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****************************Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE) U CODE 1
A L L Diagnostic Trouble Codes ( DTC ): U Code Charts
U0101
U0101 CAN COMM CIRCUIT
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 and wait at least 3 seconds.
2. Check DTC.
3. If DTC is detected, go to See: U0101.
Diagnosis Procedure
Go to See: Powertrain Management/Computers and Control Systems/Information Bus/Application and ID/CAN Communication Signal Chart.
U121A
U121A AV CONTROL UNIT
Description
Replace the AV control unit if this DTC is displayed. See: Accessories and Optional Equipment/Radio, Stereo, and Compact
Disc/Radio/Stereo/Service and Repair/AV Control Unit/Bose Audio/With Navigation.
DTC Logic
U121B
U121B AV CONTROL UNIT
Description
Replace the AV control unit if this DTC is displayed. See: Accessories and Optional Equipment/Radio, Stereo, and Compact
Disc/Radio/Stereo/Service and Repair/AV Control Unit/Bose Audio/With Navigation.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE) U CODE 2
DTC Logic
U121C
U121C AV CONTROL UNIT
Description
Replace the AV control unit if this DTC is displayed. See: Accessories and Optional Equipment/Radio, Stereo, and Compact
Disc/Radio/Stereo/Service and Repair/AV Control Unit/Bose Audio/With Navigation.
DTC Logic
U121D
U121D AV CONTROL UNIT
Description
Replace the AV control unit if this DTC is displayed. See: Accessories and Optional Equipment/Radio, Stereo, and Compact
Disc/Radio/Stereo/Service and Repair/AV Control Unit/Bose Audio/With Navigation.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE) U CODE 3
DTC Logic
U121E
U121E AV CONTROL UNIT
Description
Replace the AV control unit if this DTC is displayed. See: Accessories and Optional Equipment/Radio, Stereo, and Compact
Disc/Radio/Stereo/Service and Repair/AV Control Unit/Bose Audio/With Navigation.
DTC Logic
U121F
U121F AV CONTROL UNIT
Description
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE) U CODE 4
DTC Logic
Diagnosis Procedure
1.CHECK AV CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT
Check audio control unit power supply and ground circuit. See: Accessories and Optional Equipment/Radio, Stereo, and Compact Disc/Testing
and Inspection/Component Tests and General Diagnostics/Power Supply And Ground Circuit/AV Control Unit/Bose Audio/With Navigation.
Is inspection result OK?
YES - Inspection End.
NO - Repair malfunctioning parts.
ADP
U1000 CAN COMM CIRCUIT
Description
See: Powertrain Management/Computers and Control Systems/Information Bus/Description and Operation/CAN Communication System/System
Description.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1. STEP 1
Turn ignition switch ON and wait at least 3 seconds.
- GO TO 2
2. STEP 2
Check "Self diagnostic result" with CONSULT-III.
Is the DTC detected?
YES - Perform diagnosis procedure. See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and
Inspection/Initial Inspection and Diagnostic Overview/Trouble Diagnosis Procedure.
NO - Inspection End.
Special Repair Requirement
Refer to Owner's Manual.
Base Audio
U1000 CAN COMM CIRCUIT
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
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE) U CODE 5
with 2 communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring. Each control unit
transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. See: Powertrain Management/Computers and Control Systems/Information Bus/Application and ID/CAN
Communication Signal Chart.
DTC Logic
DTC DETECTION LOGIC
Diagnosis Procedure
1.PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check "Self Diagnostic Result" of "AV Control Unit".
Is "CAN COMM CIRCUIT" displayed?
YES - Refer to "LAN system". See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Initial
Inspection and Diagnostic Overview/CAN Fundamental/Trouble Diagnosis Flow Chart.
NO - Refer to General Information. See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Intermittent Incident.
Without Navigation
U1000 CAN COMM CIRCUIT
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, CAN-L) allowing a high rate of information transmission with less wiring. Each control unit
transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. See: Powertrain Management/Computers and Control Systems/Information Bus/Application and ID/CAN
Communication Signal Chart.
DTC Logic
DTC DETECTION LOGIC
Diagnosis Procedure
1.PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check "Self Diagnostic Result" of "AV Control Unit".
Is "CAN COMM CIRCUIT" displayed?
YES - Refer to "LAN system". See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Initial
Inspection and Diagnostic Overview/CAN Fundamental/Trouble Diagnosis Flow Chart.
NO - Refer to General Information. See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Intermittent Incident.
With Navigation
U1000 CAN COMM CIRCUIT
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, CAN-L) allowing a high rate of information transmission with less wiring. Each control unit
transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. See: Powertrain Management/Computers and Control Systems/Information Bus/Application and ID/CAN
Communication Signal Chart.
DTC Logic
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE) U CODE 6
DTC DETECTION LOGIC
Diagnosis Procedure
1.PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check "Self Diagnostic Result" of "AV Control Unit".
Is "CAN COMM CIRCUIT" displayed?
YES - Refer to "LAN system". See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Initial
Inspection and Diagnostic Overview/CAN Fundamental/Trouble Diagnosis Flow Chart.
NO - Refer to General Information. See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Intermittent Incident.
BCS
U1000 CAN COMM CIRCUIT
Description
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with
high data communication speed and excellent error detection ability. Modern vehicle is equipped with many electronic control unit, 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.
CAN Communication Signal Chart. See: Powertrain Management/Computers and Control Systems/Information Bus/Application and ID/CAN
Communication Signal Chart.
DTC Logic
DTC DETECTION LOGIC
Diagnosis Procedure
1. PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check "Self Diagnostic Result" of BCM.
Is "CAN COMM CIRCUIT" displayed?
YES - See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Initial Inspection and Diagnostic
Overview/CAN Fundamental/Trouble Diagnosis Flow Chart.
NO - See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Intermittent Incident.
BRC
U1000 CAN COMM CIRCUIT
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.
DTC Logic
DTC DETECTION LOGIC
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE) U CODE 7
Diagnosis Procedure
1.CHECK CONNECTOR
1. Turn ignition switch OFF, disconnect the ABS actuator and electric unit (control unit) connector, and check the terminals for deformation,
disconnection, looseness, and so on. If there is a malfunction, repair or replace the terminal.
2. Reconnect connector and perform self-diagnosis.
Is "CAN COMM CIRCUIT" displayed in self-diagnosis display items?
YES - Print out the self-diagnostic results, and See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and
Inspection/Initial Inspection and Diagnostic Overview/CAN Fundamental/Trouble Diagnosis Flow Chart.
NO - Connector terminal is loose, damaged, open, or shorted.
With Intelligent Key System
U1000 CAN COMM CIRCUIT
Description
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with
high data communication speed and excellent error detection ability. Modern vehicle is equipped with many electronic control unit, 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.
CAN Communication Signal Chart. See: Powertrain Management/Computers and Control Systems/Information Bus/Application and ID/CAN
Communication Signal Chart.
DTC Logic
DTC DETECTION LOGIC
Diagnosis Procedure
1.PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 second or more.
2. Check "Self Diagnostic Result".
Is "CAN COMM CIRCUIT" displayed?
YES - See: U1000/DLK/With Intelligent Key System.
NO - See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Intermittent Incident.
Without Intelligent Key System
U1000 CAN COMM CIRCUIT
Description
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with
high data communication speed and excellent error detection ability. Modern vehicle is equipped with many electronic control unit, 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.
CAN Communication Signal Chart. See: Powertrain Management/Computers and Control Systems/Information Bus/Application and ID/CAN
Communication Signal Chart.
DTC Logic
DTC DETECTION LOGIC
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE) U CODE 8
Diagnosis Procedure
1.PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 second or more.
2. Check "Self Diagnostic Result".
Is "CAN COMM CIRCUIT" displayed?
YES - See: U1000/DLK/Without Intelligent Key System.
NO - See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Intermittent Incident.
MWI
DTC U1000 CAN COMMUNICATION
DTC Logic
DTC DETECTION LOGIC
Diagnosis Procedure
Symptom: Displays "CAN COMM CIRC [U1000]" as a self-diagnosis result of combination meter.
1.CHECK CAN COMMUNICATION
Select "SELF-DIAG RESULTS" mode for "METER/M&A" with CONSULT-III.
- Go to "LAN system". See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Initial Inspection
and Diagnostic Overview/CAN Fundamental/Trouble Diagnosis Flow Chart.
PCS
U1000 CAN COMM CIRCUIT
Description
See: Powertrain Management/Computers and Control Systems/Information Bus/Description and Operation/CAN Communication System/System
Description.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
Diagnosis Procedure
1. PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check "SELF-DIAG RESULTS" of IPDM E/R.
Is "CAN COMM CIRCUIT" displayed?
YES - See: Powertrain Management/Computers and Control Systems/Information Bus/Description and Operation/CAN Communication
System/CAN Communication Control Circuit.
NO - See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Intermittent Incident.
Nissan-Datsun Truck Armada 2WD V8-5.6L (VK56DE) U CODE 9
With Intelligent Key System
U1000 CAN COMM CIRCUIT
Description
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with
high data communication speed and excellent error detection ability. Modern vehicle is equipped with many electronic control unit, 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.
CAN Communication Signal Chart, See: Powertrain Management/Computers and Control Systems/Information Bus/Description and
Operation/CAN Communication System/System Description.
DTC Logic
DTC DETECTION LOGIC
Diagnosis Procedure
1.PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check "Self Diagnostic Result".
Is "CAN COMM CIRCUIT" displayed?
YES - See: Powertrain Management/Computers and Control Systems/Information Bus/Description and Operation/CAN Communication
System/CAN Communication Control Circuit.
NO - See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Intermittent Incident.
Without Intelligent Key System
U1000 CAN COMM CIRCUIT
Description
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with
high data communication speed and excellent error detection ability. Modern vehicle is equipped with many electronic control unit, 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.
CAN Communication Signal Chart, See: Powertrain Management/Computers and Control Systems/Information Bus/Application and ID/CAN
Communication Signal Chart.
DTC Logic
DTC DETECTION LOGIC
Diagnosis Procedure
1.PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check "Self Diagnostic Result".
