Fault Code 35

Fault Code 35

Interface For Instrument Cluster (See Instrument Cluster FS)

NOTE:
CAN comfort bus is connected to the following control modules:
- Instrument cluster
- Air-conditioning system regulator
- PCM2/CDR23 (if available)

NOTE: Communication between the Porsche System Tester II No. 9588 and the air-conditioning system regulator or the PCM2/CDR23 (if available) is attained via the instrument cluster and the CAN comfort bus.

Diagnostic conditions
- Ignition on

Possible cause of fault
- Lacking information such as engine speed, outside temperature, speed or sun intensity, which are transferred via the CAN Comfort Bus for the purpose of air-conditioning regulation

NOTE:
- if the necessary information is not forthcoming, because the relative control unit is defective or faulty, the air-conditioning system regulator functions using substitute values and simultaneously saves the fault code 35.
- In the menu item, actual values, the substitute values can be read out. The defective control unit or faulty sensor is also indicated, so the fault memory in the instrument cluster can be read out.
- If, for example, actual values of a speed of 60 km/h for the air-conditioning in a stationary vehicle are given, this indicates a fault in the ABS/PSM System and the consequent inaccurate speed signal.



Diagnosis/troubleshooting

Work Instruction 1: