Test I: DTC B2633 - Driver-Front Microphone Circuit Failure

PINPOINT TEST I: DTC B2633 - DRIVER-FRONT MICROPHONE CIRCUIT FAILURE

I1-I3:

I3-I5:

I6:

Normal Operation
The navigation system microphone is integrated into the interior rear view mirror. The microphone supplies a voice signal to the navigation module through circuits 1196 (DG/WH) and 1197 (LG/BK). The interior rear view mirror receives voltage through circuit 964 (DB/LG). Circuit 676 (PK/OG) provides the mirror ground.

DTC B2633 - sets when no input signal from the microphone is received by the navigation module through circuits 1196 (DG/WH) and 1197 (LG/BK).

Possible Causes
- Fuse
- Circuit 676 (PK/OG) open
- Circuit 964 (DB/LG) open
- Circuit 1196 (DG/WH) open, short to ground or voltage
- Circuit 1197 (LG/BK) open, short to ground or voltage
- Interior rear view mirror
- Navigation module