General Information on the Fault Memory

General information on the fault memory

Fault code setting conditions
Fault codes can be set in several circumstances, e.g.:
- When disconnecting battery.
- 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.

Supply voltage fault type The display shows which fault type has occurred:
- Undervoltage '[<] 9 V'.
- Overvoltage '[>] 16 V'.

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.

Temperature: 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.

Voltage The value indicates the voltage at the time the fault occurred.

Vehicle speed: The value indicates the vehicle speed at the time the fault occurred.

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 the9588 Porsche System Tester II 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.