Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Nissan 350Z. 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. Check voltage between ECM terminal 121 and ground with CONSULT-II or tester.
  - Voltage: Battery voltage
OK or NG
- OK: GO TO 3.
- NG: GO TO 2.
Fig 1: ECM Connector Terminal 121 & Ground Voltage Test
Courtesy of NISSAN MOTOR CO., U.S.A.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E108, M15
- Harness connectors M72, F102
- 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 .
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 .
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