DME 7.8 DME 7.80 · Diagnostic conditions

DME 7.8 DME 7.80 Diagnostic conditions Note! Important! All unnecessary electrical loads must be switched off before the diagnosis. When working on the vehicle with the ignition switched on for fairly long periods (above approx. 15 minutes), a suitable battery charging unit must be connected. Note! The control module can only detect the fault if the requirements listed under 'Diagnostic conditions' are met. For this reason, the specified procedure must be observed after a fault is repaired: 1. Clear the fault memory after printing out or saving 2. Satisfy the requirements listed under 'Diagnostic conditions' or perform a short test with the 9588 Porsche System Tester ll. It should be noted here that, owing to reset adaptation values (in particular for fuel supply and misfire detection), fault detection by the DME control module is only possible after a fairly long driving time. If may be necessary to observe the relevant adap- tation values ("actual values") during a subsequent test drive to be able to identify any trend 3. Read out fault memory again. Possible causes of fault Note! The 'possible causes of fault' that are responsible for the fault are listed here. Please note that in certain circumstances further faults may be stored in the fault memory after troubleshooting (e.g. if plugs are disconnected). After repairs, read out the fault memory of all control units and delete the faults appearing as a result of the troubleshooting and repairs. 0-PEIN page 12 2470 INTRODUCTION PEIN2DME78 Printed in Germany – 14, 2003