Work Instruction 5 - 7
Fault Code 37
Fault code 37
CAN signal 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 present occurs via
the instrument cluster and the CAN comfort bus.
Diagnostic conditions
- Ignition on
Possible cause of fault
- Signal from PCM(2) absent or implausible
- PCM(2) faulty
Diagnosis/troubleshooting
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