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REAR TWEETER

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 rear tweeters using the audio signal circuits.


Diagnosis Procedure

Regarding Wiring Diagram information, Without 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. connectors B75 and suspect tweeter connector.
2.Check continuity between BOSE speaker amp. harness connectors B75 (A) and suspect tweeter harness connector (B).





3.Check continuity between BOSE speaker amp. harness connectors B75 (A) and ground.





Are the continuity 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 B75 terminals with CONSULT or oscilloscope.





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

4. HARNESS CHECK






1.Disconnect AV control unit connector M69 and BOSE speaker amp. connector B75.
2.Check continuity between AV control unit harness connector
M69 (A) and BOSE speaker amp. harness connector B75 (B).





3.Check continuity between AV control unit harness connector
M69 (A) and ground.





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

5. REAR TWEETER SIGNAL CHECK






1.Connect AV control unit connector M69 and BOSE speaker amp. connector B75.
2.Turn ignition switch to ACC.
3.Push "POWER" switch.
4.Check the signal between AV control unit harness connector
M69 terminals with CONSULT or oscilloscope.





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