Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. CHECK HARNESS BETWEEN AV CONTROL UNIT AND MICROPHONE 
   1. Turn ignition switch OFF.
   2. Disconnect AV control unit connector and microphone connector.
   3. Check continuity between AV control unit harness connector M165 and microphone harness connector R109.

      AV control unit		Microphone		Continuity
      Connector	Terminal	Connector	Terminal
      M165	59	R109	1	Yes
      	75		2
      	60		4

   4. Check continuity between AV control unit harness connector M165 and ground.

      AV control unit		-	Continuity
      Connector	Terminal
      M165	59	Ground	No
      	60
      	75

      Are the continuity test results as specified? 

      YES: GO TO 2.

      NO: Repair harness or connector.

2. CHECK MICROPHONE POWER SUPPLY 
   1. Connect AV control unit connector and microphone connector.
   2. Turn ignition switch ON.
   3. Check voltage between microphone harness connector R109 terminal 4 and ground.

      (+)		(-)	Voltage (approx)
      Connector	Terminal
      R109	4	Ground	5V

      Fig 1: Checking Microphone Power Supply Voltage

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is voltage reading approx. 5 volts? 

      YES: GO TO 3.

      NO: Replace AV control unit. Refer to "REMOVAL AND INSTALLATION ".

3. CHECK MICROPHONE SIGNAL 

   Check signal between AV control unit harness connector M165 terminals 75 and 59.

   Connector	(+)	(-)	Reference signal
   	Terminal	Terminal
   M165	75	59	While speaking into MIC

   Are voltage readings as specified? 

   YES: Replace AV control unit. Refer to "REMOVAL AND INSTALLATION ".

   NO: Replace microphone. Refer to "REMOVAL AND INSTALLATION ".