Microphone

POWER SUPPLY AND GROUND CIRCUIT (SEDAN)

MICROPHONE : Diagnosis Procedure

Regarding Wiring Diagram information, Sedan.

1. CHECK POWER SUPPLY CIRCUIT (MICROPHONE SIDE)

1.Turn ignition switch ON.





2.Check voltage between microphone harness connector R7 terminal 4 and ground.





Is approximately 5V present?
YES- GO TO 3
NO- GO TO 2

2. CHECK POWER SUPPLY CIRCUIT (CONTINUITY)






1.Turn ignition switch OFF.
2.Disconnect microphone and Bluetooth control unit harness connectors.
3.Check continuity between microphone harness connector R7
(A) terminal 4 and Bluetooth control unit harness connector
B126 (B) terminal 29.





4.Check continuity between microphone harness connector R7
(A) terminal 4 and ground.





Are the continuity results as specified?
YES- Replace the Bluetooth control unit. Base Audio.
NO- Repair harness or connector.

3. CHECK GROUND CIRCUIT






1.Turn ignition switch OFF.
2.Disconnect microphone harness connector R7 and Bluetooth control unit harness connector B126.
3.Check continuity between microphone harness connector R7
(A) terminal 2 and Bluetooth control unit harness connector
B126 (B) terminal 8.





Does continuity exist?
YES- Inspection End.
NO- Repair harness or connector.