Steering Switch Signal GND Circuit (TEL Adapter Unit To Audio Unit)

STEERING SWITCH SIGNAL GND CIRCUIT (TEL ADAPTER UNIT TO AUDIO UNIT)





Description
- Transmits the steering switch signal to audio unit.
- Transmits the steering switch signal to audio unit through TEL adapter unit.




Diagnosis Procedure
1.CHECK STEERING SWITCH SIGNAL GND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect audio unit connector and TEL adapter unit connector.
3. Check continuity between audio unit harness connector and TEL adapter unit harness connector.





Is the inspection result normal?
YES - GO TO 2.
NO - Repair harness or connector.
2.CHECK GROUND CIRCUIT
1. Connect audio unit connector.
2. Check continuity between audio unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - Replace audio unit. Removal And Installation Bose Audio Without Navigation.
3.CHECK STEERING SWITCH
Check steering switch. SEE Component Inspection.
Is the inspection result normal?
YES - INSPECTION END
NO - Replace steering switch. Removal And Installation Bose Audio Without Navigation.




Component Inspection





Measure the resistance between the steering switch connector.