Diagnosis Procedure

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

1. CONNECTOR CHECK 

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

   • Proper connection
   • Damage
   • Disconnected or looses terminals

   Is the inspection result normal? 

   YES: GO TO  2.

   NO: Repair the terminal and connector.

2. VERIFY SUBWOOFER POWER SUPPLY AND GROUND 

   Check subwoofer power supply and ground. Refer to "BOSE AMP.: Diagnosis Procedure ".

   Is the inspection result normal? 

   YES: GO TO  3.

   NO: Repair or replace harness or connectors.

3. CHECK SUBWOOFER AMP ON CIRCUIT CONTINUITY 
   1. Turn ignition switch OFF.
   2. Disconnect Bose speaker amp. connector B130 and subwoofer connector.
   3. Check continuity between Bose speaker amp. connector B130 and subwoofer connector B73.

      Bose speaker amp.		Subwoofer		Continuity
      Connector	Terminal	Connector	Terminal
      B130	62	B73	4	Yes

   4. Check continuity between Bose speaker amp. connector B130 and ground.

      Bose speaker amp.		Ground	Continuity
      Connector	Terminal
      B130	62	-	No

   Is the inspection result normal? 

   YES: GO TO  4.

   NO: Repair or replace harness or connectors.

4. CHECK SUBWOOFER AMP ON CIRCUIT VOLTAGE 
   1. Connect Bose speaker amp. connector B130.
   2. Turn ignition switch ON.
   3. Check voltage between Bose speaker amp. connector B130 and ground.

      Bose speaker amp.		Ground	Voltage (Approx.)
      (+)		(-)
      Connector	Terminal
      B130	62	-	Battery voltage

   Is the inspection result normal? 

   YES: GO TO  5.

   NO: Replace Bose speaker amp. Refer to "REMOVAL AND INSTALLATION ".

5. CHECK SUBWOOFER SIGNAL CIRCUIT CONTINUITY 
   1. Disconnect BOSE speaker amp. connector B130 and subwoofer connector.
   2. Check continuity between BOSE speaker amp. connector B130 and subwoofer connector.

      Bose speaker amp.		Subwoofer		Continuity
      Connector	Terminal	Connector	Terminal
      B130	56	B73	2	Yes
      	57		1

   3. Check continuity between BOSE speaker amp. connector B130 and ground.

      Bose speaker amp.		Ground	Continuity
      Connector	Terminal
      B130	56	-	No
      	57

   Is the inspection result normal? 

   YES: GO TO  6.

   NO: Repair or replace harness or connectors.

6. CHECK SUBWOOFER SIGNAL 
   1. Connect BOSE speaker amp. connector B130 and subwoofer connector.
   2. Turn ignition switch to ACC.
   3. Push AV control unit POWER switch.
   4. Check the signal between the terminals of BOSE speaker amp. connector B130.

      BOSE speaker amp. connector B130		Condition	Reference value
      (+)	(-)
      Terminal	Terminal
      56	57	Audio signal output

   Is the inspection result normal? 

   YES: Replace subwoofer. Refer to "REMOVAL AND INSTALLATION ".

   NO: GO TO  7.

7. 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
      M143	4	-	No
      	5
      	13
      	14

   Is the inspection result normal? 

   YES: GO TO  8.

   NO: Repair or replace harness or connectors.

8. 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 ".