BOSE SPEAKER AMP: Diagnosis Procedure

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

1. CHECK FUSE 

   Check that the BOSE speaker amp. fuse is not blown.

   Unit	Terminal	Signal name	Fuse No.
   BOSE speaker amp.	11	Battery power	31

   Are the fuses 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 BOSE speaker amp. connector.
   3. Check voltage between BOSE speaker amp. harness connector M112 terminal 11 and ground.

      (+)		(-)	Voltage (approx.)
      Connector	Terminal
      M112	11	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 BOSE speaker amp. and fuse.

3. CHECK GROUND CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect BOSE speaker amp. connector.
   3. Check continuity between BOSE speaker amp. harness connector M112 terminal 12 and ground.

      (+)		(-)	Continuity
      Connector	Terminal
      M112	12	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.