Diagnostic Procedure

CHECK DTC WITH ECM
With CONSULT-II
1. Turn ignition switch to "ON" position. (Do not start engine.)
2. Select "SELF-DIAG RESULTS" mode for "ENGINE" with CONSULT-II. Refer to "CONSULT-II FUNCTIONS".
  
  Fig 1: Checking DTC With ECM With CONSULT-II (DTC P0725)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK >> GO TO 2.
2. NG >> Check the DTC detected item, go to "CONSULT-II FUNCTIONS".
  - If CAN communication line is detected, go to "DTC U1000 CAN COMMUNICATION LINE ".
CHECK DTC WITH TCM
With CONSULT-II
1. Start engine.
2. Select "MAIN 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 2: Checking DTC With TCM With CONSULT-II (DTC P0725)
  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.
PERFORM TCM INSPECTION
1. Perform TCM input/output signal inspection.
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.