Bose Audio

POWER SUPPLY AND GROUND CIRCUIT

DISPLAY UNIT : Diagnosis Procedure


1. CHECK FUSE

Check for blown fuses.





Is the inspection result normal?
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 ACC.
2.Check voltage between display unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- Be sure to eliminate cause of malfunction before installing new fuse.

3. CHECK GROUND CIRCUIT

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





Is the inspection result normal?
YES- INSPECTION END
NO- Repair harness or connector.