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Home >> Porsche >> 2003 >> 911 Carrera 4S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 39 (Radio, Navigation, Telephone, Pcm & Park Assistant - Diagnosis) >> Navigation - introduction >> General information on the fault memory >> Fault memory Info key "F8"

Fault memory Info key "F8"

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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.

FAULT TYPE - FREQUENCY COUNTER/TEMPERATURE/VOLTAGE; SPEED/TIME OF OCCURRENCE

Fault type The display shows which fault type has occurred:
  • No GPS info
  • Gyroscope faulty
Frequency 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 for each "ignition 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.
First occurrence (month, day) The date (month and day) on which the fault was first detected is displayed.
Temperature - first occurrence The value indicates the temperature (temperature sensor in the gateway) at the time the fault occurred. The temperature of the fibre optic transmitter is monitored: max 85°C.
Speed - first occurrence The value indicates the vehicle speed at the time the fault occurred.
Supply voltage - first occurrence The value indicates the voltage at the time the fault occurred.
Hourmeter - first occurrence The value indicates the operating hours at the time the fault first occurred.
Last occurrence (month, day) The date (month and day) on which the fault was last detected is displayed.
Temperature - last occurrence The value indicates the temperature (temperature sensor in the gateway) at the time the fault was last detected.
The temperature of the fibre optic transmitter (FOT) is monitored: max 85 °C.
Supply voltage - last occurrence The value indicates the voltage at the time the fault last occurred.
Hourmeter - last occurrence The value indicates the operating hours at the time the fault was last detected.