Diagnostic Procedure

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 
   Fig 1: Checking Voltage Between ECM Connector Terminal 121 And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

• OK: GO TO  3.
• NG: GO TO 2.

Check the following.

• 20A fuse
• IPDM E/R harness connector E121
• Harness for open or short between ECM and IPDM E/R
  • Repair open circuit in harness or connectors.

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

OK or NG 

• OK: GO TO 4.
• NG: Repair or replace harness or connectors.

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 

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