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 M131 and suspect speaker connector.
   2. Check continuity between AV control unit harness connector M131 (A) terminal and suspect speaker harness connector (B) terminal.

      A		B		Continuity
      Connector	Terminal	Connector	Terminal
      M131	2	D12	1	Yes
      	3		2
      	11	D112	1
      	12		2

   3. Check continuity between AV control unit harness connector M131 (A) terminal and ground.

      A		-	Continuity
      Connector	Terminal
      M131	2	Ground	No
      	3
      	11
      	12

   Fig 1: Checking Continuity Between AV Control Unit Connector M131 (A) Terminals And Suspect Speaker Connector (B) Terminals

   Courtesy of NISSAN NORTH AMERICA, INC.

   Are continuity results as specified? 

   YES: GO TO 3

   NO: Repair harness or connector.

3. FRONT SPEAKER SIGNAL CHECK
   1. Connect AV control unit connector M131 and front speaker connector.
   2. Turn ignition switch to ACC.
   3. Push "POWER" switch.
   4. Check the signal between AV control unit harness connector M131 terminals with CONSULT or oscilloscope.

      (+)		(-)	Condition	Reference signal
      Connector	Terminal	Terminal
      M131	2	3	Receive audio signal
      	11	12

   Fig 2: Checking Signal Between AV Control Unit Connector M131 Terminals Using Oscilloscope

   Courtesy of NISSAN NORTH AMERICA, INC.

   Is the audio signal voltage as specified? 

   YES: Replace speaker. Refer to "REMOVAL AND INSTALLATION ".

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