Diagnosis Procedure
- CHECK STEERING SWITCH SIGNAL A (AUDIO UNIT TO TEL ADAPTER UNIT) CIRCUIT
- Turn ignition switch OFF.
- Disconnect audio unit connector and TEL adapter unit connector.
- Check continuity between audio unit harness connector and TEL adapter unit harness connector.CONTINUITY SPECIFICATION
Audio unit TEL adapter unit Continuity Connector Terminal Connector Terminal M49 51 B54 12 Existed - Check continuity between audio unit harness connector and ground.CONTINUITY SPECIFICATION
Audio unit Ground Continuity Connector Terminal M49 51 Not existed
Is the inspection result normal?
YES: GO TO 2.
NO: Repair harness or connector.
- CHECK AUDIO UNIT VOLTAGE
- Connect audio unit connector and TEL adapter unit connector.
- Turn ignition switch ON.
- Check voltage between audio unit harness connector.VOLTAGE SPECIFICATION
(+) (-) Voltage (Approx.) Audio unit Audio unit Connector Terminal Connector Terminal M49 51 M49 53 4.8 V
Is the inspection result normal?
YES: Replace TEL adapter unit.
NO: Replace audio unit.