9606 Telephone/Telematics

9606 Telephone/telematics

No MOST communication

Diagnostic conditions
- Ignition on
- PCM2 on

Possible cause of fault
- Short circuit between the two CAN leads (CAN-high and CAN-low)
- Short circuit between CAN-high (drive) and ground
- Short circuit between CAN-low (drive) and voltage
- A faulty control unit connected to CAN drive bus

NOTE:
- The CAN drive bus is connected to the following control units:
Affected pins
- DME
- Tiptronic
- PSM and steering angle sensor
- Instrument cluster

NOTE: The plug connections of control units connected to the CAN drive bus are disconnected for trouble shooting. This has the effect that additional CAN relevant fault codes such as "9110 DME control unit" are stored in the fault memory of the instrument cluster. These fault codes should be initially ignored and should be deleted on completion of the troubleshooting.

Affected pin
Instrument cluster connector A, pin 15 and pin 31


Diagnosis/troubleshooting