Diagnosis Procedure

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

1. HARNESS CHECK
   1. Disconnect BOSE speaker amp. connector M112 and suspect tweeter connector.
   2. Check continuity between BOSE speaker amp. harness connector M112 (A) and suspect tweeter harness connector (B).
      CONTINUITY CHART
      
      

      A		B		Continuity
      Connector	Terminal	Connector	Terminal
      M112	4	M109	1	Yes
      	5		2
      	8	M111	1
      	13		2

      Fig 1: Checking Continuity Between Bose Speaker Amp. Harness Connector M112 And Suspect Speaker Harness Connector

      Courtesy of NISSAN MOTOR CO., U.S.A.
   3. Check continuity between BOSE speaker amp. harness connector M112 (A) and ground.
      CONTINUITY CHART
      
      

      A		-	Continuity
      Connector	Terminal
      M112	4	Ground	No
      	5
      	8
      	13

      Are continuity test results as specified? 

      YES: GO TO  2.

      NO:

      • Check connector housings for disconnected or loose terminals.
      • Repair harness or connector.
2. FRONT TWEETER SIGNAL CHECK
   1. Connect BOSE speaker amp. connector M112 and suspect tweeter connector.
   2. Turn ignition switch to ACC.
   3. Push "POWER" switch.
   4. Check the signal between BOSE speaker amp. harness connector M112 terminals with CONSULT-III or oscilloscope.
      SIGNAL REFERENCE
      
      

      Connector	Terminal		Condition	Reference signal
      	(+)	(-)
      M112	4	5	Receive audio signal	Courtesy of NISSAN MOTOR CO., U.S.A.
      	8	13

      Fig 2: Checking Signal Between Bose Speaker Amp. Harness Connector M112 Terminals

      Courtesy of NISSAN MOTOR CO., U.S.A.

      Is audio signal voltage as specified? 

      YES: Replace suspect tweeter. Refer to "REMOVAL AND INSTALLATION ".

      NO: GO TO  3.

3. HARNESS CHECK
   1. Disconnect AV control unit connector M72 and BOSE speaker amp. connector M113.
   2. Check continuity between AV control unit harness connector M72 (A) and BOSE speaker amp. harness connector M113 (B).
      CONTINUITY CHART
      
      

      A		B		Continuity
      Connector	Terminal	Connector	Terminal
      M72	113	M113	18	Yes
      	119		32
      	109		19
      	115		20

      Fig 3: Checking Continuity Between AV Control Unit Harness Connector M72 And Bose Speaker Amp. Harness Connector M113

      Courtesy of NISSAN MOTOR CO., U.S.A.
   3. Check continuity between AV control unit harness connector M72 (A) and ground.
      CONTINUITY CHART
      
      

      A		-	Continuity
      Connector	Terminal
      M72	113	Ground	No
      	119
      	109
      	115

      Are continuity test results as specified? 

      YES: GO TO  4.

      NO:

      • Check connector housings for disconnected or loose terminals.
      • Repair harness or connector.
4. FRONT TWEETER SIGNAL CHECK
   1. Connect AV control unit connector and BOSE speaker amp. connector.
   2. Turn ignition switch ACC.
   3. Push "POWER" switch.
   4. Check the signal between AV control unit harness connector M72 terminals with CONSULT-III or oscilloscope.
      SIGNAL REFERENCE
      
      

      Connector	Terminals		Condition	Reference signal
      	(+)	(-)
      M72	113	119	Receive audio signal	Courtesy of NISSAN MOTOR CO., U.S.A.
      	109	115

      Fig 4: Checking Signal Between AV Control Unit Harness Connector M72 Terminals

      Courtesy of NISSAN MOTOR CO., U.S.A.

      Are the audio signal voltage readings as specified? 

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

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