Subwoofer

SUBWOOFER





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 subwoofer using the audio signal circuits.




Diagnosis Procedure
Regarding Wiring Diagram information, Bose Audio With Navigation.
1.VERIFY SUBWOOFER POWER AND GROUND SUPPLY
Check power and ground supply to the subwoofer. Subwoofer Bose Audio With Navigation.
Did the power and ground supply check OK?
YES - GO TO 2.
NO - - Check connector housings for disconnected or loose terminals.
- Repair harness or connector.
2.HARNESS CHECK





1. Disconnect BOSE speaker amp. connector M112 and subwoofer connector.
2. Check continuity between BOSE speaker amp. harness connector M112 (A) and M113 (B) and subwoofer harness connector
B72 (C).





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





Are the continuity test results as specified?
YES - GO TO 3.
NO - - Check connector housings for disconnected or loose terminals.
- Repair harness or connector.
3.SUBWOOFER AMP ON SIGNAL CHECK





1. Connect BOSE speaker amp. connector M112.
2. Turn ignition switch to ACC.
3. Push "POWER" switch.
4. Check voltage between subwoofer connector B72 terminal 4 and ground.





Are the voltage test results as specified?
YES - GO TO 4.
NO - Replace BOSE speaker amp. Removal And Installation Bose Audio With Navigation.
4.SUBWOOFER AUDIO SIGNAL CHECK
1. Connect BOSE speaker amp. connector M112 and subwoofer connector B72.
2. Turn ignition switch to ACC.
3. Push "POWER" switch.





4. Check the signal between BOSE speaker amp. harness connector M112 terminals with CONSULT-III or oscilloscope.





Is the audio signal voltage as specified?
YES - Replace subwoofer. Removal And Installation Bose Audio With Navigation.
NO - GO TO 5.
5.HARNESS CHECK





1. Disconnect AV control unit connector M161 and BOSE speaker amp. connector M113.
2. Check continuity between AV control unit harness connector
M161 (A) and BOSE speaker amp. harness connector M113 (B).





3. Check continuity between AV control unit harness connector
M161 (A) and ground.






Are the continuity test results as specified?
YES - GO TO 6.
NO - - Check connector housings for disconnected or loose terminals.
- Repair harness or connector.
6.SUBWOOFER SPEAKER SIGNAL CHECK
1. Connect AV control unit connector M161 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
M161 terminals with CONSULT-III or oscilloscope.










Is the audio signal voltage reading as specified?
YES - Replace BOSE speaker amp. Removal And Installation Bose Audio With Navigation, "Removal and Installation".
NO - Replace AV control unit. Removal And Installation Bose Audio With Navigation.