Diagnosis Procedure

1. Turn ignition switch OFF.
2. Disconnect audio unit connector and TEL adapter unit connector.
3. Check continuity between audio unit harness connector and TEL adapter unit harness connector.
   CONTINUITY REFERENCE CHART
   
   

   Audio unit		TEL adapter unit		Continuity
   Connector	Terminal	Connector	Terminal
   M82	30	B237	14	Existed

4. Connect audio unit connector.

   Is the inspection result normal? 

   YES: GO TO 2.

   NO: Repair harness or connector.

1. Connect audio unit connector.
2. Check continuity between audio unit harness connector and ground.
   CONTINUITY REFERENCE CHART
   
   

   Audio unit		Ground	Continuity
   Connector	Terminal
   M82	30		Existed

   Is the inspection result normal? 

   YES: GO TO 3.

   NO: Replace audio unit.

Check steering switch. Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: INSPECTION END

NO: Replace steering switch.