Diagnostic Procedure

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.
  Voltage: Battery voltage
OK or NG

OK: GO TO 3.

NG: GO TO 2.

Fig 1: Checking Voltage Between ECM Terminal 121 & Ground With CONSULT-II
Courtesy of NISSAN MOTOR CO., U.S.A.
DETECT MALFUNCTIONING PART
Check the following.
- IPDM E/R connector E121
- 20A 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 CONFIRMATION PROCEDURE .
5. Is the 1st trip DTC P1065 displayed again?
WITH GST
1. Turn ignition switch ON.
2. Select MODE 4 with GST.
3. Touch "ERASE".
4. Perform DTC Confirmation Procedure.
  See DTC CONFIRMATION PROCEDURE .
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 ACCELERATOR PEDAL RELEASED POSITION LEARNING .
4. Perform THROTTLE VALVE CLOSED POSITION LEARNING .
5. Perform IDLE AIR VOLUME LEARNING .
  : INSPECTION END