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  2.

   NO: Repair the terminals or connectors.

2. CHECK REAR SIDE SPEAKER SIGNAL CIRCUIT CONTINUITY 
   1. Disconnect BOSE speaker amp. connector B129 and suspect rear side speaker connector.
   2. Check continuity between BOSE speaker amp. connector B129 and suspect rear side speaker connector.

      BOSE speaker amp.		Rear side speaker		Continuity
      Connector	Terminal	Connector	Terminal
      B129	53	B1 (LH)	1	Yes
      	48		2
      	44	B153 (RH)	1
      	43		2

   3. Check continuity between BOSE speaker amp. connector B129 and ground.

      BOSE speaker amp.		Ground	Continuity
      Connector	Terminal
      B129	53	-	No
      	48
      	44
      	43

   Is the inspection result normal? 

   YES: GO TO  3.

   NO: Repair or replace harness or connectors.

3. CHECK REAR SIDE SPEAKER SIGNAL 
   1. Connect BOSE speaker amp. connector B129 and suspect rear side speaker connector.
   2. Turn ignition switch to ACC.
   3. Push AV control unit POWER switch.
   4. Check signal between terminals of BOSE speaker amp. connector B129.

      BOSE speaker amp. connector B129		Condition	Reference value
      (+)	(-)
      Terminal	Terminal
      53	48	Audio signal output
      44	43

   Is the inspection result normal? 

   YES: Replace rear side speaker. Refer to "REMOVAL AND INSTALLATION ".

   NO: GO TO  4.

4. CHECK PRE-AMP SIGNAL CIRCUIT CONTINUITY 
   1. Disconnect AV control unit connector M122 and BOSE speaker amp. connector B130.
   2. Check continuity between AV control unit connector M122 and BOSE speaker amp. connector B130.

      AV control unit		BOSE speaker amp.		Continuity
      Connector	Terminal	Connector	Terminal
      M122	4	B130	64	Yes
      	5		63
      	13		66
      	14		65

   3. Check continuity between AV control unit connector M122 and ground.

      AV control unit		Ground	Continuity
      Connector	Terminal
      M122	4	-	No
      	5
      	13
      	14

   Is the inspection result normal? 

   YES: GO TO  5.

   NO: Repair or replace harness or connectors.

5. CHECK PRE-AMP SIGNAL 
   1. Connect AV control unit connector M122 and BOSE speaker amp. connector B130.
   2. Turn ignition switch to ACC.
   3. Push AV control unit POWER switch.
   4. Check signal between the terminals of AV control unit connector M122.

      AV control unit connector M122		Condition	Reference value
      (+)	(-)
      Terminal	Terminal
      4	5	Audio signal output
      13	14

   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 - AV CONTROL UNIT ".