Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to "CONSULT FUNCTION (TRANSMISSION) ".

Is a malfunction in the CAN communication indicated in the results?

YES: Check CAN communication line. Refer to U1000 CAN COMM CIRCUIT .

NO: GO TO 2.
CHECK DTC WITH TCM
With CONSULT
1. Turn ignition switch ON. (Do not start engine.)
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT.
3. Depress accelerator pedal and read out the value of "ACCELE POSI".
4. Select "SELF-DIAG RESULTS" mode for "TRANSMISSION" with CONSULT. Refer to "CONSULT FUNCTION (TRANSMISSION) ".
  OK or NG
  
  OK: GO TO 4.
  
  NG: GO TO 3.
CHECK DTC WITH ECM
With CONSULT
1. Turn ignition switch ON. (Do not start engine.)
2. Select "SELF-DIAG RESULTS" mode for "ENGINE" with CONSULT. Refer to "CONSULT FUNCTION " (VQ40DE) or "CONSULT FUNCTION " (VK56DE).
  OK or NG
  
  OK: GO TO 4.
  
  NG: Check the DTC detected item. Refer to "CONSULT FUNCTION " (VQ40DE) or "CONSULT FUNCTION " (VK56DE).
  - If CAN communication line is detected, go to "DIAGNOSIS PROCEDURE ".
CHECK DTC
Perform "DTC Confirmation Procedure".
- Refer to "DTC CONFIRMATION PROCEDURE ".
  OK or NG
  
  OK: INSPECTION END
  
  NG: GO TO 5.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to "DIAGNOSIS PROCEDURE ".

OK or NG

OK: GO TO 6.

NG: Repair or replace damaged parts.
DETECT MALFUNCTIONING ITEM
Check the following.
- 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. Refer to "REMOVAL AND INSTALLATION ".
  
  NG: Repair or replace damaged parts.