Diagnostic Procedure

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

OK or NG 

• OK: GO TO  5.
• NG: GO TO  2.

Fig 1: Checking Voltage Between ECM Terminal & Ground

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

1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E9.
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 

• OK: GO TO  4.
• NG: GO TO  3.

Check the following.

• Harness connectors E110, M7
• Harness for open or short between ECM and IPDM E/R

• 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 

• OK: GO TO  8.
• NG: Replace 15A fuse.

1. Check voltage between ECM terminal 3 and ground under the following conditions with CONSULT-II or tester.
   IGNITION SWITCH REFERENCE
   
   

   Ignition switch	Voltage
   OFF	Approximately 0V
   ON	Battery voltage (11 - 14V)

   Fig 2: Checking Voltage Between ECM Terminal & Ground

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

OK or NG 

• OK: GO TO  8.
• NG: GO TO  6.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect IPDM E/R harness connector E8.
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 

• OK: GO TO  8.
• NG: GO TO  7.

Check the following.

• Harness connectors E19, F3
• Harness for open or short between ECM and IPDM E/R

• 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 

• OK: Replace IPDM E/R. Refer to IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) .
• NG: Repair or replace harness or connectors.