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 B122 and subwoofer connector.
   3. Check continuity between Bose speaker amp. connector B122 and subwoofer connector B73.

      Bose speaker amp.		Subwoofer		Continuity
      Connector	Terminal	Connector	Terminal
      B122	55	B73	4	Yes

   4. Check continuity between Bose speaker amp. connector B122 and ground.

      Bose speaker amp.		Ground	Continuity
      Connector	Terminal
      B122	55	-	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 B122.
   2. Turn ignition switch ON.
   3. Check voltage between Bose speaker amp. connector B122 and ground.

      Bose speaker amp.		Ground	Voltage (Approx.)
      (+)		(-)
      Connector	Terminal
      B122	55	-	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 B121 and subwoofer connector.
   2. Check continuity between BOSE speaker amp. connector B121 and subwoofer connector.

      BOSE speaker amp.		Subwoofer		Continuity
      Connector	Terminal	Connector	Terminal
      B121	54	B73	2	Yes
      	49		1

   3. Check continuity between BOSE speaker amp. connector B121 and ground.

      BOSE speaker amp.		Ground	Continuity
      Connector	Terminal
      B121	54	-	No
      	49

      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 B121 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 B121.

      BOSE speaker amp. connector B121		Condition	Reference value
      (+)	(-)
      Terminal	Terminal
      54	49	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 M165 and BOSE speaker amp. connector B120.
   2. Check continuity between AV control unit connector M165 and BOSE speaker amp. connector B120.

      AV control unit		BOSE speaker amp.		Continuity
      Connector	Terminal	Connector	Terminal
      M165	124	B120	30	Yes
      	132		10

   3. Check continuity between AV control unit connector M165 and ground.

      AV control unit		Ground	Continuity
      Connector	Terminal
      M165	124	-	No
      	132

      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 M165 and BOSE speaker amp. connector B120.
   2. Turn ignition switch to ACC.
   3. Push AV control unit POWER switch.
   4. Check signal between the terminals of AV control unit connector M165.

      AV control unit connector M165		Condition	Reference value
      (+)	(-)
      Terminal	Terminal
      124	132	Audio signal output

      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 ".