Diagnostic Procedure

1. Turn ignition switch OFF.
2. Check voltage between ECM terminal 104 and ground with CONSULT-II or tester.

   Voltage: Battery voltage 

   Fig 1: Checking Throttle Control Motor Relay Power Supply Circuit-I

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

OK or NG 

1. OK: GO TO  5 .
2. NG: GO TO 2.

1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E121.
3. Check continuity between ECM terminal 104 and IPDM E/R terminal 47. Refer to WIRING DIAGRAM  .

   Continuity should exist. 

4. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO  4 .
2. NG: GO TO 3.

Check the following.

• Harness for open or short between ECM and IPDM E/R
  1. Repair open circuit or short to ground or short to power in harness or connectors.

1. Disconnect 15A fuse.
2. Check 15A fuse for blown.

OK or NG 

1. OK: GO TO  8 .
2. NG: Replace 15A fuse.

1. Check voltage between ECM terminal 3 and ground under the following conditions with CONSULT-II or tester.
   Fig 2: Checking Voltage Between ECM Terminal 3 And Ground

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

OK or NG 

1. OK: GO TO  8 .
2. NG: GO TO 6.
   Fig 3: Identifying ECM Connector

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

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect IPDM E/R harness connector E124.
4. Check continuity between ECM terminal 3 and IPDM E/R terminal 42. Refer to WIRING DIAGRAM  .

   Continuity should exist. 

5. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO  8 .
2. NG: GO TO 7.

Check the following.

• Harness connectors E5, F14
• Harness for open or short between ECM and IPDM E/R
  1. Repair open circuit or short to ground or short to power in harness or connectors.

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT  .

OK or NG 

1. OK: Replace IPDM E/R. Refer to POWER DISTRIBUTION .
2. NG: Repair or replace harness or connectors.