Subwoofer Bose Audio Without Navigation

SUBWOOFER





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 subwoofers using the audio signal circuits.




Diagnosis Procedure
Regarding Wiring Diagram information, Bose Audio Without Navigation.
1.CONNECTOR CHECK
Check the audio 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 audio 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 Without Navigation, "Removal and Installation".
NO - GO TO 4
4.HARNESS CHECK
1. Disconnect audio unit connector M46 and BOSE speaker amp. connector B121.
2. Check continuity between audio unit harness connector M46 and BOSE speaker amp. harness connector
B121.





3. Check continuity between audio unit harness connector M46 and ground.





Are continuity test results as specified?
YES - GO TO 5
NO - Repair harness or connector.
5.REAR SUBWOOFER SIGNAL CHECK
1. Connect audio unit connector M46 and BOSE speaker amp. connector B121.
2. Turn ignition switch to ACC.
3. Push audio unit "POWER" switch.
4. Check the signal between audio unit harness connector M46 terminals with CONSULT-III or oscilloscope.





Is the audio signal voltage as specified?
YES - Replace BOSE speaker amp. Removal And Installation Bose Audio Without Navigation.
NO - Replace audio unit. Removal And Installation Bose Audio Without Navigation.