Diagnosis Procedure
Regarding Wiring Diagram information, refer to AV "Wiring Diagram".
1.CHECK STEERING WHEEL AUDIO CONTROL SWITCH RESISTANCE
1. Turn ignition switch OFF.
2. Disconnect combination switch connector M88.
3. Check resistance between the terminals of combination switch connector M88.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace steering switches. Refer to AV "Removal and Installation".
2.CHECK COMBINATION SWITCH
Check continuity between combination switch connectors M88 and M30.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace spiral cable. Refer to SR "Removal and Installation".
3.CHECK HARNESS BETWEEN COMBINATION SWITCH AND AV CONTROL UNIT
1. Disconnect AV control unit connector M30.
2. Check continuity between combination switch connector M30 and AV control unit connector M70.
3. Check continuity between combination switch connector M30 and ground.
Is the inspection result normal?
YES >> Replace AV control unit. Refer to AV "Removal and Installation".
NO >> Repair or replace harness or connectors.