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800A PCM2 - gateway: Diagnosis/troubleshooting

TROUBLESHOOTING (800A PCM2 - GATEWAY)

Work instruction Display OK If not OK
1 Read out PCM2 fault memory.
  • Connect the Porsche System Tester II 9588 to the diagnostic socket, start it and switch on the ignition.
  • Select 911 (996) in the Vehicle type menu and confirm with the "FORWORD" key.
  • Select PCM in the Control modules menu and confirm with the "FORWORD" key.
  • Select PCM2 GW in the PCM2 function selection and confirm with the "FORWORD" key.
  • Click the "> >" key in the Fault memory menu.
  • Read out fault memory.
  • Clear fault memory.
  • Remove ignition key and switch on ignition again.
  • Read out fault memory.
  • Extract ambient data, press the "FORWORD" key.
 -> End. Fault code is still displayed.
Step 2.
2 Check CAN comfort (high) for open circuit.
  • Switch off the ignition.
  • Pull off plug C on the PCM2 control module.
  • Pull off plug B on the air-conditioning system control module.
  • Pull off plug A on the instrument cluster control module.
  • Measure specific resistance between pin 1 of plug C on the PCM2 control module and pin 1 of plug B on the air-conditioning control module.
 < 0.5
Step 3.		 Repair open circuit in wiring harness.
-> End.
3 Check CAN comfort (low) for open circuit.
  • Measure specific resistance between pin 2 of plug C on the PCM2 control module and pin 2 of plug B on the air-conditioning control module.
 < 5
Step 4.		 Repair open circuit in wiring harness.
-> End.
4
  • Replace PCM2.
 -> End.
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