Diagnosis Procedure

Diagnosis Procedure

1. CHECK HARNESS BETWEEN AV CONTROL UNIT AND MICROPHONE

   1. 1. Ignition switch OFF.

      2. Disconnect AV control unit connector and microphone connector.

      3. Check continuity between AV control unit connector and microphone connector.

         AV control unit		Microphone		Continuity
         Connector	Terminal	Connector	Terminal
         M93	34	R17	4	Yes
         	43		5
         	53		1
         	54		2

      4. Check continuity between AV control unit connector and ground.

         AV control unit		—	Continuity
         Connector	Terminal
         M93	34	Ground	No
         	43
         	53

   Is the inspection result normal?

   YES >>

   GO TO 2.

   NO >>

   Repair harness or connectors.

2. CHECK MICROPHONE POWER SUPPLY

   1. 1. Connect AV control unit connector and microphone connector.

      2. Ignition switch ON.

      3. Check voltage between microphone connector and ground.

         Microphone		(-)	Voltage (Approx.)
         (+)
         Connector	Terminal
         R17	4	Ground	5 V

   Is the inspection result normal?

   YES >>

   GO TO 3.

   NO >>

   Replace AV control unit. Refer to Removal and Installation.

3. CHECK MICROPHONE SIGNAL

   1. Check signal between terminals of AV control unit connector.

      AV control unit			Condition	Reference value
      Connector	(+)	(-)
      	Terminal	Terminal
      M93	53	54	Speak into microphone.

   Is the inspection result normal?

   YES >>

   Replace AV control unit. Refer to Removal and Installation.

   NO >>

   Replace microphone. Refer to Removal and Installation.