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2017 Nissan-Datsun Altima Technical Service Bulletin # 10-066 Date: 100507

2017 Nissan-Datsun Altima Technical Service Bulletin # 10-066 Date: 100507



Computers/Control - CAN Code, Diagnostic Tips/Guidelines



2017 Nissan-Datsun Altima L4-2.5L (QR25DE) Page 430



Classification: EL10-017



Reference: ITB10-066



Date: May 7, 2010



CAN COMMUNICATION CODES - DIAGNOSTIC TIPS & GUIDELINES



APPLIED VEHICLES: All 2005 - 2010 Nissan vehicles



SERVICE INFORMATION



Related to communication codes U1000, U1001, U1002, U1010:



^ Always diagnose the communication codes first.



^ When a module reports a U1000 code, it is typically operating normally; however, there is a communication error external to that module on the



CAN network.



^ U1000 indicates an error. V-CAN diagram or CAN Diag Support Monitor provides data to determine the location of the error.



Step 1



Complete the CAN diagnosis with CONSULT-III (C-III).



^ Open ASIST first and then open C-III using the Consult Utilities icon. This step will help identify the CAN type on many vehicles using the SIS



function.



^ Ensure the correct CAN type is selected. Selecting the incorrect CAN type will lead to mis-diagnosis.



Step 2



View the V-CAN screen or print all CAN Diag Support Monitors (shown below).



^ The V-CAN diagram screen is a snap shot only. It must be refreshed after any changes.



Step 3



Read the V-CAN diagram using the key provided OR reference the appropriate Electronic Service Manual (ESM) to analyze the CAN Diag Support



Monitor data. Determine the incident according to the display.



Step 4



If V-CAN diagnosis is not available or inconclusive, refer to the basic CAN diagnostic guidelines shown below. These represent electrical values of



the CAN system measured at the Data Link Connector or connectors at non-termination units.



To properly perform these basic checks:



^ The battery should be disconnected for resistance checks.



^ The ignition should be off.



Tips if a control module is the suspected root cause:



^ Improper module configuration or incorrect part numbers may set CAN DTCs.



^ Low battery voltage may set CAN DTCs.



^ Always confirm the power, ground, and CAN resistance at a suspect module before replacing the module. Resistance should be close to 60 ohms



at the module (measured with the battery disconnected). The resistance at terminating modules should be close to 120 ohms. Examples of



terminating modules include IPDM, ECM, or BCM. Reference the appropriate ESM to determine the terminating modules.



2017 Nissan-Datsun Altima L4-2.5L (QR25DE) Page 431



DEFINITION OF CAN CODES



2017 Nissan-Datsun Altima L4-2.5L (QR25DE) Page 432



V-CAN Diagram Screen/CAN Diag Support Monitor - Step 3 Illustration



2017 Nissan-Datsun Altima L4-2.5L (QR25DE) Page 433



Battery is Possibly Connected - disconnected and recheck resistence



2017 Nissan-Datsun Altima L4-2.5L (QR25DE) Page 434



Normal Resistence - CAN Harness



2017 Nissan-Datsun Altima L4-2.5L (QR25DE) Page 435



Normal Resistance - CAN High to Ground



2017 Nissan-Datsun Altima L4-2.5L (QR25DE) Page 436



Normal Resistence - CAN Low to Ground



2017 Nissan-Datsun Altima L4-2.5L (QR25DE) Page 437



Open CAN Harness



2017 Nissan-Datsun Altima L4-2.5L (QR25DE) Page 438



Short - CAN High to CAN Low



2017 Nissan-Datsun Altima L4-2.5L (QR25DE) Page 439



Normal Voltage - CAN High



2017 Nissan-Datsun Altima L4-2.5L (QR25DE) Page 440



Normal Voltage - CAN Low

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