Nissan Altima (L32) 2007-2012 Service Manual: Bose speaker AMP

Diagnosis Procedure

1.CHECK FUSE

Check for blown fuses.

Are the fuses OK? YES >> GO TO 2

NO >> Be sure to eliminate cause of malfunction before installing new fuse.

2.CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BOSE speaker amp connector.

3. Check voltage between BOSE speaker amp harness connector and ground.

Is battery voltage present? YES >> GO TO 3

NO >> Check harness between BOSE speaker amp and fuse.

3.CHECK GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BOSE speaker amp connector.

3. Check continuity between BOSE speaker amp harness connector and ground.

Does continuity exist? YES >> INSPECTION END.

NO >> Repair harness or connector.