Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

1. CONNECTOR CHECK
   
   

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

   • Proper connection
   • Damage
   • Disconnected or loose terminals

   Is the inspection result normal?

   YES 

   GO TO STEP 2  .

   NO 

   Repair the terminals or connectors.

2. CHECK FRONT TWEETER SIGNAL CIRCUIT CONTINUITY (BOSE SPEAKER AMP.)
   
   
   1. Disconnect Bose speaker amp. connectors and suspect front tweeter connector.
   2. Check continuity between Bose speaker amp. connectors and suspect front tweeter connector.

      Bose speaker amp.		Front tweeter		Continuity
      Connector	Terminal	Connector	Terminal
      B137	6	M80 (LH)	1	Yes
      	7		2
      B138	37	M23 (RH)	1
      	27		2

   3. Check continuity between Bose speaker amp. connectors and ground.

      Bose speaker amp.		Ground	Continuity
      Connector	Terminal
      B137	6	-	No
      	7
      B138	37
      	27

   Is the inspection result normal?

   YES 

   GO TO STEP 3  .

   NO 

   Repair or replace harness or connectors.

3. CHECK FRONT TWEETER SIGNAL (BOSE SPEAKER AMP.)
   
   
   1. Connect Bose speaker amp. connectors and suspect front tweeter connector.
   2. Turn ignition switch to ON.
   3. Push AV control unit POWER switch.
   4. Check signal between the terminals of Bose speaker amp. connectors.

      Bose speaker amp.			Condition	Reference value
      Connector	(+)	(-)
      	Terminal	Terminal
      B137	6	7	Audio signal output	Courtesy of NISSAN NORTH AMERICA, INC.
      B138	37	27

   Is the inspection result normal?

   YES 

   Replace front tweeter. Refer to REMOVAL AND INSTALLATION .

   NO 

   GO TO STEP 4  .

4. CHECK FRONT TWEETER SIGNAL CIRCUIT CONTINUITY (AV CONTROL UNIT)
   
   
   1. Turn ignition switch to OFF.
   2. Disconnect Bose speaker amp. connector B138 and AV control unit connector M108.
   3. Check continuity between Bose speaker amp. connector B138 and AV control unit connector M108.

      Bose speaker amp.		AV control unit		Continuity
      Connector	Terminal	Connector	Terminal
      B138	18	M108	2	Yes
      	32		3
      	19		11
      	20		12

   4. Check continuity between Bose speaker amp. connector B138 and ground.

      Bose speaker amp.		Ground	Continuity
      Connector	Terminal
      B138	18	-	No
      	32
      	19
      	20

   Is the inspection result normal?

   YES 

   GO TO STEP 5  .

   NO 

   Repair or replace harness or connectors.

5. CHECK FRONT TWEETER SIGNAL (AV CONTROL UNIT)
   
   
   1. Connect Bose speaker amp. connector B138 and AV control unit connector M108.
   2. Turn ignition switch to ON.
   3. Push AV control unit POWER switch.
   4. Check signal between AV control unit connector M108 and ground.

      AV control unit connector M108		Condition	Reference value
      (+)	(-)
      Terminal	Terminal
      2	3	Audio signal output	Courtesy of NISSAN NORTH AMERICA, INC.
      11	12

   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 .