CAN Comfort Signal Fault, Instrument Cluster

800B CDR23

CAN comfort signal fault, instrument cluster

Diagnostic conditions
- Ignition on
- Start CDR23

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

NOTE:
- CAN comfort is connected to the following control modules:
- CDR23 as of model year 2003
- Instrument cluster
- Air-conditioning system control module
- Radio

- The plug connections of control modules connected to the CAN drive bus are disconnected for troubleshooting. This causes additional CAN-related fault codes, e.g. "9110 DMF 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 troubleshooting.

Affected pins







CDR23 plug E, pins 1 and 2

Diagnosis/troubleshooting