Fault Table - Audi A8 1994 Service Manual

Motronic injection and ignition system (6-cylinder) - Edition 02.1999
Note:
If the ignition is switched off between interrogating the fault memory and erasing the fault memory, the fault
memory will not be erased. It is therefore important to follow the procedure exactly, i.e. first interrogate the fault
memory and then erase it.
- Press ⇒key.
-> Indicated on display:
Rapid data transfer
Select function XX
- Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.
Automatic test sequence
During test and assembly work faults can be recognised from other control units like e.g. plug disconnected.
Therefore on completion the fault memories of all control units must be interrogated and erased. To do this:
- Press key 0 twice for address word "Automatic test sequence" and confirm entry with Q key. The V.A.G
1551 transmits all known address words one after the other.
When a control unit answers with its identification the number of stored faults appears on the display or "No
fault recognised".
Any system faults that are stored will be displayed one after the other and printed out. The V.A.G 1551 will then
transmit the next address word.
-> The automatic test sequence has ended when the following appears on the display:
V.A.G - SELF-DIAGNOSIS
1 - Rapid data transfer*
2 - Flash code output*
- Erase all fault memories and then carry out a road test.
- Interrogate the fault memories of all control units again using the "automatic test sequence". No faults must
be stored in fault memory.
If no fault is stored:
- Press the ⇒key.
-> Indicated on display:
Rapid data transfer
Select function XX
- Press keys 0 and 6 for the "End data transfer" function and confirm input with the Q key.

2.2 - Fault table

Notes:
◆ If faults occur in the sensors and components being monitored, they will be stored in the fault memory
together with an indication of the type of fault.
◆ Faults relating to the electronic throttle are also indicated by the EPC (Electronic Power Control) warning
lamp in the dash panel insert. Notes on electronic throttle system=>Page
◆ If the connector for the engine control unit is unplugged or if the battery is disconnected, all the learned
values stored in the control unit will be erased, although the contents of the fault memory will remain intact.
The next time the engine is started the idling may be rough at first.
In addition, the following adaption procedures must be performed => Page
◆ The fault table is arranged according to the 5-digit fault codes in the left-hand column.
◆ If a fault is stored in the fault memory and then does not occur again during the next 40 engine warm-up
phases, the fault code will be automatically erased.
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with respect to the correctness of information in this document. Copyright by AUDI AG.
2.1 - Interrogating and erasing fault memory
Audi A8 1994 ➤
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