AV CONTROL UNIT: Diagnosis Procedure

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

1. CHECK FUSES

   Check that the following fuses of the AV control unit are not are not blown.

   Unit	Terminals	Signal name	Fuse No.
   AV control unit	19	Battery power	29
   	7	Ignition switch ACC or ON	4
   	104	Ignition switch ON or START	12

   Are the fuses OK? 

   YES: GO TO 2

   NO: If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.

2. POWER SUPPLY CIRCUIT CHECK
   1. Disconnect AV control unit connectors M131 and M135.
   2. Check voltage between the AV control unit connectors M131 and M135 and ground.

      (+)		(-)	OFF	ACC	ON
      Connector	Terminal
      M131	7	Ground	0V	Battery voltage	Battery voltage
      	19	Ground	Battery voltage	Battery voltage	Battery voltage
      M135	104	Ground	0V	0V	Battery voltage

   Fig 1: Checking Voltage Between AV Control Unit Connectors M131 And M135 Terminals And Ground

   Courtesy of NISSAN NORTH AMERICA, INC.

   Are the voltage results as specified? 

   YES: GO TO 3

   NO >>

   • Check connector housings for disconnected or loose terminals.
   • Repair harness or connector.
3. GROUND CIRCUIT CHECK
   1. Turn ignition switch OFF.
   2. Check continuity between AV control unit harness connectors M131, M133, M134, M135 and ground.

   (+)		(-)	Continuity
   Connector	Terminal
   M131	20	Ground	Yes
   M133	54
   M134	68
   M135	85

   Are the continuity results as specified? 

   YES: Inspection End.

   NO: Repair AV control unit ground.