Diagnosis Procedure

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 TEL adapter unit through audio unit.




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





4. Connect audio unit 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.
3.CHECK STEERING SWITCH
Check steering switch. Refer to Component Inspection.
Is the inspection result normal?
YES - INSPECTION END
NO - Replace steering switch.