Diagnosis Procedure

1. Turn ignition switch OFF.
2. Disconnect BOSE amp. connector and AV control unit connector.
3. Check continuity between BOSE amp. harness connector and AV control unit harness connector.

   AV control unit		BOSE amp.		Continuity
   Connector	Terminal	Connector	Terminal
   M209	30	B230	37	Existed

4. Check continuity between BOSE amp. harness connector and ground.

   BOSE amp.		Ground	Continuity
   Connector	Terminal
   B230	37		Not existed

Is the inspection result normal?

YES 

GO TO STEP 2. 

NO 

Repair harness or connector.

1. Connect BOSE amp. connector and AV control unit connector.
2. Turn ignition switch ON.
3. Check voltage between BOSE amp. harness connector and ground.

   (+)		(-)	Condition	Voltage (Approx.)
   BOSE amp.
   Connector	Terminal
   B230	37	Ground	Driver's Audio Stage ON.	0 V
   			Driver's Audio Stage OFF.	8.5 V

Is the inspection result normal?

YES 

Replace BOSE amp. Refer to REMOVAL AND INSTALLATION .

NO 

Replace AV control unit. Refer to REMOVAL AND INSTALLATION .