Rear Door Speaker

REAR DOOR SPEAKER


Description

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





REAR DOOR SPEAKER


Diagnosis Procedure

1. HARNESS CHECK
1. Disconnect BOSE speaker amp. connectors B109, B110 and suspect speaker connector.
2. Check continuity between BOSE speaker amp. harness connectors B109 (A) and B110 (B) and suspect speaker harness connector (C).










3. Check continuity between BOSE speaker amp. harness connectors B109 (A) and B110 (B) 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. REAR 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 B109 (A) and B110 (B) terminals with CONSULT-III or oscilloscope.










Are audio signal voltage readings as specified?
YES - Replace suspect speaker. Refer to Rear Door Speaker.
NO - GO TO 3.
3. HARNESS CHECK
1. Disconnect audio unit connector M132 and BOSE speaker amp. connector B109.
2. Check continuity between audio unit harness connector M132 (A) and BOSE speaker amp. harness connector B109 (B).










3. Check continuity between audio unit harness connector M132 (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 audio unit connector M132 and BOSE speaker amp. connector B109.
2. Turn ignition switch to ACC.
3. Push POWER switch.
4. Check the signal between audio unit harness connector terminals with CONSULT-III or oscilloscope.










Is the audio signal voltage reading as specified?
YES - Replace BOSE speaker amp. Refer to Bose W/ Monochrome Display.
NO - Replace audio unit. Refer to Bose W/ Monochrome Display.