AV Control Unit Bose Audio With Navigation

POWER SUPPLY AND GROUND CIRCUIT - AV CONTROL 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 BATTERY POWER SUPPLY CIRCUIT
Check voltage between AV control unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - Check harness between AV control unit and fuse.
3.CHECK ACC POWER SUPPLY CIRCUIT
Check voltage between AV control unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - Check harness between AV control unit and BCM.
4.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect AV control unit connectors.
3. Check continuity between AV control unit harness connectors and ground.





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