800A CDR23

800A CDR23

CAN Comfort Signal Fault, Air-Conditioning System

Diagnostic conditions
- Ignition ON
- Start CDR23

Possible cause of fault
- CAN comfort (high) - open circuit
- CAN comfort (low) - open circuit

CAN comfort is connected to the following control units:
- PCM2 as of model year 2003
- Instrument cluster
- Air-conditioning system control module
- Radio

NOTE: The plug connections of control modules connected to CAN comfort are disconnected during troubleshooting. This causes additional CAN-related fault codes, e.g. "9110 DME control module" to be stored in the fault memory of the instrument cluster. These fault codes should be ignored initially and must be deleted when troubleshooting is complete.

Affected pin







CDR23 plug E, pins 1 and 2

Diagnosis/Troubleshooting

Work Instruction 1 - 4: