Preconditions for troubleshooting are that the person performing the tests

• is familiar with the location of components and the functioning and technical relationships of the systems being tested (model information)

• can read and evaluate Porsche wiring diagrams

• knows the functions of circuits and relays

• is capable of using testers, such as oscilloscope, voltmeter, ohmmeter and ammeter, as well as of evaluating the results.

A fault text on the display (fault list for flashing code) does not always indicate a fault in this component, but could also indicate a fault in the corresponding control unit and the connecting leads (paths) between the component and control unit.

No troubleshooting in the form of plug disconnection etc. must be performed with the engine running before the fault memory has been read out, because this may be stored as a fault in the fault memory.

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