Bose Audio Without Navigation

STEERING SWITCH (COUPE)

Description

When one of the steering wheel audio control switches is pushed, the resistance in the steering switch circuit changes depending on which button is pushed.


Diagnosis Procedure

Regarding Wiring Diagram information, Bose Audio.

1. CHECK HARNESS






1.Turn ignition switch OFF.
2.Disconnect Bluetooth control unit connector B55 and spiral cable connector M30.
3.Check continuity between Bluetooth control unit connector B55
(A) terminals and spiral cable connector M30 (B) terminals.





4.Check continuity between Bluetooth control unit B55 (A) and ground.





Are the continuity test results as specified?
YES- GO TO 2
NO- Repair harness.

2. CHECK HARNESS






1.Disconnect audio unit connector.
2.Check continuity between audio unit connector M132 (A) terminals and Bluetooth control unit connector B55 (B) terminals.





Are the continuity test results as specified?
YES- GO TO 3
NO- Repair harness.

3. SPIRAL CABLE CHECK






1.Disconnect spiral cable connector M88.
2.Check continuity between spiral cable harness connector M30 and M88.





Are the continuity test results as specified?
YES- GO TO 4
NO- Replace spiral cable. Service and Repair.

4. CHECK STEERING SWITCH

Check steering switch. Refer to "Component Inspection".
Does the steering switch pass inspection?
YES- Replace Bluetooth control unit. Bose Audio
NO- Replace steering switch. Bose Audio Without Navigation.


Component Inspection

Measure the resistance between the steering switch connector terminals 14 to 17 and 15 to 17.