Fault Memory Text

Fault Memory Texts
The possible fault memory texts are described in the troubleshooting section under the heading "trouble codes".

For each fault stored, additional information can be called up.

When a fault is displayed, the additional information can be called up by pressing key 1.

Example:

1: Air intake
temperature sensor.

Press key 1.

The following additional information will then be displayed.

1: * * * * * * * *
2: * * * * * * * *
7 6 5 4 3 2 1 0.

Fault Type Byte
- The fault type byte indicates the tape of fault.
- The individual bits of the fault type byte are displayed above the figures 1 to 7.
- The first row indicates the current status of a suspected fault. The bits are updated each time a fault changes from inactive to active.
- The second row indicates the debounced fault status. The first status signal received is always indicated.

The significance of the individual bits is as follows:
Bit 0 - signal above upper limit / short to positive / or rich mixture limit
Bit 1 - signal below lower limit / short to ground / lean mixture limit
Bit 2 - interruption or no signal
Bit 3 - implausible signal, implausible component section or malfunction
Bit 4 - fault relevant to OBD
Bit 5 - light flashing
Bit 6 - active
Bit 7 - sporadic

- Press > key.

< Frequency: 25
Fault erasing counter 40
Fault time: 125.

Frequency Counter
Maximum indication 255.
The first time a fault is detected, the counter is set to zero. Each time the status of the fault changes from inactive to active the counter value is increased by 1.

Fault Erasing Counter
Fault erasing counter, refer to Description and Operation Definitions

Fault Time
The fault time, displayed in seconds, indicates the time a fault has been active. The maximum value displayed is 127 seconds. The fault time is only important in the case of sporadic faults or misfiring.

- Press > key.

< Check Engine
On: TRIP 02
off: TRIP 03.

This display shows which conditions must be met how many times in order to switch the check engine light on or off.
Special case means that the general debouncing routine does not apply and that this fault is subject to a special debouncing routine.

- Press > key.

< Environment 1:
Speed: 6000 rpm
Load: 100 ms
Time: 100.4 hrs.

The Environment 1 display shows the conditions at which a fault occurred for the first time. For each fault, three conditions and an operating hours figure are stored. The conditions represent the operating conditions of the engine when the fault occurred.

The following conditions may be stored and displayed.
- engine speed
- load
- engine temperature
- supply voltage
- throttle valve angle
- air intake temperature
- tank level (empty or full)
- time (operating hours) of first (Environment 1) and last (Environment 2) occurrence of fault. The time during which the fault has occurred can be calculated by deducting the value from Environment 1 from the current operating hours figure.

- Press > key.

Environment 2:
Speed: 1000 rpm
Load: 10 ms
Time: 116.5 hrs.

Environment 2 shows the conditions when the fault occurred most recently.

NOTE:In the case of misfiring, the environment display may not necessarily show the speed and load values at the time of the fault. For misfiring detection, 1,000 or 200 crankshaft revolutions are evaluated. If misfiring occurs in a monitoring cycle, the conditions at the end of the cycle are stored. This may in fact be a load or speed range in which no misfiring occurred.

- Press > key.

OBD Code: Pxxxx
Fault code: -xxx-
return: N.

The P code and the Porsche fault code are displayed. Some faults can only be distinguished on the basis of the Porsche fault code; e.g. whether misfiring is relevant to emissions or may damage the catalytic converter.

NOTE: When reading the DTC memory, it is possible to switch the system tester to a so-called online mode, i.e. the tester always outputs the current data status. However, updating of the screens after operation of a key takes much longer in this mode. Online mode is advantageous when searching for a loose contact, for example, because the current status is always displayed. In order to switch the tester to online mode, press key 2 in the display "Number of faults".

Number
of faults
===> 1 <===.

- Press key 2

Online mode is indicated by a flashing asterisk in the screen "Number of faults" and the colon flashes in the fault displays.

Number
* of faults
===> 1 <===