Back Door Speaker

BACK DOOR SPEAKER


Description

The AV control unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before sending them to the back door speakers using the audio signal circuits.




BACK DOOR SPEAKER


Diagnosis Procedure

Regarding Wiring Diagram information, Electrical Diagrams.
1.HARNESS CHECK





1. Disconnect BOSE speaker amp. connectors and suspect speaker connector.
2. Check continuity between BOSE speaker amp. harness connectors M112 and M113 (A) and suspect speaker harness connector (B).





3. Check continuity between BOSE speaker amp. harness connectors M112 and M113 (A) and ground.





Are the continuity test results as specified?
YES - GO TO 2.
NO - � Check connector housings for disconnected or loose terminals.
- Repair harness or connector.
2.BACK DOOR SPEAKER SIGNAL CHECK





1. Connect BOSE speaker amp. connectors and suspect speaker connector.
2. Turn ignition switch to ACC.
3. Push "POWER" switch.
4. Check the signal between BOSE speaker amp. harness connectors M113 terminals with CONSULT-III or oscilloscope.





Are audio signal voltage readings as specified?
YES - Replace suspect speaker. Back Door Speaker.
NO - GO TO 3.
3.HARNESS CHECK





1. Disconnect AV control unit connector M42 and BOSE speaker amp. connector M113.
2. Check continuity between AV control unit harness connector
M42 (A) and BOSE speaker amp. harness connector M113 (B).





3. Check continuity between AV control unit harness connector
M42 (A) and ground.





Are the continuity test results as specified?
YES - GO TO 4.
NO - � Check connector housings for disconnected or loose terminals.
- Repair harness or connector.
4.REAR DOOR SPEAKER SIGNAL CHECK





1. Connect AV control unit connector M42 and BOSE speaker amp. connector M113.
2. Turn ignition switch to ACC.
3. Push "POWER" switch.
4. Check the signal between AV control unit harness connector
M42 terminals with CONSULT-III or oscilloscope.





Is the audio signal voltage reading as specified?
YES - Replace BOSE speaker amp. Service and Repair.
NO - Replace AV control unit. AV Control Unit.