Subwoofer Bose Audio With Navigation

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 subwoofers using the audio signal circuits.




Diagnosis Procedure
Regarding Wiring Diagram information, Bose Audio With Navigation.
1.CONNECTOR CHECK
Check the AV control unit, BOSE speaker amp. and speaker connectors for the following:
- Proper connection
- Damage
- Disconnected or loose terminals
Is the inspection result normal?
YES - GO TO 2
NO - Repair the terminal and connector.
2.HARNESS CHECK





1. Disconnect BOSE speaker amp. connector B122 and suspect rear subwoofer connector.
2. Check continuity between BOSE speaker amp. harness connector B122 (A) and suspect rear subwoofer harness connector (B).





3. Check continuity between BOSE speaker amp. harness connector B122 (A) and ground.





Are the continuity test results as specified?
YES - GO TO 3
NO - Repair harness or connector.
3.REAR SUBWOOFER SIGNAL CHECK





1. Connect BOSE speaker amp. connector B122 and suspect rear subwoofer connector.
2. Turn ignition switch to ACC.
3. Push AV control unit "POWER" switch.
4. Check the signal between BOSE speaker amp. harness connector B122 terminals with CONSULT-III or oscilloscope.





Is the audio signal voltage as specified?
YES - Replace suspect rear subwoofer. Removal And Installation Bose Audio With Navigation, "Removal and Installation".
NO - GO TO 4
4.HARNESS CHECK
1. Disconnect AV control unit connector M100 and BOSE speaker amp. connector B121.





2. Check continuity between AV control unit harness connector
M100 (A) and BOSE speaker amp. harness connector B121 (B).





3. Check continuity between AV control unit harness connector
M100 (A) and ground.





Are continuity test results as specified?
YES - GO TO 5
NO - Repair harness or connector.
5.REAR SUBWOOFER SIGNAL CHECK





1. Connect AV control unit connector M100 and BOSE speaker amp. connector B121.
2. Turn ignition switch to ACC.
3. Push AV control unit "POWER" switch.
4. Check the signal between AV control unit harness connector
M100 terminals with CONSULT-III or oscilloscope.





Are the audio signal voltage readings as specified?
YES - Replace BOSE speaker amp. Removal And Installation Bose Audio With Navigation.
NO - Replace AV control unit. Service and Repair.