Display Unit Bose Audio With Navigation

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 BATTERY POWER SUPPLY CIRCUIT
Check voltage between display unit harness connector and ground.





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





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





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