Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Is a malfunction in the CAN communication indicated in the results?

Yes or No
1. Yes: Check CAN communication line. Refer to DTC U1000 CAN COMMUNICATION LINE .
2. No: GO TO 2.
CHECK DTC WITH TCM (With CONSULT-II)
1. Start engine.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
3. While monitoring engine speed, check for engine speed change corresponding to wide-open throttle position signal.
  
  Fig 1: CONSULT-II Display
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 3.
2. NG: Check the ignition signal circuit.
  - Refer to IGNITION SIGNAL in SYSTEM & COMPONENT TESTING - TITAN article in ENGINE PERFORMANCE.
CHECK TCM
Perform TCM input/output signal inspection. Refer to TCM INPUT/OUTPUT SIGNAL REFERENCE VALUES .

OK or NG
1. OK: GO TO 5.
2. NG: GO TO 4.
DETECT MALFUNCTIONING ITEM
Check the following items:
- Power supply and ground circuit for TCM.
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
1. OK: Replace the transmission assembly. Refer to REMOVAL & INSTALLATION - TITAN article.
2. NG: Repair or replace damaged parts.
CHECK DTC
Perform DTC Confirmation Procedure.
- Refer to DTC CONFIRMATION PROCEDURE .
OK or NG
1. OK: INSPECTION END
2. NG: GO TO 3.