Possible Causes
| Possible Causes |
|---|
| (X712) MICROPHONE 1 IN (+) CIRCUIT OPEN |
| (X722) MICROPHONE 2 IN (+) CIRCUIT OPEN |
| (X792) MICROPHONE IN (-) CIRCUIT OPEN |
| (X712) (X722) (X792) MICROPHONE CIRCUITS SHORTED TO GROUND |
| (X712) (X722) (X792) MICROPHONE CIRCUITS SHORTED TO VOLTAGE |
| (X712) (X722) (X792) MICROPHONE CIRCUITS SHORTED TOGETHER |
| INSIDE REAR VIEW MIRROR |
| HANDS FREE MODULE |