Diagnosis Procedure

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

1. CONNECTOR CHECK 

   Check the AV control unit and speaker connectors for the following:

   • Proper connection
   • Damage
   • Disconnected or loose terminals

     Is the inspection result normal? 

     YES: GO TO 2.

     NO: Repair the terminal and connector.

2. HARNESS CHECK 
   1. Disconnect AV control unit connector M42 and suspect front tweeter connector.
   2. Check continuity between AV control unit harness connector M42 (A) and suspect front tweeter harness connector (B).

      A		B		Continuity
      Connector	Terminal	Connector	Terminal
      M42	2	M109	1	Yes
      	3		2
      	11	M111	1
      	12		2

   3. Check continuity between AV control unit harness connector M42 (A) and ground.

      A		-	Continuity
      Connector	Terminal
      M42	2	Ground	No
      	3
      	11
      	12

      Fig 1: Checking Harness Continuity

      Courtesy of NISSAN NORTH AMERICA, INC.

      Are the continuity results as specified? 

      YES: GO TO 3.

      NO:

      • Check connector housings for disconnected or loose terminals.
      • Repair harness or connector.
3. FRONT TWEETER SIGNAL CHECK 
   1. Connect AV control unit connector M42 and front tweeter connector.
   2. Turn ignition switch to ACC.
   3. Push "POWER" switch.
   4. Check the signal between AV control unit harness connector M42 terminals with CONSULT or oscilloscope.

      (+)		(-)	Condition	Reference signal
      Connector	Terminal	Terminal
      M42	2	3	Receive audio signal
      	11	12

      Fig 2: Checking Front Tweeter Signal Using Oscilloscope

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the audio signal voltage as specified? 

      YES: Replace the suspect front tweeter. Refer to "REMOVAL AND INSTALLATION ".

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