Fault Code 38

Fault code 38

CAN timeout for PCM

NOTE:
- The CAN comfort bus is connected to the following control units:
- Instrument cluster
- Air-conditioning system regulator
- PCM2/CDR23 (if present)
- Communication between the 9588 Porsche System Tester II and the air-conditioning system regulator or PCM2/CDR23 (if preseW occurs via the instrument cluster and the CAN comfort bus.

Diagnostic conditions
- Ignition on

Possible cause of fault
- CAN message missing from PCM(2)
- Open circuit of CAN-high lead between PCM(2) and CAN comfort connection point
- Open circuit of CAN-low lead between PCM(2) and CAN comfort connection point
- PCM(2) not connected or faulty

Diagnosis/troubleshooting