a new one.
2. Install a vacuum pump to EVAP control system pressure sensor.
3. Turn ignition switch ON and check output voltage between ECM terminal 32 and ground under the following conditions.
CAUTION:
- Always calibrate the vacuum pump gauge when using it.
- Do not apply below -93.3 kPa (-700 mmHg, -27.56 inHg) or pressure over 101.3 kPa (760 mmHg, 29.92 inHg).
4. If NG, replace EVAP control system pressure sensor.
P0452
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component Description
The EVAP control system pressure sensor detects pressure in the purge line. The sensor output voltage to the
ECM increases as pressure increases.
On Board Diagnosis Logic
NOTE:
If DTC P0452 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. See: P0643 See: P0643 See: P0643.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 284
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Always perform test at a temperature of 5癈 (41癋) or more.
WITH CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Select "DATA MONITOR" mode with CONSULT-III.
5. Make sure that "FUEL T/TMP SE" is more than 0癈 (32癋).
6. Start engine and wait at least 20 seconds.
7. Check 1st trip DTC.
8. If 1st trip DTC is detected, go to See: P0452.
WITH GST
1. Start engine and warm it up to normal operating temperature.
2. Check that voltage between ECM terminal 107 (Fuel tank temperature sensor signal) and ground is less than 4.2 V.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and wait at least 20 seconds.
5. Select Service $07 with GST.
If 1st trip DTC is detected, go to See: P0452.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 285
2. Check sensor harness connector for water.
Water should not exist.
OK or NG
OK - GO TO 3.
NG - Repair or replace harness connector.
3.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between EVAP control system pressure sensor terminal 3 and ground with CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 5.
NG - GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors C1, E41
- Harness connectors E5, F14
- Harness for open or short between EVAP control system pressure sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between EVAP control system pressure sensor terminal 1 and ECM terminal 67.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 7.
NG - GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors C1, E41
- Harness connectors E5, F14
- Harness for open or short between EVAP control system pressure sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 32 and EVAP control system pressure sensor terminal 2.
Refer to Wiring Diagram.
Continuity should exist.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 286
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 9.
NG - GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors C1, E41
- Harness connectors E5, F14
- Harness for open or short between EVAP control system pressure sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
See: P0452.
OK or NG
OK - GO TO 10.
NG - Replace EVAP control system pressure sensor.
10.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
EVAP CONTROL SYSTEM PRESSURE SENSOR
1. Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister.
Always replace O-ring with a new one.
2. Install a vacuum pump to EVAP control system pressure sensor.
3. Turn ignition switch ON and check output voltage between ECM terminal 32 and ground under the following conditions.
CAUTION:
- Always calibrate the vacuum pump gauge when using it.
- Do not apply below -93.3 kPa (-700 mmHg, -27.56 inHg) or pressure over 101.3 kPa (760 mmHg, 29.92 inHg).
4. If NG, replace EVAP control system pressure sensor.
P0453
P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component Description
The EVAP control system pressure sensor detects pressure in the purge line. The sensor output voltage to the
ECM increases as pressure increases.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 287
On Board Diagnosis Logic
NOTE:
If DTC P0451 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. See: P0643.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Always perform test at a temperature of 5癈 (41癋) or more.
With CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Select "DATA MONITOR" mode with CONSULT-III.
5. Make sure that "FUEL T/TMP SE" is more than 0癈 (32癋).
6. Start engine and wait at least 20 seconds.
7. Check 1st trip DTC.
8. If 1st trip DTC is detected, go to See: P0453.
With GST
1. Start engine and warm it up to normal operating temperature.
2. Check that voltage between ECM terminal 107 (Fuel tank temperature sensor signal) and ground is less than 4.2 V.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and wait at least 20 seconds.
5. Select Service $07 with GST.
If 1st trip DTC is detected, go to See: P0453.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
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2. Loosen and retighten three ground screws on the body. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
2. Check sensor harness connector for water.
Water should not exist.
OK or NG
OK - GO TO 3.
NG - Repair or replace harness connector.
3.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between EVAP control system pressure sensor terminal 3 and ground with CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 5.
NG - GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors C1, E41
- Harness connectors E5, F14
- Harness for open or short between EVAP control system pressure sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between EVAP control system pressure sensor terminal 1 and ECM terminal 67.
Refer to Wiring Diagram.
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Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 7.
NG - GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors C1, E41
- Harness connectors E5, F14
- Harness for open or short between EVAP control system pressure sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
2. 1. Check harness continuity between ECM terminal 32 and EVAP control system pressure sensor terminal 2.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 9.
NG - GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors C1, E41
- Harness connectors E5, F14
- Harness for open or short between EVAP control system pressure sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK RUBBER TUBE
1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging, vent or kinked.
OK or NG
OK - GO TO 10.
NG - Clean the rubber tube using an air blower, repair or replace rubber tube.
10.CHECK EVAP CANISTER VENT CONTROL VALVE
See: P0447.
OK or NG
OK - GO TO 11.
NG - Replace EVAP canister vent control valve.
11.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
See: P0453.
OK or NG
OK - GO TO 12.
NG - Replace EVAP control system pressure sensor.
12.CHECK IF EVAP CANISTER SATURATED WITH WATER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
2. Check if water will drain from the EVAP canister.
Yes or No
Yes - GO TO 13.
No - GO TO 15.
13.CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.
The weight should be less than 3.2 kg (7.1 lb).
OK or NG
OK - GO TO 15.
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NG - GO TO 14.
14.DETECT MALFUNCTIONING PART
Check the following.
- EVAP canister for damage
- EVAP hose between EVAP canister and vehicle frame for clogging or poor connection
- Repair hose or replace EVAP canister.
15.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
EVAP CONTROL PRESSURE SENSOR
1. Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister.
Always replace O-ring with a new one.
2. Install a vacuum pump to EVAP control system pressure sensor.
3. Turn ignition switch ON and check output voltage between ECM terminal 32 and ground under the following conditions.
CAUTION:
- Always calibrate the vacuum pump gauge when using it.
- Do not apply below -93.3 kPa (-700 mmHg, -27.56 inHg) or pressure over 101.3 kPa (760 mmHg, 29.92 inHg).
4. If NG, replace EVAP control system pressure sensor.
P0455
P0455 EVAP CONTROL SYSTEM
On Board Diagnosis Logic
This diagnosis detects a very large leak (fuel filler cap fell off etc.) in EVAP system between the fuel tank and
EVAP canister purge volume control solenoid valve.
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CAUTION:
- Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the
MIL may come on.
- If the fuel filler cap is not tightened properly, the MIL may come on.
- Use only a genuine NISSAN rubber tube as a replacement.
DTC Confirmation Procedure
CAUTION:
Never remove fuel filler cap during the DTC Confirmation Procedure.
NOTE:
- Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid valve properly.
- If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
- Perform "DTC WORK SUPPORT" when the fuel level is between 1/4 and 3/4 full, and vehicle is placed on flat level surface.
- Open engine hood before conducting the following procedures.
WITH CONSULT-III
1. Tighten fuel filler cap securely until ratcheting sound is heard.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-III.
5. Make sure that the following conditions are met.
COOLAN TEMP/S: 0 - 70癈 (32 - 158癋)
INT/A TEMP SE: 0 - 60癈 (32 - 140癋)
6. Select "EVP SML LEAK P0442/P1442" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT-III.
Follow the instruction displayed.
NOTE:
If the engine speed cannot be maintained within the range displayed on the CONSULT-III screen, go to See: Powertrain Management/Computers
and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Basic Inspection.
7. Make sure that "OK" is displayed.
If "NG" is displayed, select "SELF-DIAG RESULTS" mode and make sure that "EVAP GROSS LEAK
[P0455]" is displayed. If it is displayed, See: P0455.
If P0442 is displayed, perform Diagnostic Procedure for DTC P0442, See: P0442.
WITH GST
NOTE:
Be sure to read the explanation of See: before driving vehicle.
1. Start engine.
2. Drive vehicle according to See: .
3. Stop vehicle.
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4. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
5. Select Service $07 with GST.
- If P0441 is displayed on the screen, go to See: P0441.
- If P0442 is displayed on the screen, go to See: P0442.
- If P0455 is displayed on the screen, go to See: P0455.
Diagnosis Procedure
1.CHECK FUEL FILLER CAP DESIGN
1. Turn ignition switch OFF.
2. Check for genuine NISSAN fuel filler cap design.
OK or NG
OK - GO TO 2.
NG - Replace with genuine NISSAN fuel filler cap.
2.CHECK FUEL FILLER CAP INSTALLATION
Check that the cap is tightened properly by rotating the cap clockwise.
OK or NG
OK - GO TO 3.
NG - 1. Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
2. Retighten until ratcheting sound is heard.
3.CHECK FUEL FILLER CAP FUNCTION
Check for air releasing sound while opening the fuel filler cap.
OK or NG
OK - GO TO 5.
NG - GO TO 4.
4.CHECK FUEL TANK VACUUM RELIEF VALVE
See: P0455.
OK or NG
OK - GO TO 5.
NG - Replace fuel filler cap with a genuine one.
5.CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks, improper connection or disconnection. See: Powertrain
Management/Emission Control Systems/Evaporative Emissions System/Description and Operation/Evaporative Emission System.
OK or NG
OK - GO TO 6.
NG - Repair or reconnect the hose.
6.CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
- GO TO 7.
7.CHECK EVAP CANISTER VENT CONTROL VALVE
Check the following.
- EVAP canister vent control valve is installed properly. See: Powertrain Management/Emission Control Systems/Evaporative Emissions
System/Evaporative Emission Control Canister/Service and Repair.
- EVAP canister vent control valve. See: P0447.
OK or NG
OK - GO TO 8.
NG - Repair or replace EVAP canister vent control valve and O-ring.
8.INSTALL THE PRESSURE PUMP
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To locate the EVAP leak, install EVAP service port adapter and pressure pump to EVAP service port securely.
NOTE:
Improper installation of the EVAP service port adapter to the
EVAP service port may cause leaking.
With CONSULT-III-GO TO 9.
Without CONSULT-III-GO TO 10.
9.CHECK FOR EVAP LEAK
With CONSULT-III
1. Turn ignition switch ON.
2. Select "EVAP SYSTEM CLOSE" of "WORK SUPPORT" mode with CONSULT-III.
3. Touch "START" and apply pressure into the EVAP line until the pressure indicator reaches the middle of the bar graph.
CAUTION:
- Do not use compressed air or a high pressure pump.
- Do not exceed 4.12 kPa (0.042 kg/cm2, 0.6 psi) of pressure in the system.
4. Using EVAP leak detector, locate the EVAP leak. For the leak detector, refer to the instruction manual for more details. See: Powertrain
Management/Emission Control Systems/Evaporative Emissions System/Description and Operation/Evaporative Emission System.
OK or NG
OK - GO TO 11.
NG - Repair or replace.
10.CHECK FOR EVAP LEAK
Without CONSULT-III
1. Turn ignition switch OFF.
2. Apply 12 volts DC to EVAP canister vent control valve. The valve will close. (Continue to apply 12 volts until the end of test.)
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3. Pressurize the EVAP line using pressure pump with 1.3 to 2.7 kPa (10 to 20 mmHg, 0.39 to 0.79 inHg), then remove pump and EVAP
service port adapter.
CAUTION:
- Do not use compressed air or a high pressure pump.
- Do not exceed 4.12 kPa (0.042 kg/cm2, 0.6 psi) of pressure in the system.
4. Using EVAP leak detector, locate the EVAP leak. For the leak detector, refer to the instruction manual for more details. See: Powertrain
Management/Emission Control Systems/Evaporative Emissions System/Description and Operation/Evaporative Emission System.
OK or NG
OK - GO TO 12.
NG - Repair or replace.
11.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT-III
1. Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
2. Start engine.
3. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode.
4. Touch "Qu" on CONSULT-III screen to increase "PURG VOL CONT/V" opening to 100%.
5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
Vacuum should exist.
OK or NG
OK - GO TO 14.
NG - GO TO 13.
12.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
Without CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
4. Start engine and let it idle for at least 80 seconds.
5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
Vacuum should exist.
OK or NG
OK - GO TO 15.
NG - GO TO 13.
13.CHECK VACUUM HOSE
Check vacuum hoses for clogging or disconnection. See: Powertrain Management/Emission Control Systems/Evaporative Emissions
System/Description and Operation/Evaporative Emission System.
OK or NG
OK (With CONSULT-III)-GO TO 14.
OK (Without CONSULT-III)-GO TO 15.
NG - Repair or reconnect the hose.
14.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-III
1. Start engine.
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2. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-III. Check that engine speed varies according to the valve
opening.
OK or NG
OK - GO TO 16.
NG - GO TO 15.
15.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
See: P0444.
OK or NG
OK - GO TO 16.
NG - Replace EVAP canister purge volume control solenoid valve.
16.CHECK FUEL TANK TEMPERATURE SENSOR
See: P0181.
OK or NG
OK - GO TO 17.
NG - Replace fuel level sensor unit.
17.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
See: P0451.
OK or NG
OK - GO TO 18.
NG - Replace EVAP control system pressure sensor.
18.CHECK EVAP/ORVR LINE
Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kink, looseness and improper connection. For location, See:
Powertrain Management/Emission Control Systems/Evaporative Emissions System/Description and Operation/On Board Refueling Vapor
Recovery (ORVR) See: Powertrain Management/Emission Control Systems/Evaporative Emissions System/Testing and Inspection/On Board
Refueling Vapor Recovery (ORVR).
OK or NG
OK - GO TO 19.
NG - Repair or replace hoses and tubes.
19.CHECK RECIRCULATION LINE
Check recirculation line between filler neck tube and fuel tank for clogging, kink, cracks, looseness and improper connection.
OK or NG
OK - GO TO 20.
NG - Repair or replace hose, tube or filler neck tube.
20.CHECK REFUELING EVAP VAPOR CUT VALVE
See: Powertrain Management/Emission Control Systems/Evaporative Emissions System/Description and Operation/On Board Refueling Vapor
Recovery (ORVR) See: Powertrain Management/Emission Control Systems/Evaporative Emissions System/Testing and Inspection/On Board
Refueling Vapor Recovery (ORVR).
OK or NG
OK - GO TO 21.
NG - Replace refueling EVAP vapor cut valve with fuel tank.
21.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FILLER CAP)
1. Wipe clean valve housing.
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2. Check valve opening pressure and vacuum.
3. If out of specification, replace fuel filler cap as an assembly.
CAUTION:
Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may come on.
P0456
P0456 EVAP CONTROL SYSTEM
On Board Diagnosis Logic
This diagnosis detects very small leaks in the EVAP line between fuel tank and EVAP canister purge volume control solenoid valve, using the
intake manifold vacuum in the same way as conventional EVAP small leak diagnosis.
If ECM judges a leak which corresponds to a very small leak, the very small leak P0456 will be detected.
If ECM judges a leak equivalent to a small leak, EVAP small leak P0442 will be detected.
If ECM judges there are no leaks, the diagnosis will be OK.
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CAUTION:
- Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the
MIL may come on.
- If the fuel filler cap is not tightened properly, the MIL may come on.
- Use only a genuine NISSAN rubber tube as a replacement.
DTC Confirmation Procedure
NOTE:
- If DTC P0456 is displayed with P0442, first perform trouble diagnosis for DTC P0456.
- After repair, make sure that the hoses and clips are installed properly.
- If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
- Open engine hood before conducting following procedure.
- If any of following conditions are met just before the DTC confirmation procedure, leave the vehicle for more than 1 hour.
- Fuel filler cap is removed.
- Fuel is refilled or drained.
- EVAP component parts is/are removed.
- Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
WITH CONSULT-III
1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-III.
2. Make sure the following conditions are met.
FUEL LEVEL SE: 0.25 - 1.4V
COOLAN TEMP/S: 0 - 32癈 (32 - 90癋)
FUEL T/TMP SE: 0 - 35癈 (32 - 95癋)
INT/A TEMP SE: More than 0癈 (32癋)
If NG, turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle) or refilling/draining fuel until the output voltage condition
of the "FUEL LEVEL SE" meets within the range above and leave the vehicle for more than 1 hour. Then start from step 1).
3. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
4. Select "EVP V/S LEAK P0456/P1456" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT-III.
Follow the instruction displayed.
5. Make sure that "OK" is displayed.
If "NG" is displayed, See: P0456.
NOTE:
- If the engine speed cannot be maintained within the range displayed on CONSULT-III screen, go to See: Powertrain
Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Basic Inspection.
- Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid valve properly.
Overall Function Check
WITH GST
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Use this procedure to check the overall function of the EVAP very small leak function. During this check, a 1st trip DTC might not be confirmed.
CAUTION:
- Do not use compressed air, doing so may damage the EVAP system.
- Do not start engine.
- Do not exceeded 4.12 kPa (0.042 kg/cm2, 0.6 psi).
1. Attach the EVAP service port adapter (commercial service tool) securely to the EVAP service port.
2. Set the pressure pump and a hose.
3. Also set a vacuum gauge via 3-way connector and a hose.
4. Turn ignition switch ON.
5. Connect GST and select Service $08.
6. Using Service $08, control the EVAP canister vent control valve
(close).
7. Apply pressure and make sure the following conditions are satisfied.
Pressure to be applied: 2.7 kPa (20 mmHg, 0.79 inHg)
Time to be waited after the pressure drawn in to the EVAP system and the pressure to be dropped: 60 seconds and the pressure should
not be dropped more than 0.4 kPa (3 mmHg, 0.12 inHg).
If NG, go to See: P0456.
If OK, go to next step.
8. Disconnect GST.
9. Start engine and warm it up to normal operating temperature.
10. Turn ignition switch OFF and wait at least 10 seconds.
11. Restart engine and let it idle for 90 seconds.
12. Keep engine speed at 2,000 rpm for 30 seconds.
13. Turn ignition switch OFF.
NOTE:
For more information, refer to GST Instruction Manual.
Diagnosis Procedure
1.CHECK FUEL FILLER CAP DESIGN
1. Turn ignition switch OFF.
2. Check for genuine NISSAN fuel filler cap design.
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OK or NG
OK - GO TO 2.
NG - Replace with genuine NISSAN fuel filler cap.
2.CHECK FUEL FILLER CAP INSTALLATION
Check that the cap is tightened properly by rotating the cap clockwise.
OK or NG
OK - GO TO 3.
NG - 1. Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
2. Retighten until ratcheting sound is heard.
3.CHECK FUEL FILLER CAP FUNCTION
Check for air releasing sound while opening the fuel filler cap.
OK or NG
OK - GO TO 5.
NG - GO TO 4.
4.CHECK FUEL TANK VACUUM RELIEF VALVE
See: P0456.
OK or NG
OK - GO TO 5.
NG - Replace fuel filler cap with a genuine one.
5.INSTALL THE PRESSURE PUMP
To locate the EVAP leak, install EVAP service port adapter and pressure pump to EVAP service port securely.
NOTE:
Improper installation of the EVAP service port adapter to the
EVAP service port may cause leaking.
With CONSULT-III-GO TO 6.
Without CONSULT-III-GO TO 7.
6.CHECK FOR EVAP LEAK
With CONSULT-III
1. Turn ignition switch ON.
2. Select "EVAP SYSTEM CLOSE" of "WORK SUPPORT" mode with CONSULT-III.
3. Touch "START" and apply pressure into the EVAP line until the pressure indicator reaches the middle of the bar graph.
CAUTION:
- Do not use compressed air or a high pressure pump.
- Do not exceed 4.12 kPa (0.042 kg/cm2, 0.6 psi) of pressure in the system.
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4. Using EVAP leak detector, locate the EVAP leak. For the leak detector, refer to the instruction manual for more details. See: Powertrain
Management/Emission Control Systems/Evaporative Emissions System/Description and Operation/Evaporative Emission System.
OK or NG
OK - GO TO 8.
NG - Repair or replace.
7.CHECK FOR EVAP LEAK
Without CONSULT-III
1. Turn ignition switch OFF.
2. Apply 12 volts DC to EVAP canister vent control valve. The valve will close. (Continue to apply 12 volts until the end of test.)
3. Pressurize the EVAP line using pressure pump with 1.3 to 2.7 kPa (10 to 20 mmHg, 0.39 to 0.79 inHg), then remove pump and EVAP
service port adapter.
CAUTION:
- Do not use compressed air or a high pressure pump.
- Do not exceed 4.12 kPa (0.042 kg/cm2, 0.6 psi) of pressure in the system.
4. Using EVAP leak detector, locate the EVAP leak. For the leak detector, refer to the instruction manual for more details. See: Powertrain
Management/Emission Control Systems/Evaporative Emissions System/Description and Operation/Evaporative Emission System.
OK or NG
OK - GO TO 8.
NG - Repair or replace.
8.CHECK EVAP CANISTER VENT CONTROL VALVE
Check the following.
- EVAP canister vent control valve is installed properly. See: Powertrain Management/Emission Control Systems/Evaporative Emissions
System/Testing and Inspection/EVAP Canister.
- EVAP canister vent control valve. See: P0447.
OK or NG
OK - GO TO 9.
NG - Repair or replace EVAP canister vent control valve and O-ring.
9.CHECK IF EVAP CANISTER SATURATED WITH WATER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
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2. Does water drain from the EVAP canister?
Yes or No
Yes - GO TO 10.
No (With CONSULT-III)-GO TO 12.
No (Without CONSULT-III)-GO TO 13.
10.CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.
The weight should be less than 3.2 kg (7.1 lb).
OK or NG
OK (With CONSULT-III)-GO TO 12.
OK (Without CONSULT-III)-GO TO 13.
NG - GO TO 11.
11.DETECT MALFUNCTIONING PART
Check the following.
- EVAP canister for damage
- EVAP hose between EVAP canister and vehicle frame for clogging or poor connection
- Repair hose or replace EVAP canister.
12.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT-III
1. Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
2. Start engine.
3. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode.
4. Touch "Qu" on CONSULT-III screen to increase "PURG VOL CONT/V" opening to 100%.
5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
Vacuum should exist.
OK or NG
OK - GO TO 15.
NG - GO TO 14.
13.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
Without CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
4. Start engine and let it idle for at least 80 seconds.
5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
Vacuum should exist.
OK or NG
OK - GO TO 16.
NG - GO TO 14.
14.CHECK VACUUM HOSE
Check vacuum hoses for clogging or disconnection. See: Powertrain Management/Emission Control Systems/Evaporative Emissions
System/Description and Operation/Evaporative Emission System.
OK or NG
OK - GO TO 15.
NG - Repair or reconnect the hose.
15.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
See: P0444.
OK or NG
OK - GO TO 16.
NG - Replace EVAP canister purge volume control solenoid valve.
16.CHECK FUEL TANK TEMPERATURE SENSOR
See: P0181.
OK or NG
OK - GO TO 17.
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NG - Replace fuel level sensor unit.
17.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
See: P0451.
OK or NG
OK - GO TO 18.
NG - Replace EVAP control system pressure sensor.
18.CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection. See: Powertrain
Management/Emission Control Systems/Evaporative Emissions System/Description and Operation/Evaporative Emission System.
OK or NG
OK - GO TO 19.
NG - Repair or reconnect the hose.
19.CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
- GO TO 20.
20.CHECK EVAP/ORVR LINE
Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kink, looseness and improper connection. For location, See:
Powertrain Management/Emission Control Systems/Evaporative Emissions System/Description and Operation/On Board Refueling Vapor
Recovery (ORVR) See: Powertrain Management/Emission Control Systems/Evaporative Emissions System/Testing and Inspection/On Board
Refueling Vapor Recovery (ORVR).
OK or NG
OK - GO TO 21.
NG - Repair or replace hoses and tubes.
21.CHECK RECIRCULATION LINE
Check recirculation line between filler neck tube and fuel tank for clogging, kink, cracks, looseness and improper connection.
OK or NG
OK - GO TO 22.
NG - Repair or replace hose, tube or filler neck tube.
22.CHECK REFUELING EVAP VAPOR CUT VALVE
See: Powertrain Management/Emission Control Systems/Evaporative Emissions System/Refueling Vapor Recovery System/Testing and
Inspection.
OK or NG
OK - GO TO 23.
NG - Replace refueling EVAP vapor cut valve with fuel tank.
23.CHECK FUEL LEVEL SENSOR
See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Component Tests and General Diagnostics/Fuel Level Sensor
Signal Circuit/Component Inspection.
OK or NG
OK - GO TO 24.
NG - Replace fuel level sensor unit.
24.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FILLER CAP)
1. Wipe clean valve housing.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 303
2. Check valve opening pressure and vacuum.
3. If out of specification, replace fuel filler cap as an assembly.
CAUTION:
Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may come on.
P0460
P0460 FUEL LEVEL SENSOR
Component Description
The fuel level sensor is mounted in the fuel level sensor unit. The sensor detects a fuel level in the fuel tank and transmits a signal to the
combination meter. The combination meter sends the fuel level sensor signal to the ECM through CAN communication line.
It consists of two parts, one is mechanical float and the other is variable resistor. Fuel level sensor output voltage changes depending on the
movement of the fuel mechanical float.
On Board Diagnosis Logic
NOTE:
- If DTC P0460 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
- If DTC P0460 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. See: P0607.
When the vehicle is parked, naturally the fuel level in the fuel tank is stable. It means that output signal of the fuel level sensor does not change. If
ECM senses sloshing signal from the sensor, fuel level sensor malfunction is detected.
DTC Confirmation Procedure
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and wait maximum of 2 consecutive minutes.
3. Check 1st trip DTC.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 304
4. If 1st trip DTC is detected, go to See: P0460.
Diagnosis Procedure
1.CHECK COMBINATION METER FUNCTION
Refer to See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Scan Tool Testing and Procedures/CONSULT-III
Function.
OK or NG
OK - GO TO 2.
NG - Go to See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Component Tests and General Diagnostics/Fuel Level
Sensor Signal Circuit/Diagnosis Procedure.
2.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0461
P0461 FUEL LEVEL SENSOR
Component Description
The fuel level sensor is mounted in the fuel level sensor unit. The sensor detects a fuel level in the fuel tank and transmits a signal to the
combination meter. The combination meter sends the fuel level sensor signal to the ECM through CAN communication line.
It consists of two parts, one is mechanical float and the other is variable resistor. Fuel level sensor output voltage changes depending on the
movement of the fuel mechanical float.
On Board Diagnosis Logic
NOTE:
- If DTC P0461 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
- If DTC P0461 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. See: P0607.
Driving long distances naturally affect fuel gauge level.
This diagnosis detects the fuel gauge malfunction of the gauge not moving even after a long distance has been driven.
Overall Function Check
Use this procedure to check the overall function of the fuel level sensor function. During this check, a 1st trip
DTC might not be confirmed.
WARNING:
When performing following procedure, be sure to observe the handling of the fuel. See: Powertrain Management/Fuel Delivery and Air
Induction/Fuel Tank/Service and Repair.
TESTING CONDITION:
Before starting overall function check, preparation of draining fuel and refilling fuel is required.
WITH CONSULT-III
NOTE:
Start from step 10, if it is possible to confirm that the fuel cannot be drained by 30 l (7-7/8 US gal, 6-5/8 Imp gal) in advance.
1. Prepare a fuel container and a spare hose.
2. Release fuel pressure from fuel line, See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 305
Pressure/Testing and Inspection.
3. Remove the fuel feed hose on the fuel level sensor unit.
4. Connect a spare fuel hose where the fuel feed hose was removed.
5. Turn ignition switch OFF and wait at least 10 seconds then turn ON.
6. Select "FUEL LEVEL SE" in "DATA MONITOR" mode with CONSULT-III.
7. Check "FUEL LEVEL SE" output voltage and note it.
8. Select "FUEL PUMP" in "ACTIVE TEST" mode with CONSULT-III.
9. Touch "ON" and drain fuel approximately 30 l (7-7/8 US gal, 6-5/8 Imp gal) and stop it.
10. Check "FUEL LEVEL SE" output voltage and note it.
11. Fill fuel into the fuel tank for 30 l (7-7/8 US gal, 6-5/8 Imp gal).
12. Check "FUEL LEVEL SE" output voltage and note it.
13. Confirm whether the voltage changes more than 0.03V during step 7 to 10 and 10 to 12.
If NG, go to See: P0461.
WITH GST
NOTE:
Start from step 8, if it is possible to confirm that the fuel cannot be drained by 30 l (7-7/8 US gal, 6-5/8 Imp gal) in advance.
1. Prepare a fuel container and a spare hose.
2. Release fuel pressure from fuel line. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel
Pressure/Testing and Inspection.
3. Remove the fuel feed hose on the fuel level sensor unit.
4. Connect a spare fuel hose where the fuel feed hose was removed.
5. Turn ignition switch ON.
6. Drain fuel by 30 l (7-7/8 US gal, 6-5/8 Imp gal) from the fuel tank using proper equipment.
7. Confirm that the fuel gauge indication varies.
8. Fill fuel into the fuel tank for 30 l (7-7/8 US gal, 6-5/8 Imp gal).
9. Confirm that the fuel gauge indication varies.
10. If NG, go to See: P0461.
Diagnosis Procedure
1.CHECK COMBINATION METER FUNCTION
Refer to See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Scan Tool Testing and Procedures/CONSULT-III
Function.
OK or NG
OK - GO TO 2.
NG - Go to See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Component Tests and General Diagnostics/Fuel Level
Sensor Signal Circuit/Diagnosis Procedure.
2.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0462
P0462, P0463 FUEL LEVEL SENSOR
Component Description
The fuel level sensor is mounted in the fuel level sensor unit. The sensor detects a fuel level in the fuel tank and transmits a signal to the
combination meter. The combination meter sends the fuel level sensor signal to the ECM through CAN communication line.
It consists of two parts, one is mechanical float and the other is variable resistor. Fuel level sensor output voltage changes depending on the
movement of the fuel mechanical float.
On Board Diagnosis Logic
NOTE:
- If DTC P0462 or P0463 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC
UXXXX.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 306
- If DTC P0462 or P0463 is displayed with DTC P0607, first perform the trouble diagnosis for DTC
P0607. See: P0607.
This diagnosis indicates the former, to detect open or short circuit malfunction.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at ignition switch ON.
1. Turn ignition switch ON.
2. Wait at least 5 seconds.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to See: P0462.
Diagnosis Procedure
1.CHECK COMBINATION METER FUNCTION
Refer to See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Scan Tool Testing and Procedures/CONSULT-III
Function.
OK or NG
OK - GO TO 2.
NG - Go to See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Component Tests and General Diagnostics/Fuel Level
Sensor Signal Circuit/Diagnosis Procedure.
2.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0463
P0462, P0463 FUEL LEVEL SENSOR
Component Description
The fuel level sensor is mounted in the fuel level sensor unit. The sensor detects a fuel level in the fuel tank and transmits a signal to the
combination meter. The combination meter sends the fuel level sensor signal to the ECM through CAN communication line.
It consists of two parts, one is mechanical float and the other is variable resistor. Fuel level sensor output voltage changes depending on the
movement of the fuel mechanical float.
On Board Diagnosis Logic
NOTE:
- If DTC P0462 or P0463 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC
UXXXX.
- If DTC P0462 or P0463 is displayed with DTC P0607, first perform the trouble diagnosis for DTC
P0607. See: P0607.
This diagnosis indicates the former, to detect open or short circuit malfunction.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 307
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at ignition switch ON.
1. Turn ignition switch ON.
2. Wait at least 5 seconds.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to See: P0462.
Diagnosis Procedure
1.CHECK COMBINATION METER FUNCTION
Refer to See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Scan Tool Testing and Procedures/CONSULT-III
Function.
OK or NG
OK - GO TO 2.
NG - Go to See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Component Tests and General Diagnostics/Fuel Level
Sensor Signal Circuit/Diagnosis Procedure.
2.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0462, P0463 FUEL LEVEL SENSOR
Component Description
The fuel level sensor is mounted in the fuel level sensor unit. The sensor detects a fuel level in the fuel tank and transmits a signal to the
combination meter. The combination meter sends the fuel level sensor signal to the ECM through CAN communication line.
It consists of two parts, one is mechanical float and the other is variable resistor. Fuel level sensor output voltage changes depending on the
movement of the fuel mechanical float.
On Board Diagnosis Logic
NOTE:
- If DTC P0462 or P0463 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC
UXXXX.
- If DTC P0462 or P0463 is displayed with DTC P0607, first perform the trouble diagnosis for DTC
P0607. See: P0607 See: P0607 See: P0607 See: P0607.
This diagnosis indicates the former, to detect open or short circuit malfunction.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 308
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at ignition switch ON.
1. Turn ignition switch ON.
2. Wait at least 5 seconds.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to See: P0462.
Diagnosis Procedure
1.CHECK COMBINATION METER FUNCTION
Refer to See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Scan Tool Testing and Procedures/CONSULT-III
Function.
OK or NG
OK - GO TO 2.
NG - Go to See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Component Tests and General Diagnostics/Fuel Level
Sensor Signal Circuit/Diagnosis Procedure.
2.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0500
P0500 VSS
Description
NOTE:
- If DTC P0500 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
- If DTC P0500 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. See: P0607.
The vehicle speed signal is sent to the combination meter from the "ABS actuator and electric unit (control unit)" by CAN communication line.
The c combination meter then sends a signal to the ECM by CAN communication line.
On Board Diagnosis Logic
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode.
DTC Confirmation Procedure
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 309
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Steps 1 and 2 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test is expected to be easier, it
is unnecessary to lift the vehicle.
WITH CONSULT-III
1. Start engine (VDC switch OFF).
2. Read "VHCL SPEED SE" in "DATA MONITOR" mode with CONSULT-III. The vehicle speed on CONSULT-III should exceed 10 km/h (6
MPH) when rotating wheels with suitable gear position.
If NG, go to See: P0500.
If OK, go to following step.
3. Select "DATA MONITOR" mode with CONSULT-III.
4. Warm engine up to normal operating temperature.
5. Maintain the following conditions for at least 60 consecutive seconds.
6. Check 1st trip DTC.
7. If 1st trip DTC is detected, go to See: P0500.
Overall Function Check
Use this procedure to check the overall function of the vehicle speed signal circuit. During this check, a 1st trip
DTC might not be confirmed.
WITH GST
1. Lift up drive wheels.
2. Start engine.
3. Read vehicle speed signal in Service $01 with GST.
The vehicle speed signal on GST should be able to exceed 10 km/h (6 MPH) when rotating wheels with suitable gear position.
4. If NG, go to See: P0500.
Diagnosis Procedure
1.CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Scan Tool Testing and Procedures.
OK or NG
OK - GO TO 2.
NG - Repair or replace.
2.CHECK COMBINATION METER FUNCTION
Refer to See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Scan Tool Testing and Procedures/CONSULT-III
Function.
- INSPECTION END
P0506
P0506 ISC SYSTEM
Description
NOTE:
If DTC P0506 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.
The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let into the intake manifold, by
operating the electric throttle control actuator. The operating of the throttle valve is varied to allow for optimum control of the engine idling speed.
The crankshaft position sensor (POS) detects the actual engine speed and sends a signal to the ECM.
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value memorized in the ECM. The target
engine speed is the lowest speed at which the engine can operate steadily.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 310
The optimum value stored in the ECM is determined by taking into consideration various engine conditions, such as during warming up,
deceleration, and engine load (air conditioner, power steering and cooling fan operation, etc.).
On Board Diagnosis Logic
DTC Confirmation Procedure
NOTE:
- If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
- If the target idle speed is out of the specified value, perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine
Performance Checks/Idle Speed/Testing and Inspection, before conducting DTC Confirmation Procedure. For the target idle speed,
refer to the See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Specifications See:
Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Ignition Timing/Specifications See: Powertrain
Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures See: Powertrain
Management/Computers and Control Systems/Air Flow Meter/Sensor/Specifications See: Powertrain Management/Computers and
Control Systems/Air Temperature Sensor ( Ambient / Intake )/Specifications See: Engine, Cooling and Exhaust/Cooling
System/Engine - Coolant Temperature Sensor/Switch/Specifications See: Powertrain Management/Computers and Control
Systems/Oxygen Sensor/Specifications/A/F Sensor 1 Heater.
TESTING CONDITION:
- Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
- Always perform the test at a temperature above -10癈 (14癋).
1. Open engine hood.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and run it for at least 1 minute at idle speed.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to See: P0506.
Diagnosis Procedure
1.CHECK INTAKE AIR LEAK
1. Start engine and let it idle.
2. Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK - GO TO 2.
NG - Discover air leak location and repair.
2.REPLACE ECM
1. Stop engine.
2. Replace ECM.
3. Perform initialization of NVIS(NATS) system and registration of all NVIS(NATS) ignition key IDs. See: Accessories and Optional
Equipment/Antitheft and Alarm Systems/Testing and Inspection/Programming and Relearning/ECM Re-Communicating Function/Special
Repair Requirement/With Intelligent Key System (With intelligent key system) or See: Accessories and Optional Equipment/Antitheft and
Alarm Systems/Testing and Inspection/Programming and Relearning/ECM Re-Communicating Function/Special Repair Requirement/Without
Intelligent Key System (Without intelligent key system).
4. Perform See: Powertrain Management/Computers and Control Systems/Engine Control Module/Testing and Inspection.
5. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
6. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
7. [Flexible Fuel Vehicle]
Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle).
8. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
P0507
P0507 ISC SYSTEM
Description
NOTE:
If DTC P0507 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.
The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let into the intake manifold, by
operating the electric throttle control actuator. The operating of the throttle valve is varied to allow for optimum control of the engine idling speed.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 311
The crankshaft position sensor (POS) detects the actual engine speed and sends a signal to the ECM.
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value memorized in the ECM. The target
engine speed is the lowest speed at which the engine can operate steadily.
The optimum value stored in the ECM is determined by taking into consideration various engine conditions, such as during warming up,
deceleration, and engine load (air conditioner, power steering and cooling fan operation, etc.).
On Board Diagnosis Logic
DTC Confirmation Procedure
NOTE:
- If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
- If the target idle speed is out of the specified value, perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine
Performance Checks/Idle Speed/Testing and Inspection, before conducting DTC Confirmation Procedure. For the target idle speed,
refer to the See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Fuel Pressure/Specifications See:
Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Ignition Timing/Specifications See: Powertrain
Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures See: Powertrain
Management/Computers and Control Systems/Air Flow Meter/Sensor/Specifications See: Powertrain Management/Computers and
Control Systems/Air Temperature Sensor ( Ambient / Intake )/Specifications See: Engine, Cooling and Exhaust/Cooling
System/Engine - Coolant Temperature Sensor/Switch/Specifications See: Powertrain Management/Computers and Control
Systems/Oxygen Sensor/Specifications/A/F Sensor 1 Heater.
TESTING CONDITION:
- Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
- Always perform the test at a temperature above -10癈 (14癋).
1. Open engine hood.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and run it for at least 1 minute at idle speed.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to See: P0507.
Diagnosis Procedure
1.CHECK PCV HOSE CONNECTION
Confirm that PCV hose is connected correctly.
OK or NG
OK - GO TO 2.
NG - Repair or replace.
2.CHECK INTAKE AIR LEAK
1. Start engine and let it idle.
2. Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK - GO TO 3.
NG - Discover air leak location and repair.
3.REPLACE ECM
1. Stop engine.
2. Replace ECM.
3. Perform initialization of NVIS(NATS) system and registration of all NVIS(NATS) ignition key IDs. See: Accessories and Optional
Equipment/Antitheft and Alarm Systems/Testing and Inspection/Programming and Relearning/ECM Re-Communicating Function/Special
Repair Requirement/With Intelligent Key System (With intelligent key system) or See: Accessories and Optional Equipment/Antitheft and
Alarm Systems/Testing and Inspection/Programming and Relearning/ECM Re-Communicating Function/Special Repair Requirement/Without
Intelligent Key System (Without intelligent key system).
4. Perform See: Powertrain Management/Computers and Control Systems/Engine Control Module/Testing and Inspection.
5. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
6. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
7. [Flexible Fuel Vehicle]
Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle).
8. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
P0550
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 312
P0550 PSP SENSOR
Component Description
Power steering pressure (PSP) sensor (1) is installed to the power steering high-pressure tube and detects a power steering load. This sensor is a
potentiometer which transforms the power steering load into output voltage, and emits the voltage signal to the ECM. The
ECM controls the electric throttle control actuator and adjusts the throttle valve opening angle to increase the engine speed and adjusts the idle
speed for the increased load.
On Board Diagnosis Logic
The MIL will not light up for this self-diagnosis.
NOTE:
If DTC P0550 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. See: P0643.
DTC Confirmation Procedure
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and let it idle for at least 5 seconds.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to See: P0550.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK PSP SENSOR POWER SUPPLY CIRCUIT
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 313
1. Disconnect power steering pressure (PSP) sensor (1) harness connector.
2. Turn ignition switch ON.
3. Check voltage between PSP sensor terminal 1 and ground with
CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 3.
NG - Repair harness or connectors.
3.CHECK PSP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between PSP sensor terminal 3 and ECM terminal 67. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 4.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK PSP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 12 and PSP sensor terminal 2.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 5.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK PSP SENSOR
See: P0550.
OK or NG
OK - GO TO 6.
NG - Replace PSP sensor.
6.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
POWER STEERING PRESSURE SENSOR
1. Reconnect all harness connectors disconnected.
2. Start engine and let it idle.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 314
3. Check voltage between ECM terminal 12 and ground under the following conditions.
P0603
P0603 ECM POWER SUPPLY
Component Description
Battery voltage is supplied to the ECM even when the ignition switch is turned OFF for the ECM memory function of the DTC memory, the
air-fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc.
On Board Diagnosis Logic
DTC Confirmation Procedure
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and let it idle for 1 second.
3. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
4. Repeat steps 1 and 2 for 4 times.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to See: P0603.
Diagnosis Procedure
1.CHECK ECM POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 315
3. Check voltage between ECM terminal 121 and ground with
CONSULT-III or tester.
Voltage: Battery voltage
OK or NG
OK - GO TO 3.
NG - GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
- IPDM E/R connector E121
- 20A fuse
- Harness for open or short between ECM and battery
- Repair or replace harness or connectors.
3.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
OK or NG
OK - GO TO 4.
NG - Repair or replace harness or connectors.
4.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON.
2. Select "SELF DIAG RESULTS" mode with CONSULT-III.
3. Touch "ERASE".
4. Perform DTC Confirmation Procedure.
See See: P0603.
5. Is the 1st trip DTC P0603 displayed again?
With GST
1. Turn ignition switch ON.
2. Select Service $04 with GST.
3. Perform DTC Confirmation Procedure.
See See: P0603.
4. Is the 1st trip DTC P0603 displayed again?
Yes or No
Yes - GO TO 5.
No - INSPECTION END
5.REPLACE ECM
1. Replace ECM.
2. Perform initialization of NVIS(NATS) system and registration of all NVIS(NATS) ignition key IDs. See: Accessories and Optional
Equipment/Antitheft and Alarm Systems/Testing and Inspection/Programming and Relearning/ECM Re-Communicating Function/Special
Repair Requirement/With Intelligent Key System (With intelligent key system) or See: Accessories and Optional Equipment/Antitheft and
Alarm Systems/Testing and Inspection/Programming and Relearning/ECM Re-Communicating Function/Special Repair Requirement/Without
Intelligent Key System (Without intelligent key system).
3. Perform See: Powertrain Management/Computers and Control Systems/Engine Control Module/Testing and Inspection.
4. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
5. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
6. [Flexible Fuel Vehicle]
Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle).
7. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
P0605
P0605 ECM
Component Description
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 316
The ECM consists of a microcomputer and connectors for signal input and output and for power supply. The ECM controls the engine.
On Board Diagnosis Logic
This self-diagnosis has one or two trip detection logic.
FAIL-SAFE MODE
ECM enters fail-safe mode when the malfunction A is detected.
DTC Confirmation Procedure
Perform PROCEDURE FOR MALFUNCTION A first. If the 1st trip DTC cannot be confirmed, perform
PROCEDURE FOR MALFUNCTION B. If there is no malfunction on PROCEDURE FOR MALFUNCTION
B, perform PROCEDURE FOR MALFUNCTION C.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
PROCEDURE FOR MALFUNCTION A
1. Turn ignition switch ON.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to See: P0605.
PROCEDURE FOR MALFUNCTION B
1. Turn ignition switch ON and wait at least 1 second.
2. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to See: P0605
PROCEDURE FOR MALFUNCTION C
1. Turn ignition switch ON and wait at least 1 second.
2. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
3. Repeat step 2 for 32 times.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to See: P0605.
Diagnosis Procedure
1.INSPECTION START
With CONSULT-III
1. Turn ignition switch ON.
2. Select "SELF DIAG RESULTS" mode with CONSULT-III.
3. Touch "ERASE".
4. Perform DTC Confirmation Procedure.
See See: P0605.
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5. Is the 1st trip DTC P0605 displayed again?
With GST
1. Turn ignition switch ON.
2. Select Service $04 with GST.
3. Perform DTC Confirmation Procedure.
See See: P0605.
4. Is the 1st trip DTC P0605 displayed again?
Yes or No
Yes - GO TO 2.
No - INSPECTION END
2.REPLACE ECM
1. Replace ECM.
2. Perform initialization of NVIS(NATS) system and registration of all NVIS(NATS) ignition key IDs. See: Accessories and Optional
Equipment/Antitheft and Alarm Systems/Testing and Inspection/Programming and Relearning/ECM Re-Communicating Function/Special
Repair Requirement/With Intelligent Key System (With intelligent key system) or See: Accessories and Optional Equipment/Antitheft and
Alarm Systems/Testing and Inspection/Programming and Relearning/ECM Re-Communicating Function/Special Repair Requirement/Without
Intelligent Key System (Without intelligent key system).
3. Perform See: Powertrain Management/Computers and Control Systems/Engine Control Module/Testing and Inspection.
4. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
5. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
6. [Flexible Fuel Vehicle]
Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle).
7. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
P0607
P0607 ECM
Description
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with
high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control
unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
On Board Diagnosis Logic
This self-diagnosis has the one trip detection logic.
DTC Confirmation Procedure
1. Turn ignition switch ON.
2. Check DTC.
3. If DTC is detected, go to See: P0607.
Diagnosis Procedure
1.INSPECTION START
With CONSULT-III
1. Turn ignition switch ON.
2. Select "SELF-DIAG RESULTS" mode with CONSULT-III.
3. Touch "ERASE".
4. Perform DTC Confirmation Procedure.
See See: P0607.
5. Is the DTC P0607 displayed again?
With GST
1. Turn ignition switch ON.
2. Select Service $04 with GST.
3. Perform DTC Confirmation Procedure.
See See: P0607.
4. Is the DTC P0607 displayed again?
Yes or No
Yes - GO TO 2.
No - INSPECTION END
2.REPLACE ECM
1. Replace ECM.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 318
2. Perform initialization of NVIS(NATS) system and registration of all NVIS(NATS) ignition key IDs. See: Accessories and Optional
Equipment/Antitheft and Alarm Systems/Testing and Inspection/Programming and Relearning/ECM Re-Communicating Function/Special
Repair Requirement/With Intelligent Key System (With intelligent key system) or See: Accessories and Optional Equipment/Antitheft and
Alarm Systems/Testing and Inspection/Programming and Relearning/ECM Re-Communicating Function/Special Repair Requirement/Without
Intelligent Key System (Without intelligent key system).
3. Perform See: Powertrain Management/Computers and Control Systems/Engine Control Module/Testing and Inspection.
4. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
5. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
6. [Flexible Fuel Vehicle]
Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle).
7. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
P0615
P0615 STARTER RELAY
Description
TCM prohibits cranking other than at "P" or "N" position.
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is not an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0615" with CONSULT-III is detected when starter relay is switched "ON" other than at "P" or "N" position. (Or
when switched "OFF" at "P" or "N" position).
Possible Cause
- Harness or connectors
(The starter relay and TCM circuit is open or shorted.)
- Starter relay
DTC Confirmation Procedure
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start engine.
4. Drive vehicle for at least 2 consecutive seconds.
5. If DTC is detected, go to See: P0615.
Diagnosis Procedure
1.CHECK STARTER RELAY
With CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "SELECTION FROM MENU" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III and check monitor
"STARTER RELAY" ON/OFF.
Without CONSULT-III
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 319
1. Turn ignition switch "ON". (Do not start engine.)
2. Check voltage between the IPDM E/R connector and ground.
OK or NG
OK - GO TO 5.
NG - GO TO 2.
2.CHECK HARNESS BETWEEN A/T ASSEMBLY HARNESS CONNECTOR AND IPDM E/R CONNECTOR.
1. Turn ignition switch OFF.
2. Disconnect A/T assembly harness connector and IPDM E/R connector.
3. Check continuity between A/T assembly harness connector and
IPDM E/R connector.
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
OK - GO TO 3.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK TERMINAL CORD ASSEMBLY
1. Remove control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair
2. Disconnect A/T assembly harness connector and TCM connector.
3. Check continuity between A/T assembly harness connector terminal and TCM connector terminal.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 320
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
OK - GO TO 4.
NG - Replace open circuit or short to ground and short to power in harness or connectors.
4.DETECT MALFUNCTIONING ITEM
Check the following items:
- Starter relay, See: Starting and Charging/Starting System/Description and Operation/Starting System/System Description.
- IPDM E/R, See: Power and Ground Distribution/Power Distribution Module/Testing and Inspection/Pinout Values and Diagnostic
Parameters/Physical Values.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
5.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P0615.
OK or NG
OK - INSPECTION END
NG - GO TO 2.
P0643
P0643 SENSOR POWER SUPPLY
On Board Diagnosis Logic
This self-diagnosis has the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to See: P0643.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 321
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 7 and ground with
CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 5.
NG - GO TO 3.
3.CHECK SENSOR POWER SUPPLY CIRCUITS
Check harness for short to power and short to ground, between the following terminals.
OK or NG
OK - GO TO 4.
NG - Repair short to ground or short to power in harness or connectors.
4.CHECK COMPONENTS
Check the following.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 322
- EVAP control system pressure sensor ( See: P0452.)
- Power steering pressure sensor ( See: P0550.)
- Battery current sensor ( See: P1550.)
- Refrigerant pressure sensor ( See: Powertrain Management/Computers and Control Systems/Description and Operation/Refrigerant Pressure
Sensor.)
OK or NG
OK - GO TO 7.
NG - Replace malfunctioning components.
5.CHECK ACCELERATOR PEDAL POSITION SENSOR
See: P2138.
OK or NG
OK - GO TO 7.
NG - GO TO 6.
6.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal position assembly.
2. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
3. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
4. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
7.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
P0700
P0700 TRANSMISSION CONTROL
Description
The TCM consists of a microcomputer and connectors for signal input and output and for power supply. The
TCM controls the A/T.
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0700" with CONSULT-III is detected when the TCM is malfunctioning.
Possible Cause
TCM.
DTC Confirmation Procedure
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start engine.
4. Run engine for at least 2 consecutive seconds at idle speed.
5. If DTC is detected, go to See: P0700.
WITH GST
Follow the procedure "With CONSULT-III".
Diagnosis Procedure
1.CHECK DTC
With CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "SELF DIAG RESULTS" mode for "TRANSMISSION" with CONSULT-III.
3. Touch "ERASE".
4. Turn ignition switch "OFF" and wait at least 10 seconds.
5. Perform DTC Confirmation Procedure, See: P0700.
Is the "P0700" displayed again?
YES - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and
Repair.
NO - INSPECTION END
P0705
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 323
P0705 TRANSMISSION RANGE SWITCH A
Description
The transmission range switch detects the selector lever position and sends a signal to the TCM.
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0705" with CONSULT-III is detected under the following conditions.
- When TCM does not receive the correct voltage signal from the transmission range switch 1, 2, 3, 4 based on the gear position.
- When no other position but "P" position is detected from "N" position.
Possible Cause
- Harness or connectors
(The transmission range switch 1, 2, 3, 4 and TCM circuit is open or shorted.)
- Transmission range switch 1, 2, 3, 4
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "ENGINE" with CONSULT-III.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 2 consecutive seconds.
THRTL POS SEN: More than 1.2V
5. If DTC is detected, go to See: P0705.
WITH GST
Follow the procedure "With CONSULT-III".
Diagnosis Procedure
1.CHECK TRANSMISSION RANGE SWITCH CIRCUIT
With CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "SELECTION FROM MENU" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Check if correct selector lever position (N/P, R or D) is displayed as selector lever is moved into each position.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 324
OK or NG
OK - GO TO 5.
NG - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Perform TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTIONING ITEM
Check the following items:
- A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - GO TO 4.
NG - Repair or replace damaged parts.
4.CHECK SUB-HARNESS
1. Remove control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
2. Disconnect transmission range switch connector and TCM connector.
3. Check continuity between transmission range switch connector
(A) terminals and TCM connector (B) terminals.
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Replace open circuit or short to ground and short to power in harness or connectors.
5.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P0705.
OK or NG
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 325
OK - INSPECTION END
NG - GO TO 2.
P0717
P0717 INPUT SPEED SENSOR A
Description
The input speed sensor detects input shaft rpm (revolutions per minute). It is located on the input side of the automatic transmission. Monitors
revolution of sensor 1 and sensor 2 for non-standard conditions.
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0717" with CONSULT-III is detected under the following conditions.
- When TCM does not receive the proper voltage signal from the sensor.
- When TCM detects an irregularity only at position of 4GR for input speed sensor 2.
Possible Cause
- Harness or connectors
(The sensor circuit is open or shorted.)
- Input speed sensor 1, 2
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start engine and maintain the following conditions for at least 5 consecutive seconds.
VHCL/S SE-A/T: 40 km/h (25 MPH) or more
ENGINE SPEED: 1,500 rpm or more
ACCELE POSI: 0.5/8 or more
SLCT LVR POSI: "D" position
GEAR (Input speed sensor 1): 4th or 5th position
GEAR (Input speed sensor 2): All position
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.
4. If DTC is detected, go to See: P0717.
WITH GST
Follow the procedure "With CONSULT-III".
Diagnosis Procedure
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Vehicle start and read out the value of "TURBINE REV".
OK or NG
OK - GO TO 4.
NG - GO TO 2.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 326
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
4.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P0717.
OK or NG
OK - INSPECTION END
NG - GO TO 2.
P0720
P0720 OUTPUT SPEED SENSOR
Description
The output speed sensor detects the revolution of the idler gear parking pawl lock gear and emits a pulse signal. The pulse signal is sent to the
TCM which converts it into vehicle speed.
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0720" with CONSULT-III is detected under the following conditions.
- When TCM does not receive the proper voltage signal from the sensor.
- After ignition switch is turned "ON", irregular signal input from vehicle speed signal before the vehicle starts moving.
Possible Cause
- Harness or connectors
(The sensor circuit is open or shorted.)
- Output speed sensor
- Vehicle speed signal
DTC Confirmation Procedure
CAUTION:
- Always drive vehicle at a safe speed.
- Be careful not to rev engine into the red zone on the tachometer.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Drive vehicle and check for an increase of "VHCL/S SE-A/T" value in response to "VHCL/S SE.MTR" value.
If the check result is NG, go to See: P0720.
If the check result is OK, go to following step.
4. Select "DATA MONITOR" mode for "ENGINE" with CONSULT-III.
5. Start engine and maintain the following conditions for at least 5 consecutive seconds.
VHCL/S SE-A/T: 30 km/h (19 MPH) or more
ACCELE POSI: More than 1.0/8
SLCT LVR POSI: "D" position
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 327
If the check result is NG, go to See: P0720.
If the check result is OK, go to following step.
6. Maintain the following conditions for at least 5 consecutive seconds.
ENGINE SPEED: 3,500 rpm or more
ACCELE POSI: More than 1.0/8
SLCT LVR POSI: "D" position
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.
If the check result is NG, go to See: P0720.
WITH GST
Follow the procedure "With CONSULT-III".
Diagnosis Procedure
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch "ON".
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start the engine.
4. Read out the value of "VHCL/S SE稟/T" while driving. Check the value changes according to driving speed.
OK or NG
OK - GO TO 6.
NG - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - GO TO 4.
NG - Repair or replace damaged parts.
4.CHECK SUB-HARNESS
1. Remove control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
2. Disconnect transmission range switch connector and TCM connector.
3. Check continuity between transmission range switch connector
(A) terminals and TCM connector (B) terminals.
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4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
OK - GO TO 5.
NG - Replace open circuit or short to ground and short to power in harness or connectors.
5.REPLACE THE OUTPUT SPEED SENSOR AND CHECK DTC
1. Replace the output speed sensor. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and
Repair/Overhaul/Automatic Transmission/Disassembly.
2. Perform "DTC Confirmation Procedure". See: P0720.
OK or NG
OK - INSPECTION END
NG - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
6.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P0720.
OK or NG
OK - INSPECTION END
NG - GO TO 2.
P0725
P0725 ENGINE SPEED
Description
The engine speed signal is sent from the ECM to the TCM.
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is not an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0725" with CONSULT-III is detected when TCM does not receive the ignition signal from ECM during engine
cranking or running.
Possible Cause
Harness or connectors
(The ECM to the TCM circuit is open or shorted.)
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON" and select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
2. Start engine and maintain the following conditions for at least 10 consecutive seconds.
VHCL/S SE-A/T: 10 km/h (6 MPH) or more
ACCELE POSI: More than 1/8
SLCT LVR POSI: "D" position
3. If DTC is detected, go to See: P0725.
Diagnosis Procedure
1.CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures/CONSULT-III Function (Transmission).
Is a malfunction in the CAN communication indicated in the results?
YES - Check CAN communication line. See: U Code Charts/U1000/TM.
NO - GO TO 2.
2.CHECK DTC WITH TCM
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 329
With CONSULT-III
1. Start engine.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. While monitoring engine speed, check for engine speed change corresponding to wide-open throttle position signal.
OK or NG
OK - GO TO 3.
NG - Check the ignition signal circuit. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests
and General Diagnostics/Ignition Signal/Diagnosis Procedure.
3.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P0725.
OK or NG
OK - INSPECTION END
NG - GO TO 4.
4.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 5.
NG - Repair or replace damaged parts.
5.DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
P0731
P0731 1GR INCORRECT RATIO
Description
This malfunction is detected when the A/T does not shift into 1GR position as instructed by TCM. This is not only caused by electrical
malfunction (circuits open or shorted) but also by mechanical malfunction such as control valve sticking, improper solenoid valve operation.
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0731 A/T 1ST GR FNCTN" is detected when TCM detects any inconsistency in the actual gear ratio.
Possible Cause
- Harness or connectors
(Solenoid circuits are open or shorted.)
- Input clutch solenoid valve
- Front brake solenoid valve
- Direct clutch solenoid valve
- High and low reverse clutch solenoid valve
- Each clutch
- Hydraulic control circuit
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Start the engine and select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
2. Make sure that "ATF TEMP 1" is within the following range.
ATF TEMP 1: 20癈 - 140癈
If out of range, drive vehicle to warm ATF or stop engine to cool ATF.
3. Select "1ST GR FNCTN P0731" of "DTC WORK SUPPORT" mode for "TRANSMISSION" with CONSULT-III.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 330
4. Drive vehicle and maintain the following conditions.
VEHICLE SPEED: 10 km/h (6 MPH) or more
ACCELE POSI: 0.6/8 or more
ENGINE SPEED: INPUT SPEED - 50 rpm or more
INPUT SPEED: 300 rpm or more
GEAR: "1" position
MANU MODE SW: ON
5. Keep the current driving status for at least 5 consecutive seconds if CONSULT-III screen changes from "OUT OF CONDITION" to
"TESTING".
CAUTION:
If "TESTING" does not appear on CONSULT-III for a long time, select "SELF-DIAG RESULTS". In case a 1st trip DTC other than
P0731 is shown, refer to " See: ".
If "COMPLETED RESULT NG" is detected, go to See: P0731.
If "STOP VEHICLE" is detected, go to the following step.
6. Stop vehicle.
7. Drive vehicle in "D" position allowing it to shift from 1GR to 5GR and check shift timing and shift shock.
- Touch "OK" to complete the inspection when normally shifted from 1GR to 5GR.
- Touch "NG" when an unusual shift shock, etc. occurs in spite of shifting from 1GR to 5GR. Go to See: Powertrain Management/Transmission
Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Road Test/Description.
- Perform See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/CONSULT-III
Function (Transmission) when not shifted from 1GR to 5GR. (Neither "OK" nor "NG" are indicated.)
Diagnosis Procedure
1.CHECK CAN COMMUNICATION LINE
Perform self-diagnosis. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures/CONSULT-III Function (Transmission).
Is a malfunction in the CAN communication indicated in the results?
YES - Check CAN communication line. See: U Code Charts/U1000/TM.
NO - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTION ITEM
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - GO TO 4.
NG - Repair or replace damaged parts.
4.REPLACE CONTROL VALVE WITH TCM
1. Replace control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
2. Perform See: P0731.
OK or NG
OK - INSPECTION END
NG - Confirm malfunction phenomena by "ROAD TEST" to repair malfunctioning part. See: Powertrain Management/Transmission Control
Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Road Test/Description.
P0732
P0732 2GR INCORRECT RATIO
Description
This malfunction is detected when the A/T does not shift into 2GR position as instructed by TCM. This is not only caused by electrical
malfunction (circuits open or shorted) but also by mechanical malfunction such as control valve sticking, improper solenoid valve operation.
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0732 A/T 2ND GR FNCTN" detected when TCM detects any inconsistency in the actual gear ratio.
Possible Cause
- Harness or connectors
(Solenoid circuits are open or shorted.)
- Input clutch solenoid valve
- Front brake solenoid valve
- Direct clutch solenoid valve
- High and low reverse clutch solenoid valve
- Each clutch
- Hydraulic control circuit
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 331
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Start the engine and select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
2. Make sure that "ATF TEMP 1" is within the following range.
ATF TEMP 1: 20癈 - 140癈
If out of range, drive vehicle to warm ATF or stop engine to cool ATF.
3. Select "2ND GR FNCTN P0732" of "DTC WORK SUPPORT" mode for "TRANSMISSION" with CONSULT-III.
4. Drive vehicle and maintain the following conditions.
VEHICLE SPEED: 10 km/h (6 MPH) or more
ACCELE POSI: 0.6/8 or more
ENGINE SPEED: INPUT SPEED - 50 rpm or more
INPUT SPEED: 300 rpm or more
GEAR: "2" position
MANU MODE SW: ON
5. Keep the current driving status for at least 5 consecutive seconds if CONSULT-III screen changes from "OUT OF CONDITION" to
"TESTING".
CAUTION:
If "TESTING" does not appear on CONSULT-III for a long time, select "SELF-DIAG RESULTS". In case a 1st trip DTC other than
P0732 is shown, refer to " See: ".
If "COMPLETED RESULT NG" is detected, go to See: P0732.
If "STOP VEHICLE" is detected, go to the following step.
6. Stop vehicle.
7. Drive vehicle in "D" position allowing it to shift from 1GR to 5GR and check shift timing and shift shock.
- Touch "OK" to complete the inspection when normally shifted from 1GR to 5GR.
- Touch "NG" when an unusual shift shock, etc. occurs in spite of shifting from 1GR to 5GR. Go to See: Powertrain Management/Transmission
Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Road Test/Description.
- Perform See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/CONSULT-III
Function (Transmission) when not shifted from 1GR to 5GR. (Neither "OK" nor "NG" are indicated.)
Diagnosis Procedure
1.CHECK CAN COMMUNICATION LINE
Perform self-diagnosis. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures/CONSULT-III Function (Transmission).
Is a malfunction in the CAN communication indicated in the results?
YES - Check CAN communication line. See: U Code Charts/U1000/TM.
NO - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTION ITEM
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - GO TO 4.
NG - Repair or replace damaged parts.
4.REPLACE CONTROL VALVE WITH TCM
1. Replace control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
2. Perform See: P0732.
OK or NG
OK - INSPECTION END
NG - Confirm malfunction phenomena by "ROAD TEST" to repair malfunctioning part. See: Powertrain Management/Transmission Control
Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Road Test/Description.
P0733
P0733 3GR INCORRECT RATIO
Description
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 332
This malfunction is detected when the A/T does not shift into 3GR position as instructed by TCM. This is not only caused by electrical
malfunction (circuits open or shorted) but also by mechanical malfunction such as control valve sticking, improper solenoid valve operation.
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0733 A/T 3RD GR FNCTN" is detected when TCM detects any inconsistency in the actual gear ratio.
Possible Cause
- Harness or connectors
(Solenoid circuits are open or shorted.)
- Input clutch solenoid valve
- Front brake solenoid valve
- Direct clutch solenoid valve
- High and low reverse clutch solenoid valve
- Each clutch
- Hydraulic control circuit
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Start the engine and select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
2. Make sure that "ATF TEMP 1" is within the following range.
ATF TEMP 1: 20癈 - 140癈
If out of range, drive vehicle to warm ATF or stop engine to cool ATF.
3. Select "3RD GR FNCTN P0733" of "DTC WORK SUPPORT" mode for "TRANSMISSION" with CONSULT-III.
4. Drive vehicle and maintain the following conditions.
VEHICLE SPEED: 10 km/h (6 MPH) or more
ACCELE POSI: 0.6/8 or more
ENGINE SPEED: INPUT SPEED - 50 rpm or more
INPUT SPEED: 300 rpm or more
GEAR: "3" position
MANU MODE SW: ON
5. Keep the current driving status for at least 5 consecutive seconds if CONSULT-III screen changes from "OUT OF CONDITION" to
"TESTING".
CAUTION:
If "TESTING" does not appear on CONSULT-III for a long time, select "SELF-DIAG RESULTS". In case a 1st trip DTC other than
P0732 is shown, refer to " See: ".
If "COMPLETED RESULT NG" is detected, go to See: P0733.
If "STOP VEHICLE" is detected, go to the following step.
6. Stop vehicle.
7. Drive vehicle in "D" position allowing it to shift from 1GR to 5GR and check shift timing and shift shock.
- Touch "OK" to complete the inspection when normally shifted from 1GR to 5GR.
- Touch "NG" when an unusual shift shock, etc. occurs in spite of shifting from 1GR to 5GR. Go to See: Powertrain Management/Transmission
Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Road Test/Description.
- Perform See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/CONSULT-III
Function (Transmission) when not shifted from 1GR to 5GR. (Neither "OK" nor "NG" are indicated.)
Diagnosis Procedure
1.CHECK CAN COMMUNICATION LINE
Perform self-diagnosis. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures/CONSULT-III Function (Transmission).
Is a malfunction in the CAN communication indicated in the results?
YES - Check CAN communication line. See: U Code Charts/U1000/TM.
NO - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTION ITEM
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 333
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - GO TO 4.
NG - Repair or replace damaged parts.
4.REPLACE CONTROL VALVE WITH TCM
1. Replace control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
2. Perform See: P0733.
OK or NG
OK - INSPECTION END
NG - Confirm malfunction phenomena by "ROAD TEST" to repair malfunctioning part. See: Powertrain Management/Transmission Control
Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Road Test/Description.
P0734
P0734 4GR INCORRECT RATIO
Description
This malfunction is detected when the A/T does not shift into 4GR position as instructed by TCM. This is not only caused by electrical
malfunction (circuits open or shorted) but also by mechanical malfunction such as control valve sticking, improper solenoid valve operation.
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0734 A/T 4TH GR FNCTN" is detected when TCM detects any inconsistency in the actual gear ratio.
Possible Cause
- Harness or connectors
(Solenoid circuits are open or shorted.)
- Input clutch solenoid valve
- Front brake solenoid valve
- Direct clutch solenoid valve
- High and low reverse clutch solenoid valve
- Each clutch
- Hydraulic control circuit
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Start the engine and select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
2. Make sure that "ATF TEMP 1" is within the following range.
ATF TEMP 1: 20癈 - 140癈
If out of range, drive vehicle to warm ATF or stop engine to cool ATF.
3. Select "4TH GR FNCTN P0734" of "DTC WORK SUPPORT" mode for "TRANSMISSION" with CONSULT-III.
4. Drive vehicle and maintain the following conditions.
VEHICLE SPEED: 10 km/h (6 MPH) or more
ACCELE POSI: 0.6/8 or more
ENGINE SPEED: INPUT SPEED - 50 rpm or more
INPUT SPEED: 300 rpm or more
GEAR: "4" position
MANU MODE SW: ON
5. Keep the current driving status for at least 5 consecutive seconds if CONSULT-III screen changes from "OUT OF CONDITION" to
"TESTING".
CAUTION:
If "TESTING" does not appear on CONSULT-III for a long time, select "SELF-DIAG RESULTS". In case a 1st trip DTC other than
P0734 is shown, refer to " See: ".
If "COMPLETED RESULT NG" is detected, go to See: P0734.
If "STOP VEHICLE" is detected, go to the following step.
6. Stop vehicle.
7. Drive vehicle in "D" position allowing it to shift from 1GR to 5GR and check shift timing and shift shock.
- Touch "OK" to complete the inspection when normally shifted from 1GR to 5GR.
- Touch "NG" when an unusual shift shock, etc. occurs in spite of shifting from 1GR to 5GR. Go to See: Powertrain Management/Transmission
Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Road Test/Description.
- Perform See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/CONSULT-III
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 334
Function (Transmission) when not shifted from 1GR to 5GR. (Neither "OK" nor "NG" are indicated.)
Diagnosis Procedure
1.CHECK CAN COMMUNICATION LINE
Perform self-diagnosis. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures/CONSULT-III Function (Transmission).
Is a malfunction in the CAN communication indicated in the results?
YES - Check CAN communication line. See: U Code Charts/U1000/TM.
NO - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTION ITEM
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - GO TO 4.
NG - Repair or replace damaged parts.
4.REPLACE CONTROL VALVE WITH TCM
1. Replace control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
2. Perform See: P0734.
OK or NG
OK - INSPECTION END
NG - Confirm malfunction phenomena by "ROAD TEST" to repair malfunctioning part. See: Powertrain Management/Transmission Control
Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Road Test/Description.
P0735
P0735 5GR INCORRECT RATIO
Description
This malfunction is detected when the A/T does not shift into 5GR position as instructed by TCM. This is not only caused by electrical
malfunction (circuits open or shorted) but also by mechanical malfunction such as control valve sticking, improper solenoid valve operation.
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0735 A/T 5TH GR FNCTN" is detected when TCM detects any inconsistency in the actual gear ratio.
Possible Cause
- Harness or connectors
(Solenoid circuits are open or shorted.)
- Input clutch solenoid valve
- Front brake solenoid valve
- Direct clutch solenoid valve
- High and low reverse clutch solenoid valve
- Each clutch
- Hydraulic control circuit
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Start the engine and select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
2. Make sure that "ATF TEMP 1" is within the following range.
ATF TEMP 1: 20癈 - 140癈
If out of range, drive vehicle to warm ATF or stop engine to cool ATF.
3. Select "5TH GR FNCTN P0735" of "DTC WORK SUPPORT" mode for "TRANSMISSION" with CONSULT-III.
4. Drive vehicle and maintain the following conditions.
VEHICLE SPEED: 10 km/h (6 MPH) or more
ACCELE POSI: 0.6/8 or more
ENGINE SPEED: INPUT SPEED - 50 rpm or more
INPUT SPEED: 300 rpm or more
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 335
GEAR: "5" position
MANU MODE SW: ON
5. Keep the current driving status for at least 5 consecutive seconds if CONSULT-III screen changes from "OUT OF CONDITION" to
"TESTING".
CAUTION:
If "TESTING" does not appear on CONSULT-III for a long time, select "SELF-DIAG RESULTS". In case a 1st trip DTC other than
P0735 is shown, refer to " See: ".
If "COMPLETED RESULT NG" is detected, go to See: P0735.
If "STOP VEHICLE" is detected, go to the following step.
6. Stop vehicle.
7. Drive vehicle in "D" position allowing it to shift from 1GR to 5GR and check shift timing and shift shock.
- Touch "OK" to complete the inspection when normally shifted from 1GR to 5GR.
- Touch "NG" when an unusual shift shock, etc. occurs in spite of shifting from 1GR to 5GR. Go to See: Powertrain Management/Transmission
Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Road Test/Description.
- Perform See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/CONSULT-III
Function (Transmission) when not shifted from 1GR to 5GR. (Neither "OK" nor "NG" are indicated.)
Diagnosis Procedure
1.CHECK CAN COMMUNICATION LINE
Perform self-diagnosis. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures/CONSULT-III Function (Transmission).
Is a malfunction in the CAN communication indicated in the results?
YES - Check CAN communication line. See: U Code Charts/U1000/TM.
NO - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTION ITEM
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - GO TO 4.
NG - Repair or replace damaged parts.
4.REPLACE CONTROL VALVE WITH TCM
1. Replace control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
2. Perform See: P0735.
OK or NG
OK - INSPECTION END
NG - Confirm malfunction phenomena by "ROAD TEST" to repair malfunctioning part. See: Powertrain Management/Transmission Control
Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Road Test/Description.
P0740
P0740 TORQUE CONVERTER
Description
- The torque converter clutch solenoid valve is activated, with the gear in D4, D5 by the TCM in response to signals sent from the vehicle speed
sensor and accelerator pedal position sensor. Torque converter clutch piston operation will then be controlled.
- Lock-up operation, however, is prohibited when A/T fluid temperature is too low.
- When the accelerator pedal is depressed (less than 1.0/8) in lock-up condition, the engine speed should not change abruptly. If there is a big
jump in engine speed, there is no lock-up.
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0740" with CONSULT-III is detected under the following conditions.
- When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
- When TCM detects as irregular by comparing target value with monitor value.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 336
Possible Cause
- Torque converter clutch solenoid valve
- Harness or connectors
(The solenoid circuit is open or shorted.)
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "ENGINE" with CONSULT-III.
3. Start engine and maintain the following conditions for at least 5 consecutive seconds.
VHCL/S SE-A/T: 80 km/h (50 MPH) or more
ACCELE POSI: 0.5/8 - 1.0/8
SLCT LVR POSI: "D" position
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.
4. If DTC is detected go to See: P0740.
WITH GST
Follow the procedure "With CONSULT-III".
Diagnosis Procedure
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch "ON".
2. Select "MAIN SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start engine.
4. Read out the value of "TCC SOLENOID" while driving.
OK or NG
OK - GO TO 4.
NG - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
4.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P0740.
OK or NG
OK - INSPECTION END
NG - GO TO 2.
P0744
P0744 TORQUE CONVERTER
Description
This malfunction is detected when the A/T does not shift into 5GR position or the torque converter clutch does not lock-up as instructed by the
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 337
TCM. This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical malfunction such as control valve
sticking, improper solenoid valve operation, etc.
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0744" with CONSULT-III is detected under the following conditions.
- When A/T cannot perform lock-up even if electrical circuit is good.
- When TCM detects as irregular by comparing difference value with slip rotation.
Possible Cause
- Harness or connectors
(The solenoid circuit is open or shorted.)
- Torque converter clutch solenoid valve
- Hydraulic control circuit
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Start engine and Select "TCC S/V FNCTN CHECK" of "DTC WORK SUPPORT" mode for "TRANSMISSION" with CONSULT-III and
touch "START".
2. Accelerate vehicle to more than 80 km/h (50 MPH) and maintain the following condition continuously until "TESTING" has turned to
"COMPLETE". (It will take approximately 30 seconds after "TESTING" shows.)
ACCELE POSI: More than 1.0/8 (at all times during step 4)
TCC SOLENOID: 0.4 - 0.6 A
SLCT LVR POSI: "D" position
[Reference speed: Constant speed of more than 80 km/h (50 MPH)]
- Make sure "GEAR" shows "5".
- For shift schedule, See: Powertrain Management/Transmission Control Systems/Specifications/Mechanical Specifications/Vehicle
Speed At Which Lock-Up Occurs/Releases.
- If "TESTING" does not appear on CONSULT-III for a long time, select "SELF-DIAG RESULTS". In case a 1st trip DTC other than
P0744 is shown, refer to applicable "TROUBLE DIAGNOSIS FOR
DTC".
3. Make sure that "OK" is displayed. (If "NG" is displayed, refer to "DIAGNOSTIC PROCEDURE".)
See: P0744. Refer to shift schedule, See: Powertrain Management/Transmission Control Systems/Specifications/Mechanical
Specifications/Vehicle Speed At Which Lock-Up Occurs/Releases.
WITH GST
Follow the procedure "With CONSULT-III".
Diagnosis Procedure
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch "ON".
2. Select "MAIN SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start the engine.
4. Read out the value of "TCC SOLENOID" while driving.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 338
OK or NG
OK - GO TO 4.
NG - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
4.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P0744.
OK or NG
OK - INSPECTION END
NG - GO TO 2.
P0745
P0745 PRESSURE CONTROL SOLENOID A
Description
The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the TCM.
The line pressure duty cycle value is not consistent when the closed throttle position signal is "ON".
To confirm the line pressure duty cycle at low pressure, the accelerator (throttle) should be open until the closed throttle position signal is
"OFF".
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0745" with CONSULT-III is detected under the following conditions.
- When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
- When TCM detects as irregular by comparing target value with monitor value.
Possible Cause
- Harness or connectors
(The solenoid circuit is open or shorted.)
- Line pressure solenoid valve
DTC Confirmation Procedure
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON" and select "DATA MONITOR" mode for "ENGINE" with CONSULT-III.
2. Engine start and wait at least 5 second.
3. If DTC is detected, go to See: P0745.
WITH GST
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Follow the procedure "With CONSULT-III".
Diagnosis Procedure
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch "ON".
2. Select "MAIN SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start the engine.
4. Read out the value of "LINE PRES SOL" while driving.
OK or NG
OK - GO TO 4.
NG - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
4.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P0745.
OK or NG
OK - INSPECTION END
NG - GO TO 2.
P0850
P0850 PNP SWITCH
Component Description
When the selector lever position is P or N, park/neutral position (PNP) signal from the TCM is sent to ECM.
When the gear position is P or N, transmission range switch is ON.
On Board Diagnosis Logic
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
WITH CONSULT-III
1. Turn ignition switch ON.
2. Select "P/N POSI SW" in "DATA MONITOR" mode with CONSULT-III. Then check the "P/N POSI SW" signal under the following
conditions.
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If NG, go to See: P0850.
If OK, go to following step.
3. Select "DATA MONITOR" mode with CONSULT-III.
4. Start engine and warm it up to normal operating temperature.
5. Maintain the following conditions for at least 60 consecutive seconds.
6. Check 1st trip DTC.
7. If 1st trip DTC is detected, go to See: P0850.
Overall Function Check
Use this procedure to check the overall function of the park/neutral position (PNP) signal circuit. During this check, a 1st trip DTC might not be
confirmed.
WITH GST
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 102 (PNP signal) and ground under the following conditions.
3. If NG, go to See: P0850.
Diagnosis Procedure
1.CHECK DTC WITH TCM
See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/OBD-II
Diagnostic Trouble Code (DTC).
OK or NG
OK - GO TO 2.
NG - Repair or replace.
2.CHECK STARTING SYSTEM
Turn ignition switch OFF, then turn it to START.
Does starter motor operate?
Yes or No
Yes - GO TO 3.
No - See: Starting and Charging/Starting System/Description and Operation/Starting System/System Diagram.
3.CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
2. Disconnect A/T assembly harness connector.
3. Disconnect combination meter harness connector.
4. Check harness continuity between A/T assembly terminal 9 and combination meter terminal 39. Refer to Wiring Diagram.
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Continuity should exist.
5. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 5.
NG - GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F14, E5
- Harness connectors E152, M31
- Harness for open or short between A/T assembly and combination meter
- Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 102 and combination meter terminal 40. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 7.
NG - GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M31, E152
- Harness for open or short between ECM and combination meter
- Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-III
1. Check harness continuity between A/T assembly terminal 9 and TCM terminal 8. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 8.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
OK or NG
OK - GO TO 9.
NG - Repair or replace.
9.REPLACE COMBINATION METER
See: Instrument Panel, Gauges and Warning Indicators/Instrument Cluster / Carrier/Service and Repair.
- INSPECTION END
P1140
P1140, P1145 IVT CONTROL POSITION SENSOR
Component Description
Intake valve timing control position sensors are located in the front of cylinder heads in both bank 1 and bank 2.
This sensor uses a Hall IC.
The cam position is determined by the intake camshaft sprocket concave (in four places). The ECM provides feedback to the intake valve timing
control for appropriate target valve open-close timing according to drive conditions based on detected cam position.
On Board Diagnosis Logic
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DTC Confirmation Procedure
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Maintain the following conditions for at least 10 seconds.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to See: P1140.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Power Supply
And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT
1. Disconnect intake valve timing control position sensor harness connector.
2. Turn ignition switch ON.
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3. Check voltage between intake valve timing control position sensor terminal 3 and ground with CONSULT-III or tester.
Voltage: Battery voltage
OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- Harness for open or short between intake valve timing control position sensor and IPDM E/R
- Harness for open or short between intake valve timing control position sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR GROUND CIRCUIT FOR OPEN AND
SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between intake valve timing control position sensor terminal 1 and ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK - GO TO 6.
NG - GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- Harness for open or short between intake valve timing control position sensor and ground
- Repair open circuit or short to power in harness or connectors.
6.CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN
AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between the following;
ECM terminal 72 and intake valve timing control position sensor (Bank 1) terminal 2 or
ECM terminal 53 and intake valve timing control position sensor (Bank 2) terminal 2. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 7.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR
See: P1140.
OK or NG
OK - GO TO 8.
NG - Replace malfunctioning intake valve timing control position sensor. See: Engine, Cooling and Exhaust/Engine/Sensors and Switches -
Engine/Variable Valve Timing Actuator Position Sensor/Service and Repair/Intake Valve Timing Control Position Sensor (LH) See: Engine,
Cooling and Exhaust/Engine/Sensors and Switches - Engine/Variable Valve Timing Actuator Position Sensor/Service and Repair/Intake Valve
Timing Control Position Sensor (RH) See: Engine, Cooling and Exhaust/Engine/Sensors and Switches - Engine/Variable Valve Timing Actuator
Position Sensor/Service and Repair/Camshaft Position Sensor (Phase).
8.CHECK CRANKSHAFT POSITION SENSOR (POS)
See: P0335.
OK or NG
OK - GO TO 9.
NG - Replace crankshaft position sensor (POS).
9.CHECK CAMSHAFT POSITION SENSOR (PHASE)
See: P0340.
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OK or NG
OK - GO TO 10.
NG - Replace camshaft position sensor (PHASE). See: Engine, Cooling and Exhaust/Engine/Sensors and Switches - Engine/Variable Valve
Timing Actuator Position Sensor/Service and Repair/Intake Valve Timing Control Position Sensor (LH) See: Engine, Cooling and
Exhaust/Engine/Sensors and Switches - Engine/Variable Valve Timing Actuator Position Sensor/Service and Repair/Intake Valve Timing Control
Position Sensor (RH) See: Engine, Cooling and Exhaust/Engine/Sensors and Switches - Engine/Variable Valve Timing Actuator Position
Sensor/Service and Repair/Camshaft Position Sensor (Phase).
10.CHECK CAMSHAFT SPROCKET
Check accumulation of debris to the signal pick-up portion of the camshaft sprocket. See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters
and Push Rods/Camshaft/Service and Repair/Removal And Installation.
OK or NG
OK - GO TO 11.
NG - Remove debris and clean the signal pick-up cutout of camshaft sprocket.
11.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
INTAKE VALVE TIMING CONTROL POSITION SENSOR
1. Disconnect intake valve timing control position sensor harness connector.
2. Loosen the fixing bolt of the sensor.
3. Remove the sensor.
4. Visually check the sensor for chipping.
5. Check resistance as shown below.
6. If NG, replace intake valve timing control position sensor. See: Engine, Cooling and Exhaust/Engine/Sensors and Switches - Engine/Variable
Valve Timing Actuator Position Sensor/Service and Repair/Intake Valve Timing Control Position Sensor (LH) See: Engine, Cooling and
Exhaust/Engine/Sensors and Switches - Engine/Variable Valve Timing Actuator Position Sensor/Service and Repair/Intake Valve Timing
Control Position Sensor (RH) See: Engine, Cooling and Exhaust/Engine/Sensors and Switches - Engine/Variable Valve Timing Actuator
Position Sensor/Service and Repair/Camshaft Position Sensor (Phase).
P1145
P1140, P1145 IVT CONTROL POSITION SENSOR
Component Description
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 345
Intake valve timing control position sensors are located in the front of cylinder heads in both bank 1 and bank 2.
This sensor uses a Hall IC.
The cam position is determined by the intake camshaft sprocket concave (in four places). The ECM provides feedback to the intake valve timing
control for appropriate target valve open-close timing according to drive conditions based on detected cam position.
On Board Diagnosis Logic
DTC Confirmation Procedure
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Maintain the following conditions for at least 10 seconds.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to See: P1140.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Power Supply
And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT
1. Disconnect intake valve timing control position sensor harness connector.
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2. Turn ignition switch ON.
3. Check voltage between intake valve timing control position sensor terminal 3 and ground with CONSULT-III or tester.
Voltage: Battery voltage
OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- Harness for open or short between intake valve timing control position sensor and IPDM E/R
- Harness for open or short between intake valve timing control position sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR GROUND CIRCUIT FOR OPEN AND
SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between intake valve timing control position sensor terminal 1 and ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK - GO TO 6.
NG - GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- Harness for open or short between intake valve timing control position sensor and ground
- Repair open circuit or short to power in harness or connectors.
6.CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN
AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between the following;
ECM terminal 72 and intake valve timing control position sensor (Bank 1) terminal 2 or
ECM terminal 53 and intake valve timing control position sensor (Bank 2) terminal 2. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 7.
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NG - Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR
See: P1140.
OK or NG
OK - GO TO 8.
NG - Replace malfunctioning intake valve timing control position sensor. See: Engine, Cooling and Exhaust/Engine/Sensors and Switches -
Engine/Variable Valve Timing Actuator Position Sensor/Service and Repair/Intake Valve Timing Control Position Sensor (LH) See: Engine,
Cooling and Exhaust/Engine/Sensors and Switches - Engine/Variable Valve Timing Actuator Position Sensor/Service and Repair/Intake Valve
Timing Control Position Sensor (RH) See: Engine, Cooling and Exhaust/Engine/Sensors and Switches - Engine/Variable Valve Timing Actuator
Position Sensor/Service and Repair/Camshaft Position Sensor (Phase).
8.CHECK CRANKSHAFT POSITION SENSOR (POS)
See: P0335.
OK or NG
OK - GO TO 9.
NG - Replace crankshaft position sensor (POS).
9.CHECK CAMSHAFT POSITION SENSOR (PHASE)
See: P0340.
OK or NG
OK - GO TO 10.
NG - Replace camshaft position sensor (PHASE). See: Engine, Cooling and Exhaust/Engine/Sensors and Switches - Engine/Variable Valve
Timing Actuator Position Sensor/Service and Repair/Intake Valve Timing Control Position Sensor (LH) See: Engine, Cooling and
Exhaust/Engine/Sensors and Switches - Engine/Variable Valve Timing Actuator Position Sensor/Service and Repair/Intake Valve Timing Control
Position Sensor (RH) See: Engine, Cooling and Exhaust/Engine/Sensors and Switches - Engine/Variable Valve Timing Actuator Position
Sensor/Service and Repair/Camshaft Position Sensor (Phase).
10.CHECK CAMSHAFT SPROCKET
Check accumulation of debris to the signal pick-up portion of the camshaft sprocket. See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters
and Push Rods/Camshaft/Service and Repair/Removal And Installation.
OK or NG
OK - GO TO 11.
NG - Remove debris and clean the signal pick-up cutout of camshaft sprocket.
11.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
INTAKE VALVE TIMING CONTROL POSITION SENSOR
1. Disconnect intake valve timing control position sensor harness connector.
2. Loosen the fixing bolt of the sensor.
3. Remove the sensor.
4. Visually check the sensor for chipping.
5. Check resistance as shown below.
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6. If NG, replace intake valve timing control position sensor. See: Engine, Cooling and Exhaust/Engine/Sensors and Switches - Engine/Variable
Valve Timing Actuator Position Sensor/Service and Repair/Intake Valve Timing Control Position Sensor (LH) See: Engine, Cooling and
Exhaust/Engine/Sensors and Switches - Engine/Variable Valve Timing Actuator Position Sensor/Service and Repair/Intake Valve Timing
Control Position Sensor (RH) See: Engine, Cooling and Exhaust/Engine/Sensors and Switches - Engine/Variable Valve Timing Actuator
Position Sensor/Service and Repair/Camshaft Position Sensor (Phase).
P1148
P1148, P1168 CLOSED LOOP CONTROL
On Board Diagnosis Logic
These self-diagnoses have the one trip detection logic.
DTC P1148 or P1168 is displayed with another DTC for air fuel ratio (A/F) sensor 1.
Perform the trouble diagnosis for the corresponding DTC.
P1168
P1148, P1168 CLOSED LOOP CONTROL
On Board Diagnosis Logic
These self-diagnoses have the one trip detection logic.
DTC P1148 or P1168 is displayed with another DTC for air fuel ratio (A/F) sensor 1.
Perform the trouble diagnosis for the corresponding DTC.
P1211
P1211 TCS CONTROL UNIT
Description
The malfunction information related to TCS is transferred through the CAN communication line from "ABS actuator and electric unit (control
unit)" to ECM.
Be sure to erase the malfunction information such as DTC not only for "ABS actuator and electric unit
(control unit)" but also for ECM after TCS related repair.
On Board Diagnosis Logic
Freeze frame data is not stored in the ECM for this self-diagnosis.
The MIL will not light up for this self-diagnosis.
DTC Confirmation Procedure
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5 V at idle.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 349
1. Start engine and let it idle for at least 60 seconds.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to See: P1211.
Diagnosis Procedure
Go to See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Scan Tool Testing and Procedures.
P1212
P1212 TCS COMMUNICATION LINE
Description
NOTE:
- If DTC P1212 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
- If DTC P1212 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. See: P0607.
This CAN communication line is used to control the smooth engine operation during the TCS operation. Pulse signals are exchanged between
ECM and "ABS actuator and electric unit (control unit)".
Be sure to erase the malfunction information such as DTC not only for "ABS actuator and electric unit
(control unit)" but also for ECM after TCS related repair.
On Board Diagnosis Logic
Freeze frame data is not stored in the ECM for this self-diagnosis.
The MIL will not light up for this self-diagnosis.
DTC Confirmation Procedure
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5 V at idle.
1. Start engine and let it idle for at least 10 seconds.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to See: P1212.
Diagnosis Procedure
Go to See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Scan Tool Testing and Procedures.
P1217
P1217 ENGINE OVER TEMPERATURE
On Board Diagnosis Logic
NOTE:
- If DTC P1217 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
- If DTC P1217 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. See: P0607.
If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will rise.
When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is indicated.
This self-diagnosis has the one trip detection logic.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 350
CAUTION:
When a malfunction is indicated, be sure to replace the coolant. See: Engine, Cooling and Exhaust/Cooling System/Coolant/Service and
Repair/Changing Engine Coolant. Also, replace the engine oil. See: Engine, Cooling and Exhaust/Engine/Engine Lubrication/Engine
Oil/Service and Repair/Removal and Replacement.
1. Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Be sure to use coolant with the proper mixture
ratio. See: Engine, Cooling and Exhaust/Cooling System/Coolant/Service and Repair/Inspection.
2. After refilling coolant, run engine to ensure that no water-flow noise is emitted.
Overall Function Check
Use this procedure to check the overall function of the cooling fan. During this check, a DTC might not be confirmed.
WARNING:
Never remove the radiator cap and/or reservoir tank cap when the engine is hot. Serious burns could be caused by high pressure fluid
escaping from the radiator and/or reservoir tank.
Wrap a thick cloth around cap. Carefully remove the cap by turning it a quarter turn to allow built-up pressure to escape. Then turn the
cap all the way off.
WITH CONSULT-III
1. Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below the proper range, skip the following steps and go to See: Engine, Cooling and
Exhaust/Cooling System/Testing and Inspection/Component Tests and General Diagnostics/Diagnosis Procedure.
2. Confirm whether customer filled the coolant or not. If customer filled the coolant, skip the following steps and go to See: Engine, Cooling and
Exhaust/Cooling System/Testing and Inspection/Component Tests and General Diagnostics/Diagnosis Procedure.
3. Turn ignition switch ON.
4. Perform "COOLING FAN" in "ACTIVE TEST" mode with CONSULT-III.
5. If the results are NG, go to See: Engine, Cooling and Exhaust/Cooling System/Testing and Inspection/Component Tests and General
Diagnostics/Diagnosis Procedure.
WITH GST
1. Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below the proper range, skip the following steps and go to See: Engine, Cooling and
Exhaust/Cooling System/Testing and Inspection/Component Tests and General Diagnostics/Diagnosis Procedure.
2. Confirm whether customer filled the coolant or not. If customer filled the coolant, skip the following steps and go to See: Engine, Cooling and
Exhaust/Cooling System/Testing and Inspection/Component Tests and General Diagnostics/Diagnosis Procedure.
3. Disconnect engine coolant temperature sensor harness connector.
4. Connect 150Ohm(s) resistor to engine coolant temperature sensor harness connector.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 351
5. Start engine and make sure that cooling fan operates.
CAUTION:
Be careful not to overheat engine.
6. If NG, go to See: Engine, Cooling and Exhaust/Cooling System/Testing and Inspection/Component Tests and General Diagnostics/Diagnosis
Procedure.
Diagnosis Procedure
1.CHECK COOLING FAN (CRANKSHAFT DRIVEN) OPERATION
1. Start engine and let it idle.
2. Make sure that cooling fan (crankshaft driven) operates normally.
OK or NG
OK (With CONSULT-III)-GO TO 2.
OK (Without CONSULT-III)-GO TO 3.
NG - Check cooling fan (crankshaft driven). See: Engine, Cooling and Exhaust/Cooling System/Radiator Cooling Fan/Service and
Repair/Removal and Installation.
2.CHECK COOLING FAN MOTOR OPERATION
With CONSULT-III
1. Start engine and let it idle.
2. Select "COOLING FAN" in "ACTIVE TEST" mode with CONSULT-III.
3. Make sure that cooling fan operates.
OK or NG
OK - GO TO 4.
NG - Check cooling fan control circuit. (Go to "PROCEDURE A".)
3.CHECK COOLING FAN MOTOR OPERATION
Without CONSULT-III
1. Disconnect engine coolant temperature sensor harness connector.
2. Connect 150Ohm(s) resistor to engine coolant temperature sensor harness connector.
3. Start engine and let it idle.
4. Make sure that cooling fan operates.
OK or NG
OK - GO TO 4.
NG - Check cooling fan control circuit. (Go to "PROCEDURE
A".)
4.CHECK COOLING SYSTEM FOR LEAK
See: Engine, Cooling and Exhaust/Cooling System/Coolant/Service and Repair/Inspection.
OK or NG
OK - GO TO 5.
NG - Check the following for leak.
- Hose
- Radiator
- Radiator cap
- Water pump
- Reservoir tank
5.CHECK COMPONENT PARTS
Check the following.
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- RESERVOIR TANK CAP ( See: Engine, Cooling and Exhaust/Cooling System/Radiator/Testing and Inspection.)
- Thermostat. ( See: Engine, Cooling and Exhaust/Cooling System/Coolant Outlet/Service and Repair/Removal and Installation.)
- Water control valve. ( See: Engine, Cooling and Exhaust/Cooling System/Coolant Outlet/Service and Repair/Removal and Installation.)
- Engine coolant temperature sensor. ( See: P0117.)
OK or NG
OK - GO TO 6.
NG - Replace malfunctioning component.
6.CHECK MAIN 13 CAUSES
If the cause cannot be isolated, go to See: P1217.
- INSPECTION END
Main 13 Causes of Overheating
P1220
P1220 FUEL PUMP CONTROL MODULE (FPCM)
Description
SYSTEM DESCRIPTION
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This system controls the fuel pump operation. The amount of fuel flow delivered from the fuel pump is altered between two flow rates by the
FPCM operation. The FPCM determines the voltage supplied to the fuel pump
(and therefore fuel flow) according to the following conditions.
COMPONENT DESCRIPTION
The FPCM adjusts the voltage supplied to the fuel pump to control the amount of fuel flow. When the FPCM increases the voltage supplied to the
fuel pump, the fuel flow is increased. When the FPCM decreases the voltage, the fuel flow is decreased.
On Board Diagnosis Logic
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V with ignition switch ON.
WITH CONSULT-III
1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-III.
2. Make sure that "COOLAN TEMP/S" indicates less than 70癈 (158癋). If not, cool down the engine.
3. Start engine.
4. Hold vehicle at the following conditions for 12 seconds.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to See: P1220.
WITH GST
Follow the procedure "WITH CONSULT-III" above.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 354
2. Loosen and retighten three ground screws on the body. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK FPCM POWER SUPPLY CIRCUIT
1. Disconnect fuel pump control module (FPCM) harness connector.
2. Turn ignition switch ON.
3. Check voltage between FPCM terminal 4 and ground with CONSULT-III or tester.
Voltage: Battery voltage
OK or NG
OK - GO TO 3.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK FPCM GROUND CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
2. Check harness continuity between FPCM terminal 1 and ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK - GO TO 4.
NG - Repair open circuit or short to power in harness or connectors.
4.CHECK FPCM GROUND CIRCUIT FOR OPEN AND SHORT-II
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 355
1. Disconnect "fuel level sensor unit and fuel pump" harness connector.
2. Disconnect dropping resistor harness connector.
3. Check harness continuity between the following;
"fuel level sensor unit and fuel pump" terminal 3 and dropping resistor terminal 2, FPCM terminal 2 and dropping resister terminal 2. Refer to
Wiring Diagram.
Continuity should exist.
4. Check harness continuity between the following;
FPCM terminal 2 and ground, "fuel level sensor and fuel pump" terminal 3 and ground. Refer to Wiring Diagram.
Continuity should not exist.
5. Also check harness for short to power.
OK or NG
OK - GO TO 6.
NG - GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors C1, E41
- Harness for open or short between "fuel level sensor unit and fuel pump" and dropping resistor
- Harness for open or short between FPCM and dropping resistor
- Harness for short between "fuel level sensor unit and fuel pump" and ground
- Harness for short between FPCM and ground
- Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK FPCM INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 38 and FPCM terminal 2. Refer to Wiring Diagram.
Continuity should exist.
3. Check harness continuity between ECM terminal 38 and ground. Refer to Wiring Diagram.
Continuity should not exist.
4. Also check harness for short to power.
OK or NG
OK - GO TO 8.
NG - GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F32, E2
- Harness for open or short between ECM and FPCM
- Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK FPCM OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 39 and FPCM terminal 3. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 10.
NG - GO TO 9.
9.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F32, E2
- Harness for open or short between ECM and FPCM
- Repair open circuit or short to ground or short to power in harness or connectors.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 356
10.CHECK FPCM
See: P1220.
OK or NG
OK - GO TO 11.
NG - Replace FPCM.
11.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
FUEL PUMP CONTROL MODULE (FPCM)
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Check voltage between FPCM terminal 2 and ground under the following conditions.
4. If NG, replace fuel pump control module.
P1225
P1225 TP SENSOR
Component Description
Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc. The throttle position sensor responds to the throttle
valve movement.
The throttle position sensor has the two sensors. These sensors are a kind of potentiometers which transform the throttle valve position into output
voltage, and emit the voltage signal to the ECM. In addition, these sensors detect the opening and closing speed of the throttle valve and feed the
voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 357
control motor to make the throttle valve opening angle properly in response to driving condition.
On Board Diagnosis Logic
The MIL will not light up for this self-diagnosis.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.
1. Turn ignition switch ON.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to See: P1225.
Diagnosis Procedure
1.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct.
3. Check if foreign matter is caught between the throttle valve and the housing.
OK or NG
OK - GO TO 2.
NG - Remove the foreign matter and clean the electric throttle control actuator inside.
2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
3. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
P1226
P1226 TP SENSOR
Component Description
Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc. The throttle position sensor responds to the throttle
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 358
valve movement.
The throttle position sensor has the two sensors. These sensors are a kind of potentiometers which transform the throttle valve position into output
voltage, and emit the voltage signal to the ECM. In addition, these sensors detect the opening and closing speed of the throttle valve and feed the
voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle
control motor to make the throttle valve opening angle properly in response to driving condition.
On Board Diagnosis Logic
The MIL will not light up for this self-diagnosis.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.
1. Turn ignition switch ON.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Repeat steps 2 and 3 for 32 times.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to See: P1226.
Diagnosis Procedure
1.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct.
3. Check if foreign matter is caught between the throttle valve and the housing.
OK or NG
OK - GO TO 2.
NG - Remove the foreign matter and clean the electric throttle control actuator inside.
2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
3. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
P1421
P1421 COLD START CONTROL
Description
ECM controls ignition timing and engine idle speed when engine is started with prewarming up condition.
This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions.
On Board Diagnosis Logic
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 359
DTC Confirmation Procedure
NOTE:
- If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
- If DTC P1421 is displayed with other DTC, first perform the trouble diagnosis for other DTC.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
WITH CONSULT-III
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Select "DATA MONITOR" mode with CONSULT-III.
4. Check that the "COOLAN TEMP/S" indication is between 5癈 (41癋) and 36癈 (97癋).
If "COOLAN TEMP/S" indication is within the specified value, go to the following step.
If "COOLANT TEMP/S" indication is out of the specified value, cool engine down or warm engine up and go to step 1.
5. Start engine and let it idle for 5 minutes.
6. Check 1st trip DTC.
7. If 1st trip DTC is detected, go to See: P1421.
WITH GST
Follow the procedure "WITH CONSULT-III" above.
Diagnosis Procedure
1.PERFORM IDLE AIR VOLUME LEARNING
Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
Is Idle Air Volume Learning carried out successfully?
Yes or No
Yes - GO TO 2.
No - Follow the instruction of Idle Air Volume Learning.
2.CHECK INTAKE SYSTEM
Check for the cause of intake air volume lacking. Refer to the following.
- Crushed intake air passage
- Intake air passage clogging
OK or NG
OK - GO TO 3.
NG - Repair or replace malfunctioning part
3.CHECK FUEL INJECTION SYSTEM FUNCTION
Perform See: P0171 in DTC P0171, P0174 FUEL INJECTION SYSTEM FUNCTION.
OK or NG
OK - GO TO 4.
NG - Go to See: P0171.
4.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON.
2. Select "SELF DIAG RESULTS" mode with CONSULT-III.
3. Touch "ERASE".
4. Perform DTC Confirmation Procedure.
See See: P1421.
5. Is the 1st trip DTC P1421 displayed again?
With GST
1. Turn ignition switch ON.
2. Select Service $04 with GST.
3. Perform DTC Confirmation Procedure.
See See: P1421.
4. Is the 1st trip DTC P1421 displayed again?
Yes or No
Yes - GO TO 5.
No - INSPECTION END
5.REPLACE ECM
1. Replace ECM.
2. Perform initialization of NVIS(NATS) system and registration of all NVIS(NATS) ignition key IDs. See: Accessories and Optional
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 360
Equipment/Antitheft and Alarm Systems/Testing and Inspection/Programming and Relearning/ECM Re-Communicating Function/Special
Repair Requirement/With Intelligent Key System (With intelligent key system) or See: Accessories and Optional Equipment/Antitheft and
Alarm Systems/Testing and Inspection/Programming and Relearning/ECM Re-Communicating Function/Special Repair Requirement/Without
Intelligent Key System (Without intelligent key system).
3. Perform See: Powertrain Management/Computers and Control Systems/Engine Control Module/Testing and Inspection.
4. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
5. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
6. [Flexible Fuel Vehicle]
Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle).
7. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
P1550
P1550 BATTERY CURRENT SENSOR
Component Description
The power generation voltage variable control enables fuel consumption to be decreased by reducing the engine load which is caused by the
power generation of the generator. The battery current sensor (1) is installed to the battery cable at the negative terminal. The sensor measures the
charging/discharging current of the battery. Based on the sensor signal, ECM judges whether or not the power generation voltage variable control
is performed. When performing the power generation voltage variable control, ECM calculates the target power generation voltage based on the
sensor signal. And ECM sends the calculated value as the power generation command value to IPDM E/R. For the details of the power generation
voltage variable control, refer to See: Starting and Charging/Charging System/Description and Operation/Power Generation Voltage Variable
Control System.
Arrow indicates : Vehicle front
CAUTION:
Do not connect the electrical component or the ground wire directly to the battery terminal. The connection causes the malfunction of the
power generation voltage variable control, and then the battery discharge may occur.
On Board Diagnosis Logic
The MIL will not light up for this self-diagnosis.
NOTE:
If DTC P1550 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. See: P0643.
DTC Confirmation Procedure
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
1. Start engine and wait at least 10 seconds.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to See: P1550.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 361
2. Loosen and retighten ground screws on the body.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Power Supply
And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT
1. Disconnect battery current sensor (1) harness connector.
2. Turn ignition switch ON.
Arrow indicates : Vehicle front
3. Check voltage between battery current sensor terminal 1 and ground with CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E5, F14
- Harness for open or short between battery current sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between battery current sensor terminal 2 and ECM terminal 67. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 6.
NG - GO TO 5.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 362
5.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E5, F14
- Harness for open or short between battery current sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between battery current sensor terminal 3 and ECM terminal 71. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 8.
NG - GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- Harness for open or short between battery current sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK BATTERY CURRENT SENSOR
See: P1550.
OK or NG
OK - GO TO 9.
NG - Replace battery negative cable assembly.
9.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
BATTERY CURRENT SENSOR
1. Reconnect harness connectors disconnected.
2. Disconnect battery negative cable (1).
3. Install jumper cable (A) between battery negative terminal and body ground.
4. Turn ignition switch ON.
5. Check voltage between ECM terminal 71 (battery current sensor signal) and ground.
Voltage: Approximately 2.5 V
6. If NG, replace battery negative cable assembly.
P1551
P1551, P1552 BATTERY CURRENT SENSOR
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 363
Component Description
The power generation voltage variable control enables fuel consumption to be decreased by reducing the engine load which is caused by the
power generation of the generator. The battery current sensor (1) is installed to the battery cable at the negative terminal. The sensor measures the
charging/discharging current of the battery. Based on the sensor signal, ECM judges whether or not the power generation voltage variable control
is performed. When performing the power generation voltage variable control, ECM calculates the target power generation voltage based on the
sensor signal. And ECM sends the calculated value as the power generation command value to IPDM E/R. For the details of the power generation
voltage variable control, refer to See: Starting and Charging/Charging System/Description and Operation/Power Generation Voltage Variable
Control System.
Arrow indicates : Vehicle front
CAUTION:
Do not connect the electrical component or the ground wire directly to the battery terminal. The connection causes the malfunction of the
power generation voltage variable control, and then the battery discharge may occur.
On Board Diagnosis Logic
The MIL will not light up for these self-diagnoses.
NOTE:
If DTC P1551 or P1552 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. See: P0643.
DTC Confirmation Procedure
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V with ignition switch ON
1. Turn ignition switch ON.
2. Wait at least 10 seconds.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to See: P1551.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Power Supply
And Ground Circuit/Ground Inspection.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 364
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT
Arrow indicates : Vehicle front
1. Disconnect battery current sensor (1) harness connector.
2. Turn ignition switch ON.
3. Check voltage between battery current sensor terminal 1 and ground with CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E5, F14
- Harness for open or short between battery current sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between battery current sensor terminal 2 and ECM terminal 67. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 6.
NG - GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E5, F14
- Harness for open or short between battery current sensor and ECM
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 365
- Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between battery current sensor terminal 3 and ECM terminal 71. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 8.
NG - GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- Harness for open or short between battery current sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK BATTERY CURRENT SENSOR
See: P1551.
OK or NG
OK - GO TO 9.
NG - Replace battery negative cable assembly.
9.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
BATTERY CURRENT SENSOR
1. Reconnect harness connectors disconnected.
2. Disconnect battery negative cable (1).
3. Install jumper cable (A) between battery negative terminal and body ground.
4. Turn ignition switch ON.
5. Check voltage between ECM terminal 71 (battery current sensor signal) and ground.
Voltage: Approximately 2.5 V
6. If NG, replace battery negative cable assembly.
P1552
P1551, P1552 BATTERY CURRENT SENSOR
Component Description
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 366
The power generation voltage variable control enables fuel consumption to be decreased by reducing the engine load which is caused by the
power generation of the generator. The battery current sensor (1) is installed to the battery cable at the negative terminal. The sensor measures the
charging/discharging current of the battery. Based on the sensor signal, ECM judges whether or not the power generation voltage variable control
is performed. When performing the power generation voltage variable control, ECM calculates the target power generation voltage based on the
sensor signal. And ECM sends the calculated value as the power generation command value to IPDM E/R. For the details of the power generation
voltage variable control, refer to See: Starting and Charging/Charging System/Description and Operation/Power Generation Voltage Variable
Control System.
Arrow indicates : Vehicle front
CAUTION:
Do not connect the electrical component or the ground wire directly to the battery terminal. The connection causes the malfunction of the
power generation voltage variable control, and then the battery discharge may occur.
On Board Diagnosis Logic
The MIL will not light up for these self-diagnoses.
NOTE:
If DTC P1551 or P1552 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. See: P0643 See: P0643 See:
P0643.
DTC Confirmation Procedure
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V with ignition switch ON
1. Turn ignition switch ON.
2. Wait at least 10 seconds.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to See: P1551.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Power Supply
And Ground Circuit/Ground Inspection.
OK or NG
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 367
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT
1. Disconnect battery current sensor (1) harness connector.
2. Turn ignition switch ON.
Arrow indicates : Vehicle front
3. Check voltage between battery current sensor terminal 1 and ground with CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E5, F14
- Harness for open or short between battery current sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between battery current sensor terminal 2 and ECM terminal 67. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 6.
NG - GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E5, F14
- Harness for open or short between battery current sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between battery current sensor terminal 3 and ECM terminal 71. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 8.
NG - GO TO 7.
7.DETECT MALFUNCTIONING PART
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 368
Check the following.
- Harness connectors E2, F32
- Harness for open or short between battery current sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK BATTERY CURRENT SENSOR
See: P1551.
OK or NG
OK - GO TO 9.
NG - Replace battery negative cable assembly.
9.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
BATTERY CURRENT SENSOR
1. Reconnect harness connectors disconnected.
2. Disconnect battery negative cable (1).
3. Install jumper cable (A) between battery negative terminal and body ground.
4. Turn ignition switch ON.
5. Check voltage between ECM terminal 71 (battery current sensor signal) and ground.
Voltage: Approximately 2.5 V
6. If NG, replace battery negative cable assembly.
P1553
P1553 BATTERY CURRENT SENSOR
Component Description
The power generation voltage variable control enables fuel consumption to be decreased by reducing the engine load which is caused by the
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 369
power generation of the generator. The battery current sensor (1) is installed to the battery cable at the negative terminal. The sensor measures the
charging/discharging current of the battery. Based on the sensor signal, ECM judges whether or not the power generation voltage variable control
is performed. When performing the power generation voltage variable control, ECM calculates the target power generation voltage based on the
sensor signal. And ECM sends the calculated value as the power generation command value to IPDM E/R. For the details of the power generation
voltage variable control, refer to See: Starting and Charging/Charging System/Description and Operation/Power Generation Voltage Variable
Control System.
Arrow indicates : Vehicle front
CAUTION:
Do not connect the electrical component or the ground wire directly to the battery terminal. The connection causes the malfunction of the
power generation voltage variable control, and then the battery discharge may occur.
On Board Diagnosis Logic
The MIL will not light up for this self-diagnosis.
NOTE:
If DTC P1553 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. See: P0643.
DTC Confirmation Procedure
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
1. Start engine and wait at least 10 seconds.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to See: P1553.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Power Supply
And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT
1. Disconnect battery current sensor (1) harness connector.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 370
2. Turn ignition switch ON.
Arrow indicates : Vehicle front
3. Check voltage between battery current sensor terminal 1 and ground with CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E5, F14
- Harness for open or short between battery current sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between battery current sensor terminal 2 and ECM terminal 67. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 6.
NG - GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E5, F14
- Harness for open or short between battery current sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between battery current sensor terminal 3 and ECM terminal 71. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 8.
NG - GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- Harness for open or short between battery current sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK BATTERY CURRENT SENSOR
See: P1553.
OK or NG
OK - GO TO 9.
NG - Replace battery negative cable assembly.
9.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
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BATTERY CURRENT SENSOR
1. Reconnect harness connectors disconnected.
2. Disconnect battery negative cable (1).
3. Install jumper cable (A) between battery negative terminal and body ground.
4. Turn ignition switch ON.
5. Check voltage between ECM terminal 71 (battery current sensor signal) and ground.
Voltage: Approximately 2.5 V
6. If NG, replace battery negative cable assembly.
P1554
P1554 BATTERY CURRENT SENSOR
Component Description
The power generation voltage variable control enables fuel consumption to be decreased by reducing the engine load which is caused by the
power generation of the generator. The battery current sensor (1) is installed to the battery cable at the negative terminal. The sensor measures the
charging/discharging current of the battery. Based on the sensor signal, ECM judges whether or not the power generation voltage variable control
is performed. When performing the power generation voltage variable control, ECM calculates the target power generation voltage based on the
sensor signal. And ECM sends the calculated value as the power generation command value to IPDM E/R. For the details of the power generation
voltage variable control, refer to See: Starting and Charging/Charging System/Description and Operation/Power Generation Voltage Variable
Control System.
Arrow indicates : Vehicle front
CAUTION:
Do not connect the electrical component or the ground wire directly to the battery terminal. The connection causes the malfunction of the
power generation voltage variable control, and then the battery discharge may occur.
On Board Diagnosis Logic
The MIL will not light up for this self-diagnosis.
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NOTE:
If DTC P1554 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. See: P0643.
Overall Function Check
Use this procedure to check the overall function of the battery current sensor circuit. During this check, a 1st trip DTC might not be confirmed.
TESTING CONDITION:
- Before performing the following procedure, confirm that battery voltage is more than 12.8 V at idle.
- Before performing the following procedure, confirm that all load switches and A/C switch are turned
OFF.
WITH CONSULT-III
1. Start engine and let it idle.
2. Select "BAT CUR SEN" in "DATA MONITOR" mode with CONSULT-III.
3. Check "BAT CUR SEN" indication for 10 seconds.
"BAT CUR SEN" should be above 2,300 mV at least once.
4. If NG, go to See: P1554.
WITH GST
1. Start engine and let it idle.
2. Check voltage between ECM terminal 71 (battery current sensor signal) and ground for 10 seconds.
The voltage should be above 2.3 V at least once.
3. If NG, go to See: P1554.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT
Arrow indicates : Vehicle front
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 373
1. Disconnect battery current sensor (1) harness connector.
2. Turn ignition switch ON.
3. Check voltage between battery current sensor terminal 1 and ground with CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E5, F14
- Harness for open or short between battery current sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between battery current sensor terminal 2 and ECM terminal 67. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 6.
NG - GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E5, F14
- Harness for open or short between battery current sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between battery current sensor terminal 3 and ECM terminal 71. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 8.
NG - GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- Harness for open or short between battery current sensor and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK BATTERY CURRENT SENSOR
See: P1140.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 374
OK or NG
OK - GO TO 9.
NG - Replace battery negative cable assembly.
9.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
BATTERY CURRENT SENSOR
1. Reconnect harness connectors disconnected.
2. Disconnect battery negative cable (1).
3. Install jumper cable (A) between battery negative terminal and body ground.
4. Turn ignition switch ON.
5. Check voltage between ECM terminal 71 (battery current sensor signal) and ground.
Voltage: Approximately 2.5 V
6. If NG, replace battery negative cable assembly.
P1564
P1564 ASCD STEERING SWITCH
Component Description
ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation of switch, and determines which
button is operated.
See: Powertrain Management/Computers and Control Systems/Description and Operation/Automatic Speed Control Device (ASCD)/System
Description for the ASCD function.
On Board Diagnosis Logic
- This self-diagnosis has the one trip detection logic.
- The MIL will not light up for this self-diagnosis.
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NOTE:
If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. See: P0605.
DTC Confirmation Procedure
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Wait at least 10 seconds.
4. Press MAIN switch for at least 10 seconds, then release it and wait at least 10 seconds.
5. Press CANCEL switch for at least 10 seconds, then release it and wait at least 10 seconds.
6. Press RESUME/ACCELERATE switch for at least 10 seconds, then release it and wait at least 10 seconds.
7. Press SET/COAST switch for at least 10 seconds, then release it and wait at least 10 seconds.
8. Check DTC.
9. If DTC is detected, go to See: P1564.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Power Supply
And Ground Circuit/Ground Inspection.
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK ASCD STEERING SWITCH CIRCUIT
With CONSULT-III
1. Turn ignition switch ON.
2. Select "MAIN SW", "CANCEL SW", RESUME/ACC SW" and "SET SW" in "DATA MONITOR" mode with
CONSULT-III.
3. Check each item indication under the following conditions.
Without CONSULT-III
1. Turn ignition switch ON.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 376
2. Check voltage between ECM terminal 99 and ground with pressing each button.
OK or NG
OK - GO TO 8.
NG - GO TO 3.
3.CHECK ASCD STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect combination switch harness connector M102.
3. Disconnect ECM harness connector.
4. Check harness continuity between combination switch terminal
15 and ECM terminal 67. Refer to Wiring Diagram.
Continuity should exist.
5. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 5.
NG - GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M31, E152
- Harness connectors E5, F14
- Combination switch (spiral cable)
- Harness for open and short between ECM and combination switch
- Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 99 and combination switch terminal 14. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 377
OK - GO TO 7.
NG - GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M31, E152
- Combination switch (spiral cable)
- Harness for open and short between ECM and combination switch
- Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK ASCD STEERING SWITCH
See: P1564.
OK or NG
OK - GO TO 8.
NG - Replace ASCD steering switch.
8.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
ASCD STEERING SWITCH
1. Disconnect combination switch (spiral cable) harness connector M102.
2. Check continuity between combination switch (spiral cable) terminals 14 and 15 with pushing each switch.
P1572
P1572 ASCD BRAKE SWITCH
Component Description
When the brake pedal is depressed, ASCD brake switch is turned
OFF and stop lamp switch is turned ON. ECM detects the state of the brake pedal by this input of two kinds (ON/OFF signal). See: Powertrain
Management/Computers and Control Systems/Description and Operation/Automatic Speed Control Device (ASCD)/System Description for the
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 378
ASCD function.
On Board Diagnosis Logic
- This self-diagnosis has the one trip detection logic.
- The MIL will not light up for this self-diagnosis.
NOTE:
- If DTC P 1572 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. See: P0605.
- This self-diagnosis has the one trip detection logic. When malfunction A is detected, DTC is not stored in ECM memory. And in that
case, 1st trip DTC and 1st trip freeze frame data are displayed.
1st trip DTC is erased when ignition switch OFF. And even when malfunction A is detected in two consecutive trips, DTC is not stored in
ECM memory.
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
- Procedure for malfunction B is not described here. It takes extremely long time to complete procedure for malfunction B. By performing
procedure for malfunction A, the incident that causes malfunction B can be detected.
- If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Steps 4 and 7 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test is expected to be easier, it
is unnecessary to lift the vehicle.
WITH CONSULT-III
1. Start engine (VDC switch OFF).
2. Select "DATA MONITOR" mode with CONSULT-III.
3. Press MAIN switch and make sure that CRUISE indicator lights up.
4. Drive the vehicle for at least 5 consecutive seconds under the following condition.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to See: P1572.
If 1st trip DTC is not detected, go to the following step.
7. Drive the vehicle for at least 5 consecutive seconds under the following condition.
8. Check 1st trip DTC.
9. If 1st trip DTC is detected, go to See: P1572.
WITH GST
Follow the procedure "WITH CONSULT-III" above.
Diagnosis Procedure
1.CHECK OVERALL FUNCTION-I
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 379
With CONSULT-III
1. Turn ignition switch ON.
2. Select "BRAKE SW1" in "DATA MONITOR" mode with CONSULT-III.
3. Check "BRAKE SW1" indication under the following conditions.
Without CONSULT-III
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 108 and ground under the following conditions.
OK or NG
OK - GO TO 2.
NG - GO TO 3.
2.CHECK OVERALL FUNCTION-II
With CONSULT-III
Check "BRAKE SW2" indication in "DATA MONITOR" mode.
Without CONSULT-III
Check voltage between ECM terminal 101 and ground under the following conditions.
OK or NG
OK - GO TO 11.
NG - GO TO 7.
3.CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 380
2. Disconnect ASCD brake switch harness connector.
3. Turn ignition switch ON.
4. Check voltage between ASCD brake switch terminal 1 and ground with CONSULT-III or tester.
Voltage: Battery voltage
OK or NG
OK - GO TO 5.
NG - GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M31, E152
- Fuse block (J/B) connector M4
- 10 A fuse (No. 15)
- Harness for open or short between ASCD brake switch and fuse
- Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 108 and ASCD brake switch terminal 2. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 6.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK ASCD BRAKE SWITCH
See: P1572.
OK or NG
OK - GO TO 11.
NG - Replace ASCD brake switch.
7.CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 381
2. Disconnect stop lamp switch harness connector.
3. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-III or tester.
Voltage: Battery voltage
OK or NG
OK - GO TO 9.
NG - GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M31, E152
- Fuse block (J/B) connector M60
- 10 A fuse (No. 20)
- Harness for open or short between stop lamp switch and battery
- Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 101 and stop lamp switch terminal 2. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 10.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
10.CHECK STOP LAMP SWITCH
See: P1572.
OK or NG
OK - GO TO 11.
NG - Replace stop lamp switch.
11.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
ASCD BRAKE SWITCH
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 382
3. Check harness continuity between ASCD brake switch terminals
1 and 2 under the following conditions.
If NG, adjust ASCD brake switch installation, See: Brakes and Traction Control/Brake Pedal Assy/Service and Repair/Inspection and Adjustment
, and perform step 3 again.
STOP LAMP SWITCH
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check harness continuity between stop lamp switch terminals 1 and 2 under the following conditions.
If NG, adjust stop lamp switch installation, See: Brakes and Traction Control/Brake Pedal Assy/Service and Repair/Inspection and Adjustment,
and perform step 3 again.
P1574
P1574 ASCD VEHICLE SPEED SENSOR
Component Description
The ECM receives two vehicle speed sensor signals via CAN communication line. One is sent from combination meter and the other is from TCM
(Transmission control module). The ECM uses these signals for ASCD control. See: Powertrain Management/Computers and Control
Systems/Description and Operation/Automatic Speed Control Device (ASCD)/System Description for ASCD functions.
On Board Diagnosis Logic
- This self-diagnosis has the one trip detection logic.
- The MIL will not light up for this self-diagnosis.
NOTE:
- If DTC P1574 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
- If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500. See: P0500.
- If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. See: P0605.
- If DTC P1574 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. See: P0607.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 383
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Step 3 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test is expected to be easier, it is
unnecessary to lift the vehicle.
1. Start engine (VDC switch OFF).
2. Drive the vehicle at more than 40 km/h (25 MPH).
3. Check DTC.
4. If DTC is detected, go to See: P1574.
Diagnosis Procedure
1.CHECK DTC WITH TCM
Check DTC with TCM. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Reading and Clearing Diagnostic
Trouble Codes/OBD-II Diagnostic Trouble Code (DTC).
OK or NG
OK - GO TO 2.
NG - Perform trouble shooting relevant to DTC indicated.
2.CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Scan Tool Testing and Procedures.
OK or NG
OK - GO TO 3.
NG - Repair or replace.
3.CHECK COMBINATION METER FUNCTION
Check combination meter function. See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Scan Tool Testing and
Procedures/CONSULT-III Function.
- INSPECTION END
With Intelligent Key System
P1610 LOCK MODE
Description
When the starting operation is carried more than five times consecutively under the following conditions, NATS will shift to the mode which
prevents the engine from being started.
- Unregistered mechanical key is used.
- BCM or ECM's malfunctioning.
DTC Logic
DTC DETECTION LOGIC
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 384
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check "Self diagnostic result" with CONSULT-III.
Is DTC detected?
YES - See: P1610/With Intelligent Key System.
NO - Inspection End.
Diagnosis Procedure
1.CHECK ENGINE START FUNCTION
1. Perform the check for DTC except DTC P1610.
2. Use CONSULT-III to erase DTC after fixing.
3. Check that engine can start with registered mechanical key.
Does the engine start?
YES - Inspection End.
NO - GO TO 2
2.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Intermittent Incident.
- Inspection End.
Without Intelligent Key System
P1610 LOCK MODE
Description
When the starting operation is carried more than five times consecutively under the following conditions, NATS will shift to the mode which
prevents the engine from being started.
- Unregistered mechanical key is used.
- BCM or ECM's malfunctioning.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check "Self diagnostic result" with CONSULT-III.
Is DTC detected?
YES - See: P1610/Without Intelligent Key System.
NO - Inspection End.
Diagnosis Procedure
1.CHECK ENGINE START FUNCTION
1. Perform the check for DTC except DTC P1610.
2. Use CONSULT-III to erase DTC after fixing.
3. Check that engine can start with registered mechanical key.
Does the engine start?
YES - Inspection End.
NO - GO TO 2
2.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Intermittent Incident.
- Inspection End.
With Intelligent Key System
P1611 ID DISCORD, IMMU-ECM
Description
BCM performs the ID verification with ECM that allows the engine to start. BCM starts the communication with
ECM if ignition switch is turned ON and starts the engine if the ID is OK. ECM prevents the engine from starting if the ID is not registered.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 385
DTC Logic
DTC DETECTION LOGIC
NOTE:
- If DTC P1611 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. See: U Code Charts/U1000/SEC/Without
Intelligent Key System.
- If DTC P1611 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. See: U Code Charts/U1010/SEC/Without
Intelligent Key System.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check "Self diagnostic result" with CONSULT-III.
Is DTC detected?
YES - See: P1611/With Intelligent Key System.
NO - Inspection End.
Diagnosis Procedure
1.PERFORM INITIALIZATION
Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to "CONSULT-III Operation Manual".
Can the system be initialized and can the engine be started with re-registered mechanical key?
YES - ID was unregistered.
NO - GO TO 2
2.REPLACE BCM
1. Replace BCM. See: Body and Frame/Body Control Systems/Body Control Module/Service and Repair.
2. Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to "CONSULT-III Operation Manual".
Can the system be initialized and can the engine be started with re-registered mechanical key?
YES - BCM is malfunctioning.
NO - GO TO 3
3.REPLACE ECM
1. Replace ECM. Refer to Removal and Installation.
2. Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to "CONSULT-III Operation Manual".
Can the system be initialized and can the engine be started with re-registered mechanical key?
YES - ECM is malfunctioning.
NO - GO TO 4
4.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Intermittent Incident.
- Inspection End.
Without Intelligent Key System
P1611 ID DISCORD, IMMU-ECM
Description
BCM performs the ID verification with ECM that allows the engine to start. BCM starts the communication with
ECM if ignition switch is turned ON and starts the engine if the ID is OK. ECM prevents the engine from starting if the ID is not registered.
DTC Logic
DTC DETECTION LOGIC
NOTE:
- If DTC P1611 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. See: U Code Charts/U1000/SEC/Without
Intelligent Key System.
- If DTC P1611 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. See: U Code Charts/U1010/SEC/Without
Intelligent Key System.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 386
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check "Self diagnostic result" with CONSULT-III.
Is DTC detected?
YES - See: P1611/Without Intelligent Key System.
NO - Inspection End.
Diagnosis Procedure
1.PERFORM INITIALIZATION
Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to "CONSULT-III Operation Manual".
Can the system be initialized and can the engine be started with re-registered mechanical key?
YES - ID was unregistered.
NO - GO TO 2
2.REPLACE BCM
1. Replace BCM. See: Body and Frame/Body Control Systems/Body Control Module/Service and Repair.
2. Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to "CONSULT-III Operation Manual".
Can the system be initialized and can the engine be started with re-registered mechanical key?
YES - BCM is malfunctioning.
NO - GO TO 3
3.REPLACE ECM
1. Replace ECM. Refer to Removal and Installation.
2. Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to "CONSULT-III Operation Manual".
Can the system be initialized and can the engine be started with re-registered mechanical key?
YES - ECM is malfunctioning.
NO - GO TO 4
4.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Intermittent Incident.
- Inspection End.
With Intelligent Key System
P1612 CHAIN OF ECM-IMMU
Description
BCM performs the ID verification with ECM that allows the engine to start. BCM starts the communication with
ECM if ignition switch is turned ON and starts the engine if the ID is OK. ECM prevents the engine from starting if the ID is not registered.
DTC Logic
DTC DETECTION LOGIC
NOTE:
- If DTC P1612 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. See: U Code Charts/U1000/SEC/Without
Intelligent Key System.
- If DTC P1612 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. See: U Code Charts/U1010/SEC/Without
Intelligent Key System.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check "Self diagnostic result" with CONSULT-III.
Is DTC detected?
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YES - See: P1612/With Intelligent Key System.
NO - Inspection End.
Diagnosis Procedure
1.REPLACE BCM
1. Replace BCM. See: Body and Frame/Body Control Systems/Body Control Module/Service and Repair.
2. Perform initialization with CONSULT-III.
For initialization, refer to "CONSULT-III Operation Manual".
Does the engine start?
YES - BCM was malfunctioning.
NO - ECM is malfunctioning.
- Replace ECM.
- Perform ECM re-communicating function.
Without Intelligent Key System
P1612 CHAIN OF ECM-IMMU
Description
BCM performs the ID verification with ECM that allows the engine to start. BCM starts the communication with
ECM if ignition switch is turned ON and starts the engine if the ID is OK. ECM prevents the engine from starting if the ID is not registered.
DTC Logic
DTC DETECTION LOGIC
NOTE:
- If DTC P1612 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. See: U Code Charts/U1000/SEC/Without
Intelligent Key System.
- If DTC P1612 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. See: U Code Charts/U1010/SEC/Without
Intelligent Key System.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check "Self diagnostic result" with CONSULT-III.
Is DTC detected?
YES - See: P1612/Without Intelligent Key System.
NO - Inspection End.
Diagnosis Procedure
1.REPLACE BCM
1. Replace BCM. See: Body and Frame/Body Control Systems/Body Control Module/Service and Repair.
2. Perform initialization with CONSULT-III.
For initialization, refer to "CONSULT-III Operation Manual".
Does the engine start?
YES - BCM was malfunctioning.
NO - ECM is malfunctioning.
- Replace ECM.
- Perform ECM re-communicating function.
With Intelligent Key System
P1614 CHAIN OF IMMU-KEY
Description
Performs ID verification through BCM and NATS antenna amplifier when ignition knob switch is pressed.
Prohibits the release of steering lock or start of engine when an unregistered ID of mechanical key is used.
DTC Logic
DTC DETECTION LOGIC
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 388
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Insert mechanical key into the key cylinder.
2. Press the ignition knob switch.
3. Check "Self diagnostic result" with CONSULT-III.
Is DTC detected?
YES - See: P1614/With Intelligent Key System.
NO - Inspection End.
Diagnosis Procedure
Regarding Wiring Diagram information, See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Diagrams/Electrical
Diagrams/BCM.
1.CHECK NATS ANTENNA AMP. INSTALLATION
Check NATS antenna amp. installation. See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Locations/NVIS (Nissan Vehicle
Immobilizer System-NATS)/With Intelligent Key System.
Is the inspection result normal?
YES - GO TO 2
NO - Reinstall NATS antenna amp. correctly.
2.CHECK NVIS (NATS) IGNITION KEY ID CHIP
Start engine with another registered NATS ignition key.
Does the engine start?
YES - Ignition key ID chip is malfunctioning.
- Replace the ignition key.
- Perform initialization with CONSULT-III.
For initialization, refer to "CONSULT-III Operation Manual".
NO - GO TO 3
3.CHECK POWER SUPPLY FOR NATS ANTENNA AMP.
1. Turn ignition switch ON.
2. Check voltage between NATS antenna amp. connector M21 terminal 1 and ground.
1 - Ground : Battery voltage
Is the inspection result normal?
YES - GO TO 4
NO - Repair or replace fuse or harness.
4.CHECK NATS ANTENNA AMP. GROUND LINE CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect NATS antenna amp. connector.
3. Check continuity between NATS antenna amp. connector M21 terminal 3 and ground.
3 - Ground : Continuity should exist.
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Is the inspection result normal?
YES - GO TO 5
NO - Repair or replace harness.
NOTE:
If harness is OK, replace BCM, See: Body and Frame/Body Control Systems/Body Control Module/Service and Repair. Perform initialization
with
CONSULT-III. For initialization, refer to "CONSULT-III
Operation Manual".
5.CHECK NATS ANTENNA AMP. SIGNAL LINE- 1
1. Connect NATS antenna amp. connector.
2. Turn ignition switch ON.
3. Check voltage between NATS antenna amp. connector M21 terminal 2 and ground with analog tester.
Is the inspection result normal?
YES - GO TO 6
NO - Repair or replace harness.
NOTE:
If harness is OK, replace BCM, See: Body and Frame/Body Control Systems/Body Control Module/Service and Repair. Perform initialization
with CONSULT-III. For initialization, refer to "CONSULT-III Operation Manual".
6.CHECK NATS ANTENNA AMP. SIGNAL LINE- 2
Check voltage between NATS antenna amp. connector M21 terminal
4 and ground with analog tester.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 390
Is the inspection result normal?
YES - NATS antenna amp. is malfunctioning.
NO - Repair or replace harness.
NOTE:
If harness is OK, replace BCM, See: Body and Frame/Body Control Systems/Body Control Module/Service and Repair. Perform initialization
with CONSULT-III. For initialization, refer to "CONSULT-III Operation Manual".
Without Intelligent Key System
P1614 CHAIN OF IMMU-KEY
Description
Performs ID verification through BCM and NATS antenna amplifier when ignition key is inserted and ignition switch turned ON.
Prohibits the start of engine when an unregistered ID of ignition key is used.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Insert ignition key into the key cylinder.
2. Turn ignition switch ON.
3. Check "Self diagnostic result" with CONSULT-III.
Is DTC detected?
YES - See: P1614/Without Intelligent Key System.
NO - Inspection End.
Diagnosis Procedure
Regarding Wiring Diagram information, See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Diagrams/Electrical
Diagrams/BCM/Without Intelligent Key System.
1.CHECK NATS ANTENNA AMP. INSTALLATION
Check NATS antenna amp. installation. See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Service and Repair.
Is the inspection result normal?
YES - GO TO 2
NO - Reinstall NATS antenna amp. correctly.
2.CHECK NVIS (NATS) IGNITION KEY ID CHIP
Start engine with another registered NATS ignition key.
Does the engine start?
YES - Ignition key ID chip is malfunctioning.
- Replace the ignition key.
- Perform initialization with CONSULT-III.
For initialization, refer to "CONSULT-III Operation Manual".
NO - GO TO 3
3.CHECK POWER SUPPLY FOR NATS ANTENNA AMP.
1. Turn ignition switch ON.
2. Check voltage between NATS antenna amp. connector M21 terminal 1 and ground.
1 - Ground : Battery voltage
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Is the inspection result normal?
YES - GO TO 4
NO - Repair or replace fuse or harness.
4.CHECK NATS ANTENNA AMP. GROUND LINE CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect NATS antenna amp. connector.
3. Check continuity between NATS antenna amp. connector M21 terminal 3 and ground.
3 - Ground : Continuity should exist.
Is the inspection result normal?
YES - GO TO 5
NO - Repair or replace harness.
NOTE:
If harness is OK, replace BCM, See: Body and Frame/Body Control Systems/Body Control Module/Service and Repair. Perform initialization
with
CONSULT-III. For initialization, refer to "CONSULT-III
Operation Manual".
5.CHECK NATS ANTENNA AMP. SIGNAL LINE- 1
1. Connect NATS antenna amp. connector.
2. Turn ignition switch ON.
3. Check voltage between NATS antenna amp. connector M21 terminal 2 and ground with analog tester.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 392
Is the inspection result normal?
YES - GO TO 6
NO - Repair or replace harness.
NOTE:
If harness is OK, replace BCM, See: Body and Frame/Body Control Systems/Body Control Module/Service and Repair. Perform initialization
with CONSULT-III. For initialization, refer to "CONSULT-III Operation Manual".
6.CHECK NATS ANTENNA AMP. SIGNAL LINE- 2
Check voltage between NATS antenna amp. connector M21 terminal
4 and ground with analog tester.
Is the inspection result normal?
YES - NATS antenna amp. is malfunctioning.
NO - Repair or replace harness.
NOTE:
If harness is OK, replace BCM, See: Body and Frame/Body Control Systems/Body Control Module/Service and Repair. Perform initialization
with CONSULT-III. For initialization, refer to "CONSULT-III Operation Manual".
With Intelligent Key System
P1615 DIFFERENCE OF KEY
Description
Performs ID verification through BCM when ignition knob switch is pressed.
Prohibits the release of steering lock or start of engine when an unregistered ID of mechanical key is used.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Insert mechanical key into the key cylinder.
2. Press the ignition knob switch.
3. Check "Self diagnostic result" with CONSULT-III.
Is DTC detected?
YES - See: P1615/With Intelligent Key System.
NO - Inspection End.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 393
Diagnosis Procedure
1.PERFORM INITIALIZATION
Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to "CONSULT-III Operation Manual".
Can the system be initialized and can the engine be started with re-registered mechanical key?
YES - Mechanical key was unregistered.
NO - BCM is malfunctioning.
- Replace BCM. See: Body and Frame/Body Control Systems/Body Control Module/Service and Repair.
- Perform initialization again
Without Intelligent Key System
P1615 DIFFERENCE OF KEY
Description
Performs ID verification through BCM when ignition knob switch is pressed.
Prohibits the release of steering lock or start of engine when an unregistered ID of mechanical key is used.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Insert mechanical key into the key cylinder.
2. Check "Self diagnostic result" with CONSULT-III.
Is DTC detected?
YES - See: P1615/Without Intelligent Key System.
NO - Inspection End.
Diagnosis Procedure
1.PERFORM INITIALIZATION
Perform initialization with CONSULT-III. Re-register all mechanical keys.
For initialization and registration of mechanical key. Refer to "CONSULT-III Operation Manual".
Can the system be initialized and can the engine be started with re-registered mechanical key?
YES - Mechanical key was unregistered.
NO - BCM is malfunctioning.
- Replace BCM. See: Body and Frame/Body Control Systems/Body Control Module/Service and Repair.
- Perform initialization again
P1705
P1705 TP SENSOR
Description
Electric throttle control actuator consists of throttle control motor, accelerator pedal position sensor, throttle position sensor, etc. The actuator
sends a signal to the ECM, and ECM sends signals to TCM with CAN communication.
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is not an OBD-II self-diagnostic item.
- Diagnostic trouble code "P1705" with CONSULT-III is detected when TCM does not receive the proper accelerator pedal position signals
(input by CAN communication) from ECM.
Possible Cause
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 394
Harness or connectors
(The sensor circuit is open or shorted.)
DTC Confirmation Procedure
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start engine and let it idle for 1 second.
4. If DTC is detected, go to See: P1705.
Diagnosis Procedure
1.CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures/CONSULT-III Function (Transmission).
Is a malfunction in the CAN communication indicated in the results?
YES - Check CAN communication line. See: U Code Charts/U1000/TM See: U Code Charts/U1000/TM See: U Code Charts/U1000/TM See: U
Code Charts/U1000/TM See: U Code Charts/U1000/TM.
NO - GO TO 2.
2.CHECK DTC WITH TCM
With CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Depress accelerator pedal and read out the value of "ACCELE POSI".
4. Select "SELF-DIAG RESULTS" mode for "TRANSMISSION" with CONSULT-III. See: Powertrain Management/Transmission Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/CONSULT-III Function (Transmission).
OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.CHECK DTC WITH ECM
With CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "SELF-DIAG RESULTS" mode for "ENGINE" with CONSULT-III. See: Powertrain Management/Transmission Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/CONSULT-III Function (Transmission).
OK or NG
OK - GO TO 4.
NG - Check the DTC detected item. See: .
- If CAN communication line is detected, go to See: U Code Charts/U1000/TM.
4.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P1705.
OK or NG
OK - INSPECTION END
NG - GO TO 5.
5.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 6.
NG - Repair or replace damaged parts.
6.DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
P1710
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 395
P1710 TRANSMISSION FLUID TEMPERATURE SENSOR
Description
The A/T fluid temperature sensor 1 detects the A/T fluid temperature and sends a signal to the TCM.
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P1710 (A/T), P0710 (ENGINE)" with CONSULT-III is detected when TCM receives an excessively low or high
voltage from the sensor.
Possible Cause
- Harness or connectors
(The sensor circuit is open or shorted.)
- A/T fluid temperature sensor 1
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "ENGINE" with CONSULT-III.
3. Start engine and maintain the following conditions for at least 10 minutes (Total). (It is not necessary to maintain continuously.)
VHCL/S SE-A/T: 10 km/h (6 MPH) or more
ACCELE POSI: More than 1.0/8
SLCT LVR POSI: "D" position
4. If DTC is detected, go to See: P1710.
WITH GST
Follow the procedure "With CONSULT-III".
Diagnosis Procedure
1.CHECK A/T FLUID TEMPERATURE SENSOR 1 SIGNAL
With CONSULT-III
1. Start engine.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Read out the value of "ATF TEMP SE 1".
OK or NG
OK - GO TO 5.
NG - GO TO 2.
2.CHECK A/T FLUID TEMPERATURE SENSOR 1
Check A/T fluid temperature sensor 1. See: P1710.
OK or NG
OK - GO TO 3.
NG - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
3.CHECK SUB-HARNESS
1. Disconnect transmission range switch connector and TCM connector.
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2. Check continuity between transmission range switch connector
(A) terminals and TCM connector (B) terminals.
3. If OK, check harness for short to ground and short to power.
OK or NG
OK - GO TO 4.
NG - Replace open circuit or short to ground and short to power in harness or connectors.
4.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
1. Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Main Power Supply And Ground Circuit.
2. Reinstall any part removed.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
5.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P1710.
OK or NG
OK - INSPECTION END
NG - GO TO 1.
Component Inspection
A/T FLUID TEMPERATURE SENSOR 1
1. Remove control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
2. Check resistance between transmission range switch connector
(A) terminals.
3. If NG, replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and
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Repair.
P1721
P1721 VEHICLE SPEED SIGNAL
Description
The vehicle speed signal is transmitted from combination meter to TCM by CAN communication line. The signal functions as an auxiliary device
to the output speed sensor when it is malfunctioning. The TCM will then use the vehicle speed signal.
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is not an OBD-II self-diagnostic item.
- Diagnostic trouble code "P1721" with CONSULT-III is detected when TCM does not receive the proper vehicle speed signal (input by CAN
communication) from combination meter.
Possible Cause
Harness or connectors
(The sensor circuit is open or shorted.)
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start engine and maintain the following conditions for at least 5 consecutive seconds.
ACCELE POSI: 1.0/8 or less
VHCL/S SE-MTR: 30 km/h (17 MPH) or more
4. If DTC is detected, go to See: P1721.
Diagnosis Procedure
1.CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures/CONSULT-III Function (Transmission).
Is a malfunction in the CAN communication indicated in the results?
YES - Check CAN communication line. See: U Code Charts/U1000/TM.
NO - GO TO 2.
2.CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Drive vehicle and read out the value of "VHCL/S SE-MTR".
OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.CHECK COMBINATION METERS
Check combination meter. See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Initial Inspection and Diagnostic
Overview/Work Flow.
OK or NG
OK - GO TO 4.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 398
NG - Repair or replace damaged parts.
4.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P1721.
OK or NG
OK - INSPECTION END
NG - GO TO 5.
5.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 6.
NG - Repair or replace damaged parts.
6.DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
P1730
P1730 INTERLOCK
Description
Fail-safe function to detect interlock conditions.
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P1730" with CONSULT-III is detected when TCM does not receive the proper voltage signal from the sensor and
switch.
- TCM monitors and compares gear position and conditions of each ATF pressure switch when gear is steady.
Possible Cause
- Harness or connectors
(The solenoid and switch circuit is open or shorted.)
- Low coast brake solenoid valve
- ATF pressure switch 2
DTC Confirmation Procedure
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 2 consecutive seconds.
SLCT LVR POSI: "D" position
5. If DTC is detected, go to See: P1730.
WITH GST
Follow the procedure "With CONSULT-III".
Judgment of A/T Interlock
- When A/T Interlock is judged to be malfunctioning, the vehicle should be fixed in 2GR, and should be set in a condition in which it can travel.
NOTE:
When the vehicle is driven fixed in 2GR, a input speed sensor malfunction is displayed, but this is not a input speed sensor malfunction.
- When interlock is detected at 3GR or more, it is locked at 2GR.
Diagnosis Procedure
1.SELF-DIAGNOSIS
With CONSULT-III
1. Drive vehicle.
2. Stop vehicle and turn ignition switch "OFF".
3. Turn ignition switch "ON".
4. Select "SELF-DIAG RESULTS" mode for "TRANSMISSION" with CONSULT-III.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 399
OK or NG
OK - GO TO 2.
NG - Check low coast brake solenoid valve circuit and function. See: P1772, See: P1774.
2.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P1730.
OK or NG
OK - INSPECTION END
NG - GO TO 3.
3.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 4.
NG - Repair or replace damaged parts.
4.DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
P1731
P1731 1ST ENGINE BRAKING
Description
Fail-safe function to prevent sudden decrease in speed by engine brake other than at "1" position.
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is not an OBD-II self-diagnostic item.
- Diagnostic trouble code "P1731" with CONSULT-III is detected under the following conditions.
- When TCM does not receive the proper voltage signal from the sensor.
- When TCM monitors ATF pressure switch 2 and solenoid monitor value, and detects as irregular when engine brake of 1GR acts other than at 1
position.
Possible Cause
- Harness or connectors
(The sensor circuit is open or shorted.)
- Low coast brake solenoid valve
- ATF pressure switch 2
DTC Confirmation Procedure
NOTE:
If "DTC Confirmation Procedure" has been previously preformed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 2 consecutive seconds.
ENGINE SPEED: 1,200 rpm
SLCT LVR POSI: "1" position
GEAR: 1st
5. If DTC is detected, go to See: P1731.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 400
Diagnosis Procedure
1.CHECK INPUT SIGNALS
With CONSULT-III
1. Start the engine.
2. Select "SELECTION FROM MENU" in "DATA MONITOR" for "TRANSMISSION" with CONSULT-III"
3. Drive vehicle in the "1" position (1GR), and confirm the ON/OFF actuation of "ATF PRES SW 2" and "ON
OFF SOL".
OK or NG
OK - GO TO 4.
NG - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
4.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P1731.
OK or NG
OK - INSPECTION END
NG - GO TO 2.
P1752
P1752 INPUT CLUTCH SOLENOID
Description
Input clutch solenoid valve is controlled by the TCM in response to signals sent from the transmission range switch, output speed sensor and
accelerator pedal position sensor. Gears will then be shifted to the optimum position.
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P1752" with CONSULT-III is detected under the following conditions.
- When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
- When TCM detects as irregular by comparing target value with monitor value.
Possible Cause
- Harness or connectors
(The solenoid circuit is open or shorted.)
- Input clutch solenoid valve
DTC Confirmation Procedure
CAUTION:
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 401
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
ACCELE POSI: 1.5/8 - 2.0/8
SLCT LVR POSI: "D" position
GEAR: 3rd --> 4th (I/C ON/OFF)
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.
5. If DTC is detected go to See: P1752.
WITH GST
Follow the procedure "With CONSULT-III".
Diagnosis Procedure
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch "ON".
2. Select "MAIN SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start the engine.
4. Read out the value of "I/C SOLENOID" while driving.
OK or NG
OK - GO TO 4.
NG - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
4.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P1752.
OK or NG
OK - INSPECTION END
NG - GO TO 2.
P1757
P1757 FRONT BRAKE SOLENOID
Description
Front brake solenoid valve is controlled by the TCM in response to signals sent from the transmission range switch, output speed sensor and
accelerator pedal position sensor. Gears will then be shifted to the optimum position.
CONSULT-III Reference Value in Data Monitor Mode
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 402
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P1757" with CONSULT-III is detected under the following conditions.
- When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
- When TCM detects as irregular by comparing target value with monitor value.
Possible Cause
- Harness or connectors
(The solenoid circuit is open or shorted.)
- Front brake solenoid valve
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
ACCELE POSI: 1.5/8 - 2.0/8
SLCT LVR POSI: "D" position
GEAR: 3rd --> 4th (FR/B ON/OFF)
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.
5. If DTC is detected go to See: P1757.
WITH GST
Follow the procedure "With CONSULT-III".
Diagnosis Procedure
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch "ON".
2. Select "MAIN SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start engine.
4. Read out the value of "FR/B SOLENOID" while driving.
OK or NG
OK - GO TO 4.
NG - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 403
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
4.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P1757.
OK or NG
OK - INSPECTION END
NG - GO TO 2.
P1762
P1762 DIRECT CLUTCH SOLENOID
Description
Direct clutch solenoid valve is controlled by the TCM in response to signals sent from the transmission range switch, output speed sensor and
accelerator pedal position sensor. Gears will then be shifted to the optimum position.
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P1762" with CONSULT-III is detected under the following conditions.
- When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
- When TCM detects as irregular by comparing target value with monitor value.
Possible Cause
- Harness or connectors
(The solenoid circuit is open or shorted.)
- Direct clutch solenoid valve
DTC Confirmation Procedure
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
ACCELE POSI: 1.5/8 - 2.0/8
SLCT LVR POSI: "D" position
GEAR: 1st --> 2nd (D/C ON/OFF)
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.
5. If DTC is detected, go to See: P1762.
WITH GST
Follow the procedure "With CONSULT-III".
Diagnosis Procedure
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch "ON".
2. Select "MAIN SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start the engine.
4. Read out the value of "D/C SOLENOID" while driving.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 404
OK or NG
OK - GO TO 4.
NG - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
4.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P1762.
OK or NG
OK - INSPECTION END
NG - GO TO 2.
P1767
P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID
Description
High and low reverse clutch solenoid valve is controlled by the TCM in response to signals sent from the transmission range switch, output speed
sensor and accelerator pedal position sensor. Gears will then be shifted to the optimum position.
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P1767" with CONSULT-III or is detected under the following conditions.
- When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
- When TCM detects as irregular by comparing target value with monitor value.
Possible Cause
- Harness or connectors
(The solenoid circuit is open or shorted.)
- High and low reverse clutch solenoid valve
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 405
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
ACCELE POSI: 1.5/8 - 2.0/8
SLCT LVR POSI: "D" position
GEAR: 2nd --> 3rd (HLR/C ON/OFF)
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.
5. If DTC is detected, go to See: P1767.
WITH GST
Follow the procedure "With CONSULT-III".
Diagnosis Procedure
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch "ON".
2. Select "MAIN SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start the engine.
4. Read out the value of "HLR/C SOLENOID" while driving.
OK or NG
OK - GO TO 4.
NG - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
4.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P1767.
OK or NG
OK - INSPECTION END
NG - GO TO 2.
P1772
P1772 LOW COAST BRAKE SOLENOID
Description
Low coast brake solenoid valve is turned "ON" or "OFF" by the TCM in response to signals sent from the transmission range switch, output speed
sensor and accelerator pedal position sensor. Gears will then be shifted to the optimum position.
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P1772" with CONSULT-III is detected when TCM detects an improper voltage drop when it tries to operate the
solenoid valve.
Possible Cause
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 406
- Harness or connectors
(The solenoid circuit is open or shorted.)
- Low coast brake solenoid valve
DTC Confirmation Procedure
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "ENGINE" with CONSULT-III.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
SLCT LVR POSI: "1" or "2"
GEAR: "1st" or "2nd" (LC/B ON/OFF)
5. If DTC is detected, go to See: P1772.
WITH GST
Follow the procedure "With CONSULT-III".
Diagnosis Procedure
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch "ON".
2. Select "SELECTION FROM MENU" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start the engine.
4. Read out the value of "ON OFF SOL" while driving.
OK or NG
OK - GO TO 4.
NG - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
4.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P1772.
OK or NG
OK - INSPECTION END
NG - GO TO 2.
P1774
P1774 LOW COAST BRAKE SOLENOID
Description
- Low coast brake solenoid valve is turned "ON" or "OFF" by the TCM in response to signals sent from the transmission range switch, output
speed sensor and accelerator pedal position sensor. Gears will then be shifted to the optimum position.
- This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical malfunction such as control valve sticking,
improper solenoid valve operation.
CONSULT-III Reference Value in Data Monitor Mode
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 407
On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P1774" with CONSULT-III is detected under the following conditions.
- When TCM detects that actual gear ratio is irregular, and relation between gear position and condition of
ATF pressure switch 2 is irregular during depressing accelerator pedal. (Other than during shift change)
- When TCM detects that relation between gear position and condition of ATF pressure switch 2 is irregular during releasing accelerator pedal.
(Other than during shift change)
Possible Cause
- Harness or connectors
(The solenoid and switch circuits are open or shorted.)
- Low coast brake solenoid valve
- ATF pressure switch 2
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds
before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Start engine.
2. Accelerate vehicle to maintain the following conditions.
SLCT LVR POSI: "1" or "2" position
GEAR: "1st" or "2nd" (LC/B ON/OFF)
3. Perform step "2" again.
4. Turn ignition switch "OFF", then perform step "1" to "3" again.
5. Check "SELF-DIAG RESULTS" mode for "TRANSMISSION" with CONSULT-III. If DTC (P1774) is detected, See: P1774.
If DTC (P1772) is detected, go to See: P1772.
WITH GST
Follow the procedure "With CONSULT-III".
Diagnosis Procedure
1.CHECK INPUT SIGNALS
With CONSULT-III
1. Start the engine.
2. Select "SELECTION FROM MENU" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Drive vehicle in the "1" or "2" position ("11" or "22" gear) and confirm the ON/OFF actuation of the "ATF
PRES SW 2" and "ON OFF SOL".
OK or NG
OK - GO TO 4.
NG - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 408
Tests and General Diagnostics/Main Power Supply And Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
4.CHECK DTC
Perform "DTC Confirmation Procedure".
- See: P1774.
OK or NG
OK - INSPECTION END
NG - GO TO 2.
P1805
P1805 BRAKE SWITCH
Description
Brake switch signal is applied to the ECM through the stop lamp switch when the brake pedal is depressed.
This signal is used mainly to decrease the engine speed when the vehicle is driving.
On Board Diagnosis Logic
The MIL will not light up for this self-diagnosis.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode.
DTC Confirmation Procedure
1. Turn ignition switch ON.
2. Fully depress the brake pedal for at least 5 seconds.
3. Erase the DTC with CONSULT-III.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to See: P1805.
Diagnosis Procedure
1.CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Check the stop lamp when depressing and releasing the brake pedal.
OK or NG
OK - GO TO 4.
NG - GO TO 2.
2.CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 409
1. Disconnect stop lamp switch harness connector.
2. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-III or tester.
Voltage: Battery voltage
OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M31, E152
- Fuse block (J/B) connector M60
- 10A fuse (No. 15)
- Harness for open and short between stop lamp switch and battery
- Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 101 and stop lamp switch terminal 2. Refer to Wiring Diagram.
Voltage: Battery voltage
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 5.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK STOP LAMP SWITCH
See: P1805 .
OK or NG
OK - GO TO 6.
NG - Replace stop lamp switch.
6.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
STOP LAMP SWITCH
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 410
1. Disconnect stop lamp switch harness connector.
2. Check continuity between stop lamp switch terminals 1 and 2 under the following conditions.
3. If NG, adjust stop lamp switch installation, See: Brakes and Traction Control/Brake Pedal Assy/Service and Repair/Inspection and
Adjustment, and perform step 2 again.
P2100
P2100, P2103 THROTTLE CONTROL MOTOR RELAY
Component Description
Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle control motor relay is ON/OFF
controlled by the ECM. When the ignition switch is turned ON, the ECM sends an ON signal to throttle control motor relay and battery voltage is
provided to the ECM. When the ignition switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is
not provided to the ECM.
On Board Diagnosis Logic
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 411
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
PROCEDURE FOR DTC P2100
1. Turn ignition switch ON and wait at least 2 seconds.
2. Start engine and let it idle for 5 seconds.
3. Check DTC.
4. If DTC is detected, go to See: P2100.
PROCEDURE FOR DTC P2103
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V.
1. Turn ignition switch ON and wait at least 1 second.
2. Check DTC.
3. If DTC is detected, go to See: P2100.
Diagnosis Procedure
1.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Check voltage between ECM terminal 104 and ground with
CONSULT-III or tester.
Voltage: Battery voltage
OK or NG
OK - GO TO 4.
NG - GO TO 2.
2.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E122.
3. Check continuity between ECM terminal 104 and IPDM E/R terminal 47. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 3.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK FUSE
1. Disconnect 20 A fuse.
2. Check 20 A (No. 52) fuse for blown.
OK or NG
OK - GO TO 7.
NG - Replace 20 A fuse.
4.CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 412
Check voltage between ECM terminal 3 and ground under the following conditions with CONSULT-III or tester.
OK or NG
OK - GO TO 7.
NG - GO TO 5.
5.CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect IPDM E/R harness connector E119.
4. Check continuity between ECM terminal 3 and IPDM E/R terminal 6. Refer to Wiring Diagram.
Continuity should exist.
5. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 7.
NG - GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- Harness for open or short between ECM and IPDM E/R
- Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
OK or NG
OK - Replace IPDM E/R. See: Power and Ground Distribution/Power Distribution Module/Service and Repair.
NG - Repair or replace harness or connectors.
P2101
P2101 ELECTRIC THROTTLE CONTROL FUNCTION
Description
NOTE:
If DTC P2101 is displayed with DTC P2100 or 2119, first perform the trouble diagnosis for DTC P2100 or P2119. See: P2100 or See:
P2119.
Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc.
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feedback to the ECM to control the
throttle control motor to make the throttle valve opening angle properly in response to driving condition.
On Board Diagnosis Logic
This self-diagnosis has the one trip detection logic.
FAIL-SAFE MODE
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 413
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V when engine is running.
1. Turn ignition switch ON and wait at least 2 seconds.
2. Start engine and let it idle for 5 seconds.
3. Check DTC.
4. If DTC is detected, go to See: P2101.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Power Supply
And Ground Circuit/Ground Inspection .
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I
1. Check voltage between ECM terminal 3 and ground under the following conditions with CONSULT-III or tester.
OK or NG
OK - GO TO 9.
NG - GO TO 3.
3.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 414
2. Check voltage between ECM terminal 104 and ground with
CONSULT-III or tester.
Voltage: Battery voltage
OK or NG
OK - GO TO 6.
NG - GO TO 4.
4.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E122.
3. Check harness continuity between ECM terminal 104 and IPDM E/R terminal 47. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 5.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK FUSE
1. Disconnect 20 A fuse.
2. Check 20 A (No. 52) fuse for blown.
OK or NG
OK - GO TO 8.
NG - Replace 20 A fuse.
6.CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E119.
3. Check harness continuity between ECM terminal 3 and IPDM E/R terminal 6. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 8.
NG - GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- Harness for open or short between ECM and IPDM E/R
- Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
OK or NG
OK - Replace IPDM E/R. See: Power and Ground Distribution/Power Distribution Module/Service and Repair .
NG - Repair or replace harness or connectors.
9.CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Turn ignition switch OFF.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 415
2. Disconnect electric throttle control actuator harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 10.
NG - Repair or replace.
10.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Remove the intake air duct.
2. Check if foreign matter is caught between the throttle valve and the housing.
OK or NG
OK - GO TO 11.
NG - Remove the foreign matter and clean the electric throttle control actuator inside.
11.CHECK THROTTLE CONTROL MOTOR
See: P2101 .
OK or NG
OK - GO TO 12.
NG - GO TO 13.
12.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
OK or NG
OK - GO TO 13.
NG - Repair or replace harness or connectors.
13.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
3. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
Component Inspection
THROTTLE CONTROL MOTOR
1. Disconnect electric throttle control actuator harness connector.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 416
2. Check resistance between terminals 5 and 6.
Resistance: Approximately 1 - 15 ohms [at 25 癈 (77癋)]
3. If NG, replace electric throttle control actuator and go to next step.
4. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning .
5. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection .
P2103
P2100, P2103 THROTTLE CONTROL MOTOR RELAY
Component Description
Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle control motor relay is ON/OFF
controlled by the ECM. When the ignition switch is turned ON, the ECM sends an ON signal to throttle control motor relay and battery voltage is
provided to the ECM. When the ignition switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is
not provided to the ECM.
On Board Diagnosis Logic
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
PROCEDURE FOR DTC P2100
1. Turn ignition switch ON and wait at least 2 seconds.
2. Start engine and let it idle for 5 seconds.
3. Check DTC.
4. If DTC is detected, go to See: P2100.
PROCEDURE FOR DTC P2103
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V.
1. Turn ignition switch ON and wait at least 1 second.
2. Check DTC.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 417
3. If DTC is detected, go to See: P2100.
Diagnosis Procedure
1.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Check voltage between ECM terminal 104 and ground with
CONSULT-III or tester.
Voltage: Battery voltage
OK or NG
OK - GO TO 4.
NG - GO TO 2.
2.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E122.
3. Check continuity between ECM terminal 104 and IPDM E/R terminal 47. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 3.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK FUSE
1. Disconnect 20 A fuse.
2. Check 20 A (No. 52) fuse for blown.
OK or NG
OK - GO TO 7.
NG - Replace 20 A fuse.
4.CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I
Check voltage between ECM terminal 3 and ground under the following conditions with CONSULT-III or tester.
OK or NG
OK - GO TO 7.
NG - GO TO 5.
5.CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 418
3. Disconnect IPDM E/R harness connector E119.
4. Check continuity between ECM terminal 3 and IPDM E/R terminal 6. Refer to Wiring Diagram.
Continuity should exist.
5. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 7.
NG - GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- Harness for open or short between ECM and IPDM E/R
- Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
OK or NG
OK - Replace IPDM E/R. See: Power and Ground Distribution/Power Distribution Module/Service and Repair.
NG - Repair or replace harness or connectors.
P2118
P2118 THROTTLE CONTROL MOTOR
Component Description
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feedback to the ECM to control the
throttle control motor to make the throttle valve opening angle properly in response to driving condition.
On Board Diagnosis Logic
This self-diagnosis has the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON and wait at least 2 seconds.
3. Start engine and let it idle for 5 seconds.
4. Check DTC.
5. If DTC is detected, go to See: P2118.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/Ground Inspection.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 419
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Disconnect electric throttle control actuator harness connector.
- Illustration shows the view with intake air duct removed.
2. Disconnect ECM harness connector.
3. Check harness continuity between the following terminals. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 3.
NG - Repair or replace.
3.CHECK THROTTLE CONTROL MOTOR
See: P2118.
OK or NG
OK - GO TO 4.
NG - GO TO 5.
4.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
OK or NG
OK - GO TO 5.
NG - Repair or replace harness or connectors.
5.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
3. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
Component Inspection
THROTTLE CONTROL MOTOR
1. Disconnect electric throttle control actuator harness connector.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 420
2. Check resistance between terminals 5 and 6.
Resistance: Approximately 1 - 15 ohms [at 25 癈 (77癋)]
3. If NG, replace electric throttle control actuator and go to next step.
4. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
5. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
P2119
P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
Component Description
Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc.
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The throttle position sensor detects the throttle valve position, and the opening and closing speed of the throttle valve and feeds the voltage signals
to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle control motor to
make the throttle valve opening angle properly in response to driving condition.
On Board Diagnosis Logic
This self-diagnosis has one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
NOTE:
- Perform PROCEDURE FOR MALFUNCTION A AND B first. If the DTC cannot be confirmed, perform
PROCEDURE FOR MALFUNCTION C.
- If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
PROCEDURE FOR MALFUNCTION A AND B
1. Turn ignition switch ON and wait at least 1 second.
2. Shift selector lever to D position and wait at least 3 seconds.
3. Shift selector lever to P or N position.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON and wait at least 1 second.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 421
6. Shift selector lever to D position and wait at least 3 seconds.
7. Shift selector lever to P or N position.
8. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
9. Check DTC.
10. If DTC is detected, go to See: P2119.
PROCEDURE FOR MALFUNCTION C
1. Turn ignition switch ON and wait at least 1 second.
2. Shift selector lever to D position and wait at least 3 seconds.
3. Shift selector lever to P position.
4. Start engine and let it idle for 3 seconds.
5. Check DTC.
6. If DTC is detected, go to See: P2119.
Diagnosis Procedure
1.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Remove the intake air duct.
2. Check if a foreign matter is caught between the throttle valve and the housing.
OK or NG
OK - GO TO 2.
NG - Remove the foreign matter and clean the electric throttle control actuator inside.
2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
3. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
P2122
P2122, P2123 APP SENSOR
Component Description
The accelerator pedal position sensor is installed on the upper end of the accelerator pedal assembly. The sensor detects the accelerator position
and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors are a kind of potentiometers which transform the accelerator pedal position into
output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from these signals and controls the throttle control motor based on these signals.
Idle position of the accelerator pedal is determined by the ECM receiving the signal from the accelerator pedal position sensor. The ECM uses this
signal for the engine operation such as fuel cut.
On Board Diagnosis Logic
These self-diagnoses have the one trip detection logic.
NOTE:
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 422
If DTC P2122 or P2123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. See: P0643.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to See: P2122.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/Ground Inspection .
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 423
3. Check voltage between APP sensor terminal 7 and ground with
CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 3.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK APP SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 82 and APP sensor terminal 1. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 4.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 106 and APP sensor terminal 2. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 5.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK APP SENSOR
See: P2122 .
OK or NG
OK - GO TO 7.
NG - GO TO 6.
6.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace the accelerator pedal assembly.
2. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
3. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
4. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
7.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 424
3. Check voltage between ECM terminals 106 (APP sensor 1 signal), 98 (APP sensor 2 signal) and ground under the following conditions.
4. If NG, replace accelerator pedal assembly and go to next step.
5. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
6. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
7. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
P2123
P2122, P2123 APP SENSOR
Component Description
The accelerator pedal position sensor is installed on the upper end of the accelerator pedal assembly. The sensor detects the accelerator position
and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors are a kind of potentiometers which transform the accelerator pedal position into
output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from these signals and controls the throttle control motor based on these signals.
Idle position of the accelerator pedal is determined by the ECM receiving the signal from the accelerator pedal position sensor. The ECM uses this
signal for the engine operation such as fuel cut.
On Board Diagnosis Logic
These self-diagnoses have the one trip detection logic.
NOTE:
If DTC P2122 or P2123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. See: P0643.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 425
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to See: P2122.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/Ground Inspection .
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 7 and ground with
CONSULT-III or tester.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 426
Voltage: Approximately 5 V
OK or NG
OK - GO TO 3.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK APP SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 82 and APP sensor terminal 1. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 4.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 106 and APP sensor terminal 2. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 5.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK APP SENSOR
See: P2122 .
OK or NG
OK - GO TO 7.
NG - GO TO 6.
6.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace the accelerator pedal assembly.
2. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
3. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
4. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
7.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check voltage between ECM terminals 106 (APP sensor 1 signal), 98 (APP sensor 2 signal) and ground under the following conditions.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 427
4. If NG, replace accelerator pedal assembly and go to next step.
5. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
6. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
7. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
P2127
P2127, P2128 APP SENSOR
Component Description
The accelerator pedal position sensor is installed on the upper end of the accelerator pedal assembly. The sensor detects the accelerator position
and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors are a kind of potentiometers which transform the accelerator pedal position into
output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from these signals and controls the throttle control motor based on these signals.
Idle position of the accelerator pedal is determined by the ECM receiving the signal from the accelerator pedal position sensor. The ECM uses this
signal for the engine operation such as fuel cut.
On Board Diagnosis Logic
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 428
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to See: P2127.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Power Supply
And Ground Circuit/Ground Inspection .
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 6 and ground with
CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 7.
NG - GO TO 3.
3.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 6 and ECM terminal 91. Refer to Wiring Diagram.
Continuity should exist.
OK or NG
OK - GO TO 4.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 429
NG - Repair open circuit.
4.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the following terminals
OK or NG
OK - GO TO 5.
NG - Repair short to ground or short to power in harness or connectors.
5.CHECK THROTTLE POSITION SENSOR
See: P2135 .
OK or NG
OK - GO TO 11.
NG - GO TO 6.
6.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
3. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
7.CHECK APP SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 83 and APP sensor terminal 3. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 8.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 98 and APP sensor terminal 5. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 9.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK APP SENSOR
See: P2127.
OK or NG
OK - GO TO 11.
NG - GO TO 10.
10.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace the accelerator pedal assembly.
2. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
3. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
4. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
11.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 430
3. Check voltage between ECM terminals 106 (APP sensor 1 signal), 98 (APP sensor 2 signal) and ground under the following conditions.
4. If NG, replace accelerator pedal assembly and go to next step.
5. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
6. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
7. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
P2128
P2127, P2128 APP SENSOR
Component Description
The accelerator pedal position sensor is installed on the upper end of the accelerator pedal assembly. The sensor detects the accelerator position
and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors are a kind of potentiometers which transform the accelerator pedal position into
output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from these signals and controls the throttle control motor based on these signals.
Idle position of the accelerator pedal is determined by the ECM receiving the signal from the accelerator pedal position sensor. The ECM uses this
signal for the engine operation such as fuel cut.
On Board Diagnosis Logic
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 431
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to See: P2127.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Power Supply
And Ground Circuit/Ground Inspection .
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 6 and ground with
CONSULT-III or tester.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 432
Voltage: Approximately 5 V
OK or NG
OK - GO TO 7.
NG - GO TO 3.
3.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 6 and ECM terminal 91. Refer to Wiring Diagram.
Continuity should exist.
OK or NG
OK - GO TO 4.
NG - Repair open circuit.
4.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the following terminals
OK or NG
OK - GO TO 5.
NG - Repair short to ground or short to power in harness or connectors.
5.CHECK THROTTLE POSITION SENSOR
See: P2135 .
OK or NG
OK - GO TO 11.
NG - GO TO 6.
6.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
3. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
7.CHECK APP SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 83 and APP sensor terminal 3. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 8.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 98 and APP sensor terminal 5. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 9.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK APP SENSOR
See: P2127.
OK or NG
OK - GO TO 11.
NG - GO TO 10.
10.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace the accelerator pedal assembly.
2. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
3. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
4. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 433
11.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check voltage between ECM terminals 106 (APP sensor 1 signal), 98 (APP sensor 2 signal) and ground under the following conditions.
4. If NG, replace accelerator pedal assembly and go to next step.
5. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
6. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
7. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
P2135
P2135 TP SENSOR
Component Description
Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc. The throttle position sensor responds to the throttle
valve movement.
The throttle position sensor has the two sensors. These sensors are a kind of potentiometers which transform the throttle valve position into output
voltage, and emit the voltage signal to the ECM. In addition, these sensors detect the opening and closing speed of the throttle valve and feed the
voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle
control motor to make the throttle valve opening angle properly in response to driving condition.
On Board Diagnosis Logic
This self-diagnosis has the one trip detection logic.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 434
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to See: P2135.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Power Supply
And Ground Circuit/Ground Inspection .
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-I
1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition switch ON.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 435
3. Check voltage between electric throttle control actuator terminal
2 and ground with CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 7.
NG - GO TO 3.
3.CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 2 and ECM terminal 47. Refer to Wiring Diagram.
Continuity should exist.
OK or NG
OK - GO TO 4.
NG - Repair open circuit.
4.CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the following terminals.
OK or NG
OK - GO TO 5.
NG - Repair short to ground or short to power in harness or connectors.
5.CHECK ACCELERATOR PEDAL POSITION SENSOR
See: P2138 .
OK or NG
OK - GO TO 11.
NG - GO TO 6.
6.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace the accelerator pedal assembly.
2. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
3. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
4. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
7.CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 4 and ECM terminal 66. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 8.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 50 and electric throttle control actuator terminal 1, ECM terminal 69 and electric throttle
control actuator terminal 3. Refer to Wiring Diagram.
Continuity should exist.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 436
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 9.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK THROTTLE POSITION SENSOR
See: P2135.
OK or NG
OK - GO TO 11.
NG - GO TO 10.
10.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
3. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
11.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
THROTTLE POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning .
3. Turn ignition switch ON.
4. Set selector lever to D position.
5. Check voltage between ECM terminals 50 (TP sensor 1 signal), 69 (TP sensor 2 signal) and ground under the following conditions.
6. If NG, replace electric throttle control actuator and go to the next step.
7. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
8. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
P2138
P2138 APP SENSOR
Component Description
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 437
The accelerator pedal position sensor is installed on the upper end of the accelerator pedal assembly. The sensor detects the accelerator position
and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors are a kind of potentiometers which transform the accelerator pedal position into
output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from these signals and controls the throttle control motor based on these signals.
Idle position of the accelerator pedal is determined by the ECM receiving the signal from the accelerator pedal position sensor. The ECM uses this
signal for the engine operation such as fuel cut.
On Board Diagnosis Logic
This self-diagnosis has the one trip detection logic.
NOTE:
If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. See: P0643.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to See: P2138.
Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/Ground Inspection .
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 438
OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 7 and ground with
CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
OK - GO TO 3.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
1. Turn ignition switch ON.
2. Check voltage between APP sensor terminal 6 and ground with
CONSULT-III or tester.
Voltage: Approximately 5 V
OK or NG
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 439
OK - GO TO 8.
NG - GO TO 4.
4.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 6 and ECM terminal 91. Refer to Wiring Diagram.
Continuity should exist.
OK or NG
OK - GO TO 5.
NG - Repair open circuit in harness or connectors.
5.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-III
Check harness for short to power and short to ground, between the following terminals
OK or NG
OK - GO TO 6.
NG - Repair short to ground or short to power in harness connectors.
6.CHECK THROTTLE POSITION SENSOR
See: P2135 .
OK or NG
OK - GO TO 12.
NG - GO TO 7.
7.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
3. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
8.CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 82 and APP sensor terminal 1, ECM terminal 83 and
APP sensor terminal 3. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 9.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 106 and APP sensor terminal 2, ECM terminal 98 and
APP sensor terminal 5. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 10.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
10.CHECK ACCELERATOR PEDAL POSITION SENSOR
See: P2138.
OK or NG
OK - GO TO 12.
NG - GO TO 11.
11.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace the accelerator pedal assembly.
2. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
3. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
4. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.
- INSPECTION END
12.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Check Terminal and See: Testing and Inspection/Initial
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE)  P CODE Page 440
Inspection and Diagnostic Overview/Intermittent Incident.
- INSPECTION END
Component Inspection
ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check voltage between ECM terminals 106 (APP sensor 1 signal), 98 (APP sensor 2 signal) and ground under the following conditions.
4. If NG, replace accelerator pedal assembly and go to next step.
5. Perform See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position Sensor/Testing and Inspection.
6. Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Programming and Relearning/Throttle Valve
Closed Position Learning.
7. Perform See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Idle Speed/Testing and Inspection.