Bose Audio Without Navigation

STEERING SWITCH SIGNAL B CIRCUIT





Description
Transmits the steering switch signal to audio unit.




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





4. Check continuity between audio unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 2.
NO - Repair harness or connector.
2.CHECK SPIRAL CABLE
Check spiral cable.
Is the inspection result normal?
YES - GO TO 3.
NO - Replace spiral cable. Removal And Installation.
3.CHECK AUDIO UNIT VOLTAGE
1. Connect audio unit connector and spiral cable connector.
2. Turn ignition switch ON.
3. Check voltage between audio unit harness connector.





Is the inspection result normal?
YES - GO TO 4.
NO - Replace audio unit. Removal And Installation Bose Audio Without Navigation.
4.CHECK STEERING SWITCH
1. Turn ignition switch OFF.
2. 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.