Mid Audio

MICROPHONE SIGNAL CIRCUIT

Description

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


Diagnosis Procedure

Regarding Wiring Diagram information, Mid Audio System.

1. CHECK HARNESS BETWEEN BLUETOOTH CONTROL UNIT AND MICROPHONE

1.Turn ignition switch OFF.
2.Disconnect Bluetooth control unit connector B33 and microphone connector R15.
3.Check continuity between Bluetooth control unit harness connector B33 and microphone harness connector R15.





4.Check continuity between Bluetooth control unit harness connector B33 and ground.





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

2. CHECK MICROPHONE POWER SUPPLY

1.Connect Bluetooth control unit connector B33 and microphone connector R15.
2.Turn ignition switch ON.
3.Check voltage between microphone harness connector R15 terminal 4 and ground.





Is the voltage reading as specified?
YES- GO TO 3
NO- Replace Bluetooth control unit. Mid Audio.

3. CHECK MICROPHONE SIGNAL

Check signal between Bluetooth control unit harness connector B33 terminals 7 and 8.





Were voltage readings as specified?
YES- Replace Bluetooth control unit. Mid Audio.
NO- Replace microphone. Mid Audio.