Diagnostic Procedure

1. Turn ignition switch OFF.
2. Check voltage between ECM terminal 104 and ground with CONSULT-II or tester.
   Fig 1: Checking Voltage Between ECM Terminal 104 & Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
   • Voltage: Battery voltage 

OK or NG

• OK: GO TO  4.
• 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

• OK: GO TO 3.
• NG: 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  7.
• 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 & Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
   VOLTAGE CONDITION TABLE
   
   

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

OK or NG

• OK: GO TO  7.
• NG: GO TO 5.

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

• OK: GO TO  7.
• NG: GO TO 6.

Check the following.

• Harness connectors E5, F14
• 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.