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. Bose Audio.

3. CHECK STEERING SWITCH

Check steering switch. .
Is the inspection result normal?
YES- INSPECTION END
NO- Replace steering switch. Without Navigation.


Component Inspection






Measure the resistance between the steering switch connector.
Standard