Special Service Tool
The actual shapes of the tools may differ from those illustrated here.

Commercial Service Tools

Precaution
Removal and installationSubwoofer
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
1.CONNECTOR CHECK
Check the audio unit, BOSE speaker amp. and subwoofer connect ...
AV branch line circuit
Diagnosis Procedure
1.CHECK CONNECTOR
Turn the ignition switch OFF.
Disconnect the battery cable from the negative terminal.
Check the terminals and connectors of the AV control unit for
damage, bend and loose connection (unit
side and connector side).
2.CHECK HARNESS FOR OPEN CIRC ...
Microphone signal circuit
Description
Voice signals are transmitted from the microphone to the AV control unit
using the microphone signal circuits.
Diagnosis Procedure
1.CHECK HARNESS BETWEEN AV CONTROL UNIT AND MICROPHONE
Turn ignition switch OFF.
Disconnect AV control unit connector and microphone connector ...