U190C

U190C FRONT/REAR MICROPHONE

DTC Logic








Diagnosis Procedure


1. CHECK ON BOARD SELF-DIAGNOSIS

Perform on board self-diagnosis. Bose Amp Active Noise Control System.
Is the inspection result normal?
YES- INSPECTION END
NO- GO TO 2.

2. CHECK CONTINUITY BETWEEN BOSE AMP. AND FRONT/REAR MICROPHONE CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect BOSE amp. connector and front/rear microphone connector.
3.Check continuity between BOSE amp. harness connector and front/rear microphone harness connector.





4.Check continuity between BOSE amp. harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair harness or connector.

3. CHECK MICROPHONE SIGNAL

1.Connect BOSE amp. connector and front/rear microphone connector.
2.Check signal between BOSE amp. harness connector.





Is the inspection result normal?
YES- Replace BOSE amp. Service and Repair.
NO- Replace front/rear microphone. Front Microphone Active Noise Control System/Audiopilot(front microphone), Bose Audio(rear microphone).