Reading and Clearing Diagnostic Trouble Codes

General Information On The Fault Memory

Fault code setting conditions
Fault codes can be set in several circumstances, e.g.
- battery disconnected
- plug connections disconnected
- power failure

In these circumstances, no fault is present in the system and the fault memory must be erased.

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.

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 with the status present is set in the fault memory and the counter is simultaneously set to 50.

If a fault is present, the counter is incremented by one whenever the system is booted. The maximum count is 255.

The counter is decremented if the status fault no longer present is entered and the fault does not occur again when the system is booted. The entry in the fault memory is erased automatically when the counter reaches 0.

If the error occurs again when the counter is between 1 and 49, the counter is reset to 50.

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 degrees C.

Speed - first occurrence The value indicates the vehicle speed at the time the fault occurred.

Supply voltage - first The value indicates the voltage at the time the fault occurred.
occurrence

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 degrees C.

Supply voltage - last The value indicates the voltage at the time the fault last occurred.
occurrence

Hourmeter - last occurrence The value indicates the operating hours at the time the fault was last detected.

Display * in the menu Control modules and menu PCM2/ CDR23 MOST component check

Different required and actual installed components lists When the automatic control module search is complete, the following display * appears in front of the control module description PCM2 in the Control modules menu, as well as in the PCM2 MMI function selection in front of the entry MOST required installed components list if the Porsche System Tester II 9588 establishes a difference between the required and actual installed components list and there is no fault code in one of the fault memories of the MOST control modules.

If there is a fault code present in one of the MOST control modules, the display * is only shown in the PCM2 MMI function selection in front of the line MOST required installed components list.

If there is a display in the menu Control module, an existing fault code has priority and a # is set.