Bose Audio With Navigation

TWEETER (SEDAN)

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 tweeters using the audio signal circuits.


Diagnosis Procedure

Regarding Wiring Diagram information, Sedan.

1. CONNECTOR CHECK

Check the audio unit 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 tweeter connector.
2.Check continuity between BOSE speaker amp. harness connector B122 (A) and suspect tweeter harness connector (B).





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





Are continuity test results as specified?
YES- GO TO 3
NO- Repair harness or connector.

3. TWEETER SIGNAL CHECK






1.Connect BOSE speaker amp. connector B122 and suspect tweeter 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 or oscilloscope.





Are voltage readings as specified?
YES- Replace suspect tweeter. Bose Audio With Navigation.
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 (A)
M100 and BOSE speaker amp. harness connector B121 (B).





3.Check continuity between AV control unit harness connector
B121 (A) and ground.





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

5. TWEETER SIGNAL CHECK






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





Are voltage readings as specified?
YES- Replace BOSE speaker amp. Sedan Bose Audio With Navigation.
NO- Replace AV control unit. Service and Repair.