Diagnosis Procedure

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

1. CHECK HARNESS BETWEEN BLUETOOTH® CONTROL UNIT AND MICROPHONE 
   1. Turn ignition switch OFF.
   2. Disconnect Bluetooth® control unit connector and microphone connector.
   3. Check continuity between Bluetooth® control unit harness connector B142 (A) and microphone harness connector R109 (B).

      A		B		Continuity
      Connector	Terminal	Connector	Terminal
      B142	7	R109	1	Yes
      	8		2
      	29		4

   4. Check continuity between Bluetooth® control unit harness connector B142 (A) and ground.
      Fig 1: Checking Harness Continuity

      Courtesy of NISSAN NORTH AMERICA, INC.

      A		-	Continuity
      Connector	Terminal
      B142	7	Ground	No
      	8
      	29

      Are the continuity test results as specified? 

      YES: GO TO 2.

      NO: Repair harness or connector.

2. CHECK MICROPHONE POWER SUPPLY 
   1. Connect Bluetooth® 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 2: Checking Microphone Power Supply

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is voltage reading approx. 5 volts? 

      YES: GO TO 3.

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

3. CHECK MICROPHONE SIGNAL 

   Check signal between Bluetooth® control unit harness connector B142 terminals 7 and 8 with CONSULT or and oscilloscope.

   Connector	(+)	(-)	Reference signal
   	Terminal	Terminal
   B142	7	8	While speaking into MIC

   Fig 3: Checking Microphone Signal

   Courtesy of NISSAN NORTH AMERICA, INC.

   Are voltage readings as specified? 

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

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