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Sequence of operations
-> Display on VAS 5051:
- From list -1- select diagnosis function "00 - Interrogating fault memory - entire system".
- Fault memories of all vehicle systems with self-diagnosis capability are interrogated
- Wait until next display appears.
If a control unit responds with its identification, the number of stored faults or "No faults detected" appears on
the display.
Any stored system faults are consecutively displayed. VAS 5051 then transmits the next address word.
If a fault relating to "Data bus..." or "...no communication" is displayed:
- Check whether correct control units have been fitted for vehicle (part number and code).
If correct control units have been fitted:
- Check for proper connection of multi-pin connectors of control units.
If multi-pin connectors are properly attached:
- Check CAN bus system.
Testing "two-wire bus system"
- Assess faults stored in control units.
Note:
Assessment helps to localise wiring fault.
Audi A3 1997 ➤
Electrical system Self-diagnosis - Edition 02.2002
110 01 - Self-diagnosis
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