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Home >> Porsche >> 2003 >> 911 Carrera 4S, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Exterior Lights, Lamps, Switches Diagnosis - 911 CARRERA (996) >> System LWR 01 >> Introduction >> Fault memory Info key F8

Fault memory Info key F8

In order to be able to assess the fault exactly, the fault memory Info key F8 must be pressed. This information should be saved using the Save key "F4" and printed out. If a fault code is stored with "not present" status and no other problems are present, then the fault memory must be erased.

  1. Open circuit/short to ground/short to B+: 

    Short to ground / open circuit:

    There is (present) or was (not present) a short circuit to ground or an open circuit in the circuit to the control module terminal.

    Short to B+:

    There is (present) or was (not present) a short circuit to voltage.

  2. Version / vehicle parameters 

    Incorrect vehicle coding or coding not carried out.

  3. Counter 

    When a fault first occurs, a fault entry is made in the fault memory and the counter is simultaneously set to 50. If a fault is present, the counter is incremented by 1 each time the ignition is switched on. The maximum count is 100. The counter is decremented if the fault is no longer present. The fault memory is erased automatically when the counter reaches 0.