Base Audio

STEERING SWITCH

Description

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


Diagnosis Procedure

Regarding Wiring Diagram information, Base Audio.

1. CHECK STEERING SWITCH RESISTANCE






1.Disconnect steering switch connector M88.
2.Check resistance between steering switch connector terminals.





Do the steering switches check OK?
YES- GO TO 2.
NO- Replace steering switch. Base Audio.

2. CHECK HARNESS BETWEEN SPIRAL CABLE AND BLUETOOTH CONTROL UNIT

1.Turn ignition switch OFF.
2.Disconnect Bluetooth control unit connector B126 and spiral cable connector M30.
3.Check continuity between Bluetooth control unit harness connector B126 and spiral cable harness connector M30.





4.Check continuity between Bluetooth control unit connector B126 and ground.





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

3. CHECK HARNESS BETWEEN SPIRAL CABLE AND AUDIO UNIT

1.Disconnect audio unit connector M147.
2.Check continuity between audio unit harness connector M147 and spiral cable harness connector M30.





3.Check continuity between audio unit connector M147 and ground.





Are the continuity results as specified?
YES- GO TO 4.
NO- Repair harness.

4. SPIRAL CABLE CHECK






1.Check continuity between spiral cable harness connector M30
(A) and M88 (B).





Does the spiral cable check OK?
YES- GO TO 5.
NO- Replace spiral cable. Service and Repair.

5. CHECK HARNESS BETWEEN BLUETOOTH CONTROL UNIT AND AUDIO UNIT

1.Disconnect audio unit connector M133.
2.Check continuity between Bluetooth control unit harness connector B126 and audio unit harness connector M133.





3.Check continuity between Bluetooth control unit connector B126 and ground.





Are the continuity results as specified?
YES- GO TO 6.
NO- Repair harness.

6. CHECK AUDIO UNIT VOLTAGE

1.Connect audio unit harness connector M133 and Bluetooth control unit harness connector B126.
2.Turn ignition switch ON.
3.Check voltage between audio unit harness connector M133 terminals.





Are the continuity results as specified?
YES- Replace Bluetooth control unit. Base Audio.
NO- Replace audio unit. Base Audio.