Bose Audio Without Navigation

REAR TWEETER (COUPE)

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 rear tweeters using the audio signal circuits.


Diagnosis Procedure

Regarding Wiring Diagram information, Bose Audio.

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. connectors B121, B122 and suspect tweeter connector.
2.Check continuity between BOSE speaker amp. harness connectors B121 (A) and B122 (B) and suspect tweeter harness connector (C).





3.Check continuity between BOSE speaker amp. harness connectors B121 (A) and B122 (B) and ground.





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

3. REAR TWEETER SIGNAL CHECK






1.Connect BOSE speaker amp. connectors and suspect tweeter connector.
2.Turn ignition switch to ACC.
3.Push "POWER" switch.
4.Check the signal between BOSE speaker amp. harness connectors B121 (A) and B122 (B) terminals with CONSULT or oscilloscope.





Are audio signal voltage readings as specified?
YES- Replace suspect tweeter. Bose Audio Without Navigation Coupe.
NO- GO TO 4

4. HARNESS CHECK

1.Disconnect audio unit connector M134 and BOSE speaker amp. connector B121.
2.Check continuity between audio unit harness connector M134 and BOSE speaker amp. harness connector B121.





3.Check continuity between audio unit harness connector M134 and ground.





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

5. REAR TWEETER SIGNAL CHECK

1.Connect audio unit connector M134 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 M134 terminals with CONSULT or oscilloscope.





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