Fault Table - Audi A3 1997 Service Manual

Audi A3 1997 ➤
Electrical system Self-diagnosis - Edition 02.2002

9.5 - 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.
Display on VAS 5051 Possible cause of trouble
00532
Supply voltage
- Signal too low - Open circuit in wiring or short circuit in
power supply
00625
Speed signal
- Implausible signal - Open circuit in wiring or short circuit be‐
tween ABS with EDL control unit -J104 and
headlight range control unit -J431
- ABS with EDL control unit -J104 defective - Replace -J104
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Display on VAS 5051
00774
RL self-levelling sender -G76
- Short to positive
- Open circuit/short to earth
00776
FL self-levelling sender -G78
- Short to positive
- Open circuit/short to earth
Display on VAS 5051
01532
Combi-instrument signal wire
- Short to positive
- Open circuit/short to earth
01533
Terminal 56 (headlight)
228
01 - Self-diagnosis
Possible cause of trouble
- Open circuit in wiring or short circuit
between -G76 and control unit
- -G76 defective
- Open circuit in wiring or short circuit
between -G78 and control unit
- -G78 defective
Possible cause of trouble
- Open circuit in wiring or short cir‐
cuit between headlight range con‐
trol unit -J431 and dash panel
insert
- Dash panel insert defective
Fault remedy
- Use current flow diagram to perform fault-
finding
- Use current flow diagram to perform fault-
finding
Fault remedy
- Use current flow diagram to perform
fault-finding
- Replace -G76
- Use current flow diagram to perform
fault-finding
- Replace -G78
Fault remedy
- Use current flow diagram to per‐
form fault-finding
- Replace dash panel insert