Diagnosis Procedure

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

1. 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).
      CONTINUITY CHART
      
      

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

      Fig 1: Checking Continuity Between AV Control Unit Harness Connector M42 And Suspect Front Tweeter Harness Connector

      Courtesy of NISSAN MOTOR CO., U.S.A.
   3. Check continuity between AV control unit harness connector M42 (A) and ground.
      CONTINUITY CHART
      
      

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

      Are the continuity results as specified? 

      YES: GO TO  2.

      NO:

      • Check connector housings for disconnected or loose terminals.
      • Repair harness or connector.
2. 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-III or oscilloscope.
      SIGNAL REFERENCE
      
      

      (+)		(-)	Condition	Reference signal
      Connector	Terminal	Terminal
      M42	2	3	Receive audio signal	Courtesy of NISSAN MOTOR CO., U.S.A.
      	11	12

      Fig 2: Checking Signal Between AV Control Unit Harness Connector M42 Terminals

      Courtesy of NISSAN MOTOR CO., U.S.A.

      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 ".