Diagnosis Procedure

CHECK CONTINUITY MODE CHANGE SIGNAL CIRCUIT

Turn ignition switch OFF.
Disconnect BOSE amp. connector and AV control unit connector.

Check continuity between BOSE amp. harness connector and AV control unit harness connector.

AV control unit		BOSE amp.		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M150	30	B41	17	Existed

Check continuity between BOSE amp. harness connector and ground.

BOSE amp.		Ground	Continuity
Connector	Terminal
B41	17		Not existed

Is the inspection result normal?

YES

GO TO STEP 2.

NO

Repair harness or connector.

CHECK MODE CHANGE SIGNAL

Connect BOSE amp. connector and AV control unit connector.
Turn ignition switch ON.

Check voltage between BOSE amp. harness connector and ground.

(+)		(-)	Condition	Voltage (Approx.)
BOSE amp.
Connector	Terminal
B41	17	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 EXPLODED VIEW WITH TORQUE SPECIFICATIONS .

NO

Replace AV control unit. Refer to EXPLODED VIEW WITH TORQUE SPECIFICATIONS .