DME 7.8 DME 7.80 · ♦not present

DME 7.8 DME 7.80 ♦present ♦not present This information should be saved using the Save key F4 and printed out. Note! ♦Faults "not present": Where faults are entered but not actually present, after obtaining or adjusting the diagnostic conditions, wiring positions connected to moving parts on and in the vehicle must be checked systematically. Various statuses that can cause a fault to occur must be simulated with the aid of the wir- ing diagram. It should be noted that the 9588 Porsche System Tester ll shows the current fault status only conditionally. The fault frequency counter gives information on operating time and mileage at last fault occurrence ♦In difficult cases where faults are currently not present, it is rec- ommended to clear the fault memory (after printing out) and to observe whether the fault is re-entered whilst simulating a loose contact. Note! ♦Visual inspection of plug connections: As part of troubleshoot- ing, it must be ensured that the pins of affected plug connec- tions, both on the wiring side and component side, are neither damaged nor corroded. Furthermore, the wiring and plugs must be checked for external damage (cracks, etc.) and proper con- tact (pins not bent, spread or pushed into the housing). Repair damaged or corroded pins if possible, otherwise replace them. Repair or replace damaged wires. If wiring to the oxygen sen- sors is damaged, always replace the complete sensor. ♦Visual inspection of components: As part of troubleshooting, it must be ensured that there are no signs of visible damage (e.g. cracks, deformation or chafed areas) on the affected compo- nents and wiring harnesses. This is particularly important for components that cannot be tested with a multimeter, e.g. bar ignition modules, or components that can cause sporadic faults due to penetrating moisture. Note! Battery voltage and signals: A battery voltage of between 11.4 and 14.5 V is generally required for diagnosis/troubleshooting. This must be checked and, if necessary, guaranteed by means of a bat- tery charging unit. 0-PEIN page 14 2470 INTRODUCTION PEIN2DME78 Printed in Germany – 14, 2003