45 PSM 5.7 911 Turbo (996) · Communication between control module and

45 PSM 5.7 911 Turbo (996) Communication between control module and Porsche System Tester ll No. 9588 The following conditions must be met in order to establish communi- cation between the vehicle electrical system control module and the Porsche System Tester ll No. 9588: • Porsche System Tester II No. 9588 connected to data link con- nector • Ignition on • Battery positive voltage > 11 V General information on the fault memory ♦The fault memory of the control unit can save up to three differ- ent faults simultaneously ♦If all three fault memories are occupied, the new fault overwrites the oldest fault ♦The contents of the fault memory are retained even when the unit is removed ♦It is possible to delete faults in the control unit only after an "igni- tion reset (off - on)" procedure Diagnostic conditions The fault can only be identified if the requirements listed under Diag- nostic conditions are met. For this reason, the specified procedure must be observed after a fault is repaired: 1. Erase fault memory 2. Satisfy the requirements listed under 'Diagnostic conditions' 3. Read out fault memory again Possible causes of fault The possible fault causes that may be responsible for the fault are listed here. Please note that in certain circumstances further faults can be stored in the fault memory after troubleshooting (e.g. if plugs are disconnected). After carrying out repairs, read out the fault memory of all control modules and erase any faults. Diagnosis/troubleshooting The fault memory Info key F8 on the Porsche System Tester ll No. 9588 can be used to access the extended fault memory. This information should be saved using the F4 key and printed out. 45-1 page 2 4503 Introduction Ein_ps05 Printed in Germany – 29, 2002