Diagnosis Procedure

Regarding Wiring Diagram information, refer to the appropriate Wiring Diagram .

1. CONNECTOR CHECK 

   Check the audio amp. and subwoofer connectors for the following:

   • Proper connection
   • Damage
   • Disconnected or loose terminals

   Is the inspection result normal?

   YES

   GO TO 2 .

   NO

   Repair or replace the harness or connectors.

2. CHECK SUBWOOFER SIGNAL CIRCUIT CONTINUITY (AUDIO AMP.) 
   1. Disconnect audio amp. connector M112 and subwoofer connector B105.
   2. Check continuity between audio amp. connector M112 and subwoofer connector B105.

      Audio amp.		Subwoofer		Continuity
      Connector	Terminal	Connector	Terminal
      M112	2	B105	1	Yes
      	3		3
      	18		2
      	19		4

   3. Check continuity between audio amp. connector M112 and ground.

      Audio amp.		-	Continuity
      Connector	Terminal
      M112	2	Ground	No
      	3
      	18
      	19

   Is the inspection result normal?

   YES

   GO TO 3 .

   NO

   Repair or replace the harness or connectors.

3. CHECK SUBWOOFER SIGNAL (AUDIO AMP.) 
   1. Connect audio amp. connector M112 and subwoofer connector B105.
   2. Turn ignition switch to ACC.
   3. Push "POWER" switch.
   4. Check the signal between audio amp. harness connector M112 terminals with CONSULT or oscilloscope.

      Audio amp. connector M112		Condition	Reference signal
      (+)	(-)
      Terminal	Terminal
      2	18	Receive audio signal	Courtesy of NISSAN NORTH AMERICA, INC.
      3	19

   Is the inspection result normal?

   YES

   Replace subwoofer. Refer to Removal and Installation .

   NO

   GO TO 4 .

4. CHECK SUBWOOFER SIGNAL CIRCUIT CONTINUITY (AV CONTROL UNIT) 
   1. Disconnect AV control unit connector M43 and audio amp. connector M113.
   2. Check continuity between AV control unit harness connector M43 and audio amp. harness connector M113.

      AV control unit		Audio amp.		Continuity
      Connector	Terminal	Connector	Terminal
      M43	4	M113	24	Yes
      	5		8
      	13		23
      	14		7

   3. Check continuity between AV control unit harness connector M43 and ground.

      Connector	Terminal	-	Continuity
      M43	4	Ground	No
      	5
      	13
      	14

   Is the inspection result normal?

   YES

   GO TO 5 .

   NO

   Repair or replace the harness or connectors.

5. CHECK SUBWOOFER SIGNAL (AV CONTROL UNIT) 
   1. Connect AV control unit connector M43 and audio amp. connector M113.
   2. Turn ignition switch to ACC.
   3. Push "POWER" switch.
   4. Check the signal between AV control unit harness connector M43 terminals with CONSULT or oscilloscope.

      AV control unit connector M43		Condition	Reference signal
      (+)	(-)
      Terminal	Terminal
      4	5	Receive audio signal	Courtesy of NISSAN NORTH AMERICA, INC.
      13	14

   Is the inspection result normal?

   YES

   Replace audio amp. Refer to Removal and Installation .

   NO

   Replace AV control unit. Refer to Removal and Installation .