Diagnostic Procedure

WARNING: This page is about a different car, the 2007 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 (ENGINE) ".
OK or NG

OK: GO TO 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 Function Screen Display - Select System
  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".
OK or NG

OK: GO TO 3.

NG: Check the ignition signal circuit.
- Refer to "IGNITION SIGNAL ".
  
  Fig 2: CONSULT-II Display DATA MONITOR Screen
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK DTC
Perform "DTC Confirmation Procedure". Refer to "DTC CONFIRMATION PROCEDURE ".

OK or NG

OK: INSPECTION END

NG: GO TO 4.
CHECK TCM
1. Check TCM input/output signal. Refer to "TCM INPUT/OUTPUT SIGNAL REFERENCE VALUES ".
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG

OK: INSPECTION END

NG: Repair or replace damaged parts.