Diagnosis Procedure

STEERING SWITCH (SEDAN)


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.





STEERING SWITCH (SEDAN)


Diagnosis Procedure

Regarding Wiring Diagram information, refer to Without Navigation.
1.CHECK HARNESS





1. Turn ignition switch OFF.
2. Disconnect Bluetooth control unit connector B126 and spiral cable connector M30.
3. Check continuity between Bluetooth control unit connector B126
(A) terminals and spiral cable connector M30 (B) terminals.






4. Check continuity between Bluetooth control unit B126 (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 M44 (A) terminals and Bluetooth control unit connector B126 (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. Refer to 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. Refer to Removal And Installation - Sedan
NO - Replace steering switch. Refer to Without Navigation.