With Manufacturer's Scan Tool

Diagnosis/Troubleshooting

NOTE: The fault memory Info key F8 on Porsche System Tester II No.9588 can be used to access the 'extended fault memory'. The following information can be displayed:

Fault type
The following types of fault are possible:
- No display
- Upper limit exceeded
- Lower limit not reached
- Mechanical fault
- No signal/communication
- Base selling/adaptation incorrect or not present
- Short circuit to positive
- Short circuit to ground
- Implausible signal
- Open circuit/short circuit to ground
- Open circuit/short circuit to positive
- Open circuit
- Electrical fault in electric circuit
- Please read out fault memory
- Faulty
- Cannot be checked now

Fault status
The following types of status are possible:
- Present
- Not present

This information should be saved using the Save key F4 and printed out.

NOTE:
- Intermittent faults: If there are faults which occur intermittently, check the wiring positions which are linked to moving parts on and in the vehicle for each system. The different conditions which can give rise to faults must be simulated using the wiring diagram. Another suitable tool is the Porsche System Tester II No.9588, which displays the current fault status and switches from 'static'(fault present) to 'intermittent'(fault was present, but is now absent).
- Visual inspection: During troubleshooting, check first that the affected pins on the plug connection for the drivers and/or passenger seat adjustment memory control module are neither damaged nor corroded. The wiring and plugs of the affected components must also be checked for external damage and correct contacts. Repair damaged or corroded pins where possible or replace affected pins. Repair or replace damaged wires.
- Battery voltage and signals: A battery voltage of between 11.4 and 14.5 V is required for troubleshooting. This must be checked and provided where necessary. Signals and voltages to the inputs of components and fuses must be guaranteed on the vehicle electrical system.
- With the 'short circuit to positive' fault, which is displayed using the F8 key in the Porsche System Tester II No.9588, conventional diagnosis/troubleshooting cannot be carried out for some fault codes. The reason for this is that the ignition cannot be switched on when there is no control module connected. It is therefore not possible to differentiate unambiguously between a short circuit to terminal 30 and a short circuit to terminal 15. Components and wiring must therefore be thoroughly inspected before any control module is replaced.