Diagnosis Procedure

1. Disconnect AV control unit connector and spiral cable connector.
2. Check continuity between AV control unit harness connector and spiral cable harness connector.
   TERMINALS CONTINUITY SPECIFICATION
   
   

   AV control unit		Spiral cable		Continuity
   Connector	Terminal	Connector	Terminal
   M81	16	M36	31	Existed

3. Check continuity between AV control unit harness connector and ground.
   TERMINALS CONTINUITY SPECIFICATION
   
   

   AV control unit		Ground	Continuity
   Connector	Terminal
   M81	16		Not existed

Is the inspection result normal? 

YES: GO TO  2.

NO: Repair harness or connector.

Check spiral cable.

Is the inspection result normal? 

YES: GO TO  3.

NO: Replace spiral cable.

1. Connect AV control unit connector and spiral cable connector.
2. Turn ignition switch ON.
3. Check voltage between AV control unit harness connector.
   TERMINALS REFERENCE
   
   

   (+)		(-)		Reference value (Approx.)
   AV control unit		AV control unit
   Connector	Terminal	Connector	Terminal
   M81	16	M81	15	3.3 V

Is the inspection result normal? 

YES: GO TO  4.

NO: Replace AV control unit.

1. Turn ignition switch OFF.
2. Check steering switch. Refer to COMPONENT INSPECTION  .

Is the inspection result normal? 

YES: INSPECTION END

NO: Replace steering switch.