Diagnosis Procedure

Diagnosis Procedure

1. CONNECTOR CHECK

   1. Check the AV control unit and Bose speaker amp. 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 SOUND SIGNAL FRONT LH CONTINUITY

   1. 1. Ignition switch OFF.

      2. Disconnect Bose speaker amp. connector and AV control unit connector.

      3. Check continuity between Bose speaker amp. connector and AV control unit connector.

         Bose speaker amp.		AV control unit		Continuity
         Connector	Terminal	Connector	Terminal
         B97	32	M103	2	Yes
         	40		3

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

         Bose speaker amp.		—	Continuity
         Connector	Terminal
         B97	32	Ground	No
         	40

   Is the inspection result normal?

   YES >>

   GO TO 3.

   NO >>

   Repair or replace harness or connectors.

3. CHECK SOUND SIGNAL FRONT LH SIGNAL

   1. 1. Connect Bose speaker amp. connector and AV control unit connector.

      2. Ignition switch ON.

      3. AV control unit ON.

      4. Check signal between AV control unit connector and ground.

         AV control unit			Condition	Reference value
         Connector	(+)	(−)
         	Terminals
         M103	2	3	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.