Microphone Signal Circuit (Coupe)

MICROPHONE SIGNAL CIRCUIT (COUPE)

Description

Voice signals are transmitted from the microphone to the Bluetooth control unit using the microphone signal circuits.


Diagnosis Procedure

Regarding Wiring Diagram information, Bose Audio.

1. CHECK HARNESS BETWEEN BLUETOOTH CONTROL UNIT AND MICROPHONE






1.Turn ignition switch OFF.
2.Disconnect Bluetooth control unit connector and microphone connector.
3.Check continuity between Bluetooth control unit harness connector B55 (A) and microphone harness connector R7 (B).





4.Check continuity between Bluetooth control unit harness connector B55 (A) and ground.





Are the continuity test results as specified?
YES- GO TO 2
NO- Repair harness or connector.

2. CHECK MICROPHONE POWER SUPPLY






1.Connect Bluetooth control unit connector and microphone connector.
2.Turn ignition switch ON.
3.Check voltage between microphone harness connector R7 terminal 4 and ground.
4 - Ground: Approx. 5V
Is voltage reading approx. 5 volts?
YES- GO TO 3
NO- Replace Bluetooth control unit. Bose Audio.

3. CHECK MICROPHONE SIGNAL






Check signal between Bluetooth control unit harness connector B55 terminals 7 and 8.





Are voltage readings as specified?
YES- Replace Bluetooth control unit. Bose Audio.
NO- Replace microphone. Bose Audio Without Navigation.