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5.5 - Fault table
Notes:
◆ Faults occurring in monitored sensors or components are stored in fault memory together with an indication
of the type of fault.
◆ The fault table is arranged according to the 5-digit fault codes on the left.
◆ All static and sporadic faults are stored in the fault memory:
A fault is recognised as being static if it is present for at least 2 seconds. If a fault is then no longer present,
it is stored as being sporadic and "sporadic" also appears on display.
◆ After switching on ignition, all faults present are set to sporadic and only stored as being static if they are
still present after checking.
◆ Sporadic faults are erased if they do not re-occur in the course of 50 driving cycles (ignition on for at least
5 minutes, vehicle speed greater than 30 km/h).
◆ Do not immediately replace components indicated as being defective by VAS 5051, but rather: Start by
checking wiring and connectors to these components in line with current flow diagram. Also use current flow
diagram to check earth connections. This is particularly important if faults are output as being "sporadic".
◆ On completion of repair work, fault memory is to be interrogated again and erased.
Readout on VAS 5051 Possible cause of trouble Remedy
00532
Supply voltage
- Signal too low - Open circuit in wiring or short in power
supply
- Use current flow diagram to perform fault-
finding
=> Current Flow Diagrams, Electrical Fault-
finding and Fitting Locations binder
00625
Vehicle speed signal
- Implausible signal - Open circuit in wiring or short between
ABS control unit -J104 and headlight
range control unit -J431
- Use current flow diagram to perform fault-
finding
=> Current Flow Diagrams, Electrical Fault-
finding and Fitting Locations binder
- ABS control unit -J104 defective - Replace ABS control unit -J104
=> Brake System; Repair Group 45
Readout on VAS 5051 Possible cause of trouble Remedy
00774
Rear left vehicle level sender
-G76
- Short to positive
- Open circuit/short to earth
- Open circuit in wiring or short be‐
tween sender -G76 and control unit
- Use current flow diagram to perform
fault-finding
=> Current Flow Diagrams, Electrical
Fault-finding and Fitting Locations bind‐
er
- Sender -G76 defective - Replace sender -G76
=> Running Gear, Front-wheel Drive
and Four-wheel Drive; Repair Group 42;
Rear axle component layout Rear axle
component layout
00776
Front left vehicle level sender
-G78
- Short to positive
- Open circuit/short to earth
- Open circuit in wiring or short be‐
tween sender -G78 and control unit
- Use current flow diagram to perform
fault-finding
=> Current Flow Diagrams, Electrical
Fault-finding and Fitting Locations bind‐
er
Audi A8 1994 ➤
Electrical system Self-diagnosis 02.99 ➤ - Edition 05.2002
5.5 - Fault table 149
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