Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

1. CONNECTOR CHECK
   
   

   Check the AV control unit, BOSE speaker amp. and subwoofer connectors for the following:

   • Proper connection
   • Damage
   • Disconnected or looses terminals

   Is the inspection result normal?

   YES 

   GO TO STEP 2  .

   NO 

   Repair the terminal and connector.

2. CHECK SUBWOOFER SIGNAL CIRCUIT CONTINUITY
   
   
   1. Disconnect BOSE speaker amp. connector and subwoofer connector.
   2. Check continuity between BOSE speaker amp. connector and subwoofer connector.

      BOSE speaker amp.		Subwoofer		Continuity
      Connector	Terminal	Connector	Terminal
      B121	48	B73	1	Yes
      	53		2
      	44		3
      	43		4

   3. Check continuity between BOSE speaker amp. connector and ground.

      BOSE speaker amp.		Ground	Continuity
      Connector	Terminal
      B121	48	-	No
      	53
      	44
      	43

   Is the inspection result normal?

   YES 

   GO TO STEP 3. 

   NO 

   Repair or replace harness or connectors.

3. CHECK SUBWOOFER SIGNAL
   
   
   1. Connect BOSE speaker amp. connector and subwoofer connector.
   2. Turn ignition switch to ACC.
   3. Push AV control unit POWER switch.
   4. Check the signal between the terminals of BOSE speaker amp. connector.

      BOSE speaker amp. connector		Condition	Reference value
      (+)	(-)
      Terminal	Terminal
      53	48	Audio signal output	Courtesy of NISSAN NORTH AMERICA, INC.
      43	44

   Is the inspection result normal?

   YES 

   Replace subwoofer. Refer to REMOVAL AND INSTALLATION .

   NO 

   GO TO STEP 4. 

4. CHECK PRE-AMP SIGNAL CIRCUIT CONTINUITY
   
   
   1. Disconnect AV control unit connector M165 and BOSE speaker amp. connector B120.
   2. Check continuity between AV control unit connector M165 and BOSE speaker amp. connector B120.

      AV control unit		BOSE speaker amp.		Continuity
      Connector	Terminal	Connector	Terminal
      M165	124	B120	30	Yes
      	132		10

   3. Check continuity between AV control unit connector M165 and ground.

      AV control unit		Ground	Continuity
      Connector	Terminal
      M165	124	-	No
      	132

   Is the inspection result normal?

   YES 

   GO TO STEP 5. 

   NO 

   Repair or replace harness or connectors.

5. CHECK PRE-AMP SIGNAL
   
   
   1. Connect AV control unit connector M165 and BOSE speaker amp. connector B120.
   2. Turn ignition switch to ACC.
   3. Push AV control unit POWER switch.
   4. Check signal between the terminals of AV control unit connector M165.

      AV control unit connector M165		Condition	Reference value
      (+)	(-)
      Terminal	Terminal
      124	132	Audio signal output	Courtesy of NISSAN NORTH AMERICA, INC.

   Is the inspection result normal?

   YES 

   Replace BOSE speaker amp. Refer to REMOVAL AND INSTALLATION .

   NO 

   Replace AV control unit. Refer to REMOVAL AND INSTALLATION .