check engine AUDI A4 1998 B5 / 1.G APB Engine Additional Signals Checking Owner's Manual

24-205

- Press button 0- twice to select "Automatic test
sequence", address word 00. Press -Q- button
to confirm input.


DTC memory of all OBD capable systems in
the vehicle will be checked.
When a control module responds with its
identification, the display indicates the number of
stored errors or indicates "no malfunctions
recognized".
DTCs stored in the system are indicated in
sequence and printed out. Then the VAG1551
scan tool sends the next address word.
VAG - On Board Dia
gnostic
(OBD
) HELP
1- Rapid data transfer*2- Blink code output*

The automatic test sequence is over when the following indication
appears on the display:
If a malfunction related to the"powertrain databus" or the "CAN-bus" is
indicated:
- Check whether the Engine Control Module (ECM) and other CAN
capable control modules installed are appropriate for this vehicle (part
no. and coding).
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