Diagnostic Procedure

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

CHECK DTC WITH ECM
With CONSULT-II
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "SELF-DIAG RESULTS" mode for "ENGINE" with CONSULT-II. Refer to "CONSULT-II FUNCTION ".
OK or NG
1. OK: GO TO 2.
2. NG: Check the DTC detected item, go to INDEX FOR DTC .
  - If CAN communication line is detected, go to "DTC U1000 CAN COMMUNICATION LINE ".
    
    Fig 1: CONSULT-II Screen Display - ENGINE
    Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK DTC WITH TCM
With CONSULT-II
1. Start engine.
2. Select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-II.
3. While monitoring "ENGINE SPEED", check for engine speed change corresponding to "ACCELE ANGLE".
  
  Fig 2: CONSULT-II Screen Display - ENGINE SPEED
  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 ".
CHECK DTC
Perform "DTC Confirmation Procedure". Refer to "DTC CONFIRMATION PROCEDURE ".

OK or NG
1. OK: INSPECTION END
2. NG: GO TO 4.
CHECK TCM
1. Check TCM input/output signal.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
1. OK: INSPECTION END
2. NG: Repair or replace damaged parts.