Control Module Memories

Faults and values stored in control modules can be deleted, if battery is disconnected, or completely discharged. If possible, all fault memories should be checked, and if necessary, printed out before battery is disconnected. An entry of "supply voltage" could be stored in various control modules, if battery has been completely discharged. Using a Porsche System Tester, delete "supply voltage" entry from all control modules in question.

After connecting battery, test drive vehicle. Fault memories of all control modules should be read out again, after a test drive.