General instructions/safety instructions
The following points must be observed during vehicle diagnosis:
- When replacing a air conditioning control unit, observe the coding for the country specification, the pollen filter, the AC symbol, and the PCM (1).
- After troubleshooting or repairs, erase the fault memory with the Porsche System Tester II 9588 and carry out a test drive.
- After the test drive, read out the fault memory with the Porsche System Tester II 9588 again.
CAUTION:
Danger of damage due to improper handling of batteries and control module plug connections!
- Disconnect the battery connection terminals only when the engine is switched off!
- Start the engine only when the battery connection terminals are properly connected!
- Pull off or push on plug connections for the control units or other electronic components only when the ignition is switched off!
- Disconnect the negative terminal of the battery before welding work on the vehicle.