800A CDR23

8OOA CDR23

CAN Bus Timeout, Air-Conditioning System

Diagnostic conditions
- Ignition on
- Start CDR23

Possible cause of fault
- CAN-Bus Comfort (high) open circuit
- CAN-Bus Comfort (high) open circuit

The CAN Comfort is connected to the following control units:
- PCM2 as of model year 2003
- Instrument cluster
- Air-conditioning control unit
- Radio

NOTE: The plug connections of control units connected to the CAN-Comfort are disconnected for trouble shooting. This causes additional CAN-relevant fault codes, e.g. "9110 DME control module" to be 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
CDR23 plug E, pins 1 and 2







Diagnosis/Troubleshooting

Work Instruction 1:

Work Instruction 2 - 4: