Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM - WITH NAVIGATION SYSTEM ".

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 2.

   NO: Repair the terminal and connector.

2. HARNESS CHECK
   1. Disconnect BOSE speaker amp. connectors B75 and suspect tweeter connector.
   2. Check continuity between BOSE speaker amp. harness connectors B75 (A) and suspect tweeter harness connector (B).

      A		B		Continuity
      Connector	Terminal	Connector	Terminal
      B75	9	D208	1	Yes
      	10		2
      	11	D308	1
      	12		2

   3. Check continuity between BOSE speaker amp. harness connectors B75 (A) and ground.

      Connector	Terminal	-	Continuity
      B75	9	Ground	No
      	10
      	11
      	12

   Fig 1: Checking Continuity Between Bose Speaker Amp. Connectors B75 (A) Terminals And Suspect Speaker Connector (B) Terminals

   Courtesy of NISSAN NORTH AMERICA, INC.

   Are the continuity test results as specified? 

   YES: GO TO 3

   NO: Repair harness or connector.

3. REAR TWEETER SIGNAL CHECK
   1. Connect BOSE speaker amp. connectors and suspect tweeter connector.
   2. Turn ignition switch to ACC.
   3. Push "POWER" switch.
   4. Check the signal between BOSE speaker amp. harness connectors B75 terminals with CONSULT or oscilloscope.

      Connector	Terminals		Condition	Reference signal
      	(+)	(-)
      B75	9	10	Receive audio signal
      	11	12

   Fig 2: Checking Signal Between Bose Speaker Amp. Connectors B75 Terminals Using Oscilloscope

   Courtesy of NISSAN NORTH AMERICA, INC.

   Are audio signal voltage readings as specified? 

   YES: Replace suspect tweeter. Refer to "REMOVAL AND INSTALLATION OF REAR DOOR SPEAKER ".

   NO: GO TO 4

4. HARNESS CHECK
   1. Disconnect AV control unit connector M39 and BOSE speaker amp. connector B75.
   2. Check continuity between AV control unit harness connector M39 (A) and BOSE speaker amp. harness connector B75 (B).

      A		B		Continuity
      Connector	Terminal	Connector	Terminal
      M39	4	B75	26	Yes
      	5		25
      	13		24
      	14		23

   3. Check continuity between AV control unit harness connector M39 (A) and ground.

      A		-	Continuity
      Connector	Terminal
      M39	4	Ground	No
      	5
      	13
      	14

   Fig 3: Checking Continuity Between AV Control Unit Connector M39 (A) And Bose Speaker Amp. Connectors B75 (B) Terminals

   Courtesy of NISSAN NORTH AMERICA, INC.

   Are the continuity test results as specified? 

   YES: GO TO 5

   NO: Repair harness or connector.

5. REAR TWEETER SIGNAL CHECK
   1. Connect AV control unit connector M39 and BOSE speaker amp. connector B75.
   2. Turn ignition switch to ACC.
   3. Push "POWER" switch.
   4. Check the signal between AV control unit harness connector M39 terminals with CONSULT or oscilloscope.

      Connector	Terminals		Condition	Reference signal
      	(+)	(-)
      M39	4	5	Receive audio signal
      	13	14

   Fig 4: Checking Signal Between AV Control Unit Connector M39 Terminals Using Oscilloscope

   Courtesy of NISSAN NORTH AMERICA, INC.

   Is the audio signal voltage reading as specified? 

   YES: Replace BOSE speaker amp. Refer to "REMOVAL AND INSTALLATION ".

   NO: Replace AV control unit. Refer to "REMOVAL AND INSTALLATION ".