DTC 31 Power Supply Cir, DTC 34 Power Supply Cir 2

1. Turn ignition switch OFF.
2. Disconnect ICC unit connector, and connect it securely again.
3. Erase DTC and perform ICC running test. Then perform self-diagnosis of ICC system again.

Is malfunction indicated? 

YES : GO TO 2.

NO : Poor connector connection

1. Check connector. (Check connector housing for disconnected, loose, bent, and collapsed terminals. If any malfunction is detected, repair applicable part.)
2. Erase DTC and perform ICC running test. Then perform self-diagnosis of ICC system again.

1. Turn ignition switch ON.
2. Check voltage between ICC unit harness connector and ground.

OK or NG 

OK : GO TO 3.

NG :

1. Repair ICC unit power supply harness.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
   Fig 1: Identifying Voltage Between ICC Unit Harness Connector And Ground

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

1. Turn ignition switch OFF.
2. Disconnect ICC unit connector.
3. Check continuity between ICC unit harness connector and ground.

Fig 2: Identifying Continuity Between ICC Unit Harness Connector And Ground

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

OK or NG 

OK :

1. Replace ICC unit.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.

NG :

1. Repair ICC unit ground harness.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.