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. Start engine.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT.
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.
  - Refer to "DIAGNOSIS PROCEDURE " (VQ40DE) or "DIAGNOSIS PROCEDURE " (VK56DE).
CHECK DTC
Perform "DTC Confirmation Procedure".
- Refer to "DTC CONFIRMATION PROCEDURE ".
  OK or NG
  
  OK: INSPECTION END
  
  NG: GO TO 4.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to "DIAGNOSIS PROCEDURE ".

OK or NG

OK: GO TO 5.

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.