Nissan Maxima Service and Repair Manual: Power supply and ground circuit

POWER SUPPLY AND GROUND CIRCUIT AUDIO UNIT

AUDIO UNIT : Diagnosis Procedure

1.CHECK FUSES

Check that the following fuses are not blown.

2.POWER SUPPLY CIRCUIT CHECK

1. Disconnect audio unit connector M133.
2. Check voltage between the audio unit connector M133 and ground.

3.GROUND CIRCUIT CHECK

Inspect audio unit case ground.

SUBWOOFER AMP

SUBWOOFER AMP : Diagnosis Procedure

1.CHECK FUSE

Check for blown fuses.

2.CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.
2. Disconnect subwoofer amp connector.
3. Check voltage between subwoofer amp harness connector and ground.

3.CHECK GROUND CIRCUIT

Check continuity between subwoofer amp harness connector and ground.

DISPLAY UNIT

DISPLAY UNIT : Diagnosis Procedure

1.CHECK FUSES

Check that the following fuses are not blown.

2.POWER SUPPLY CIRCUIT CHECK

1. Turn ignition switch OFF.
2. Disconnect display unit connector.
3. Check voltage between the display unit and ground.

3.GROUND CIRCUIT CHECK

1. Turn ignition switch OFF.
2. Check continuity between display unit harness connector and ground.

BLUETOOTH CONTROL UNIT

BLUETOOTH CONTROL UNIT : Diagnosis Procedure

1.CHECK FUSE

Check that the following fuses of the Bluetooth control unit are not blown.

2.CHECK POWER SUPPLY CIRCUIT

Check voltage between Bluetooth control unit harness connector and ground.

3.CHECK GROUND CIRCUIT

1. Turn ignition switch OFF.
2. Disconnect Bluetooth control unit connector B126.
3. Check continuity between Bluetooth control unit harness connector and ground.

MICROPHONE

MICROPHONE : Diagnosis Procedure

1.CHECK POWER SUPPLY CIRCUIT (MICROPHONE SIDE)

Check voltage between microphone harness connector and ground.

2.CHECK POWER SUPPLY CIRCUIT (CONTINUITY)

 

1. Turn ignition switch OFF.
2. Disconnect Bluetooth control unit and microphone connectors.
3. Check continuity between microphone harness connector R7 (A) terminal 4 and Bluetooth control unit harness connector B126 (B) terminal 29. 

 

4. Check continuity between microphone harness connector R7 (A) terminal 4 and ground. 

 

3.CHECK GROUND CIRCUIT

 

1. Turn ignition switch OFF.
2. Disconnect Bluetooth control unit and microphone connectors.
3. Check continuity between Bluetooth control unit harness connector B126 (A) terminal 8 and microphone harness connector R7 (B) terminal 2.