MICROPHONE: Diagnosis Procedure

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

1. CHECK POWER SUPPLY CIRCUIT (MICROPHONE SIDE) 
   1. Turn ignition switch ON.

      Check voltage between microphone harness connector R109 terminal 4 and ground.

      (+)		(-)	Value (Approx.)
      Connector	Terminal
      R109	4	Ground	5V

      Fig 1: Checking Power Supply Circuit (Microphone Side)

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is approximately 5V present? 

      YES: GO TO  4.

      NO: GO TO 2.

2. CHECK POWER SUPPLY CIRCUIT (CONTINUITY) 
   1. Turn ignition switch OFF.
   2. Disconnect microphone and Bluetooth control unit harness connectors.
   3. Check continuity between microphone harness connector R109 (A) terminal 4 and Bluetooth control unit harness connector B142 (B) terminal 29.

      A		B		Continuity
      Connector	Terminal	Connector	Terminal
      R109	4	B142	29	Yes

   4. Check continuity between microphone harness connector R109 (A) terminal 4 and ground.

      A		-	Continuity
      Connector	Terminal
      R109	4	Ground	No

      Fig 2: Checking Microphone Harness Continuity

      Courtesy of NISSAN NORTH AMERICA, INC.

      Are the continuity test results as specified? 

      YES: GO TO 3.

      NO: Repair harness or connector.

3. CHECK POWER SUPPLY CIRCUIT (BLUETOOTH CONTROL UNIT SIDE) 
   1. Connect Bluetooth control unit harness connector.
   2. Turn ignition switch to ACC.
   3. Check voltage between Bluetooth control unit harness connector B142 terminal 29 and ground.

      (+)		(-)	Value (Approx.)
      Connector	Terminal
      B142	29	Ground	5V

      Is approximately 5V present? 

      YES: Inspection End.

      Fig 3: Checking Power Supply Circuit (Bluetooth Control Unit Side)

      Courtesy of NISSAN NORTH AMERICA, INC.

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

4. CHECK GROUND CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect microphone harness connector R109 and Bluetooth control unit harness connector B142.
   3. Check continuity between microphone harness connector R109 (A) terminal 2 and Bluetooth control unit harness connector B142 (B) terminal 8.

      A		B		Continuity
      Connector	Terminal	Connector	Terminal
      R109	2	B142	8	Yes

      Fig 4: Checking Continuity Between Microphone Harness Connector And Bluetooth Control Unit Harness Connector

      Courtesy of NISSAN NORTH AMERICA, INC.

      Does continuity exist? 

      YES: Inspection End.

      NO: Repair harness or connector.