Diagnosis Procedure

STEERING SWITCH SIGNAL A CIRCUIT:_:WITHOUT HANDS-FREE PHONE SYSTEM





Diagnosis Procedure
1.CHECK STEERING SWITCH SIGNAL A CIRCUIT
1. Disconnect AV control unit connector and spiral cable connector.
2. Check continuity between AV control unit harness connector and spiral cable harness connector.





3. Check continuity between AV control 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.
3.CHECK AV CONTROL UNIT VOLTAGE
1. Connect AV control unit connector and spiral cable connector.
2. Turn ignition switch ON.
3. Check voltage between AV control unit harness connector.





Is the inspection result normal?
YES - GO TO 4.
NO - Replace AV control unit. Exploded View Base 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. Exploded View.




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