Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

CHECK ECM POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check voltage between ECM terminal 121 and ground with CONSULT-II or tester.
  
  Fig 1: Checking Voltage Between ECM Terminal 121 & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  - Voltage: Battery voltage
OK or NG
- OK: GO TO 3.
- NG: GO TO 2.
DETECT MALFUNCTIONING PART
Check the following.
- IPDM E/R harness connector E124
- 15A fuse
- Harness for open or short between ECM and battery
- : Repair or replace harness or connectors.
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

OK or NG
- OK: GO TO 4.
- NG: Repair or replace harness or connectors.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-II
1. Turn ignition switch ON.
2. Select "SELF DIAG RESULTS" mode with CONSULT-II.
3. Touch "ERASE".
4. Perform DTC Confirmation Procedure.
  See DTC P1065 ECM POWER SUPPLY
5. Is the 1st trip DTC P1065 displayed again?
With GST
1. Turn ignition switch ON.
2. Select "Service $04" with GST.
3. Touch "ERASE".
4. Perform DTC Confirmation Procedure.
  See DTC P1065 ECM POWER SUPPLY
5. Is the 1st trip DTC P1065 displayed again?
Yes or No
- Yes: GO TO 5.
- No: INSPECTION END
REPLACE ECM
1. Replace ECM.
2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to "ECM RE-COMMUNICATING FUNCTION ".
3. Perform "VIN REGISTRATION ".
4. Perform "ACCELERATOR PEDAL RELEASED POSITION LEARNING ".
5. Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".
6. Perform "IDLE AIR VOLUME LEARNING ".
- : INSPECTION END