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 With Navigation(rear microphone).