SUBWOOFER: Diagnosis Procedure

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

1. CHECK FUSE 

   Check that the subwoofer fuse is not blown.

   Unit	Terminal	Signal name	Fuse No.
   Subwoofer	6	Battery power	17

   Is the fuse OK? 

   YES: GO TO 2.

   NO: Be sure to eliminate cause of malfunction before installing new fuse.

2. CHECK POWER SUPPLY CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect subwoofer connector.
   3. Check voltage between subwoofer harness connector B72 terminal 6 and ground.

      (+)		(-)	Voltage (approx.)
      Connector	Terminal
      B72	6	Ground	Battery voltage

      Fig 1: Checking Power Supply Circuit Voltage

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is battery voltage present? 

      YES: GO TO 3.

      NO: Check harness between subwoofer and fuse.

3. CHECK GROUND CIRCUIT 
   1. Turn ignition switch OFF.
   2. Check continuity between subwoofer harness connector B72 terminal 5 and ground.

      (+)		(-)	Continuity
      Connector	Terminal
      B72	5	Ground	Yes

      Fig 2: Checking Ground Circuit Continuity

      Courtesy of NISSAN NORTH AMERICA, INC.

      Does continuity exist? 

      YES: Inspection End.

      NO: Repair harness or connector.