Diagnosis Procedure

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

1. CONNECTOR CHECK 

   Check the audio 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 audio unit connector M43 and suspect front tweeter connector.
   2. Check continuity between audio unit harness connector M43 (A) and suspect front tweeter harness connector (B).

      A		B		Continuity
      Connector	Terminal	Connector	Terminal
      M43	2	M109	1	Yes
      	3		2
      	11	M111	1
      	12		2

   3. Check continuity between audio unit harness connector M43 (A) and ground.

      A		-	Continuity
      Connector	Terminal
      M43	2	Ground	No
      	3
      	11
      	12

      Fig 1: Checking Continuity Between Audio Unit Connector M43 And Suspect Front Tweeter Connector

      Courtesy of NISSAN NORTH AMERICA, INC.

      Are the continuity results as specified? 

      YES: GO TO 3

      NO: Repair harness or connector.

3. FRONT TWEETER SIGNAL CHECK 
   1. Connect audio unit connector M43 and front tweeter connector.
   2. Turn ignition switch to ACC.
   3. Push audio unit "POWER" switch.
   4. Check the signal between audio unit harness connector M43 terminals with CONSULT or oscilloscope.

      (+)		(-)	Condition	Reference signal
      Connector	Terminal	Terminal
      M43	2	3	Receive audio signal
      	11	12

      Is the audio signal voltage as specified? 

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

      NO: Replace audio unit. Refer to "REMOVAL AND INSTALLATION ".

      Fig 2: Checking Signal Between Audio Unit Connector M43 Terminals

      Courtesy of NISSAN NORTH AMERICA, INC.