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 MANUAL MODE SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "UNIFIED METER AND A/C AMP INPUT SIGNALS" in "DATA MONITOR" mode for "METER A/C AMP" with CONSULT-II.
3. Read out ON/OFF switching action of the "AT-M GEAR".
  
  Fig 1: CONSULT-II Display
  Courtesy of NISSAN MOTOR CO., U.S.A.
Without CONSULT-II

Drive vehicle in the manual mode, and confirm that the actual gear position and the meter's indication of the position mutually coincide when the selector lever is shifted to the "+ (up)" or "- (down)" side (1st --> 5th gear).

OK or NG
1. OK: GO TO 6.
2. NG: GO TO 3.
DETECT MALFUNCTIONING ITEM
Check the following items.
- Manual mode switch. Refer to COMPONENT INSPECTION .
- Pin terminals for damage or loose connection with harness connector.
- Open circuit or short to ground or short to power in harness or connector for A/T device (manual mode switch).
OK or NG
1. OK: GO TO 4.
2. NG: Repair or replace damaged parts.
CHECK TCM
Perform TCM input/output signal inspection. Refer to TCM INPUT/OUTPUT SIGNAL REFERENCE VALUES .

OK or NG
1. OK: GO TO 6.
2. NG: GO TO 5.
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 4.