Audi A8 1994 - Final Control Diagnosis

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Readout on VAS 5051 Possible cause of trouble Remedy
- Open circuit/short to earth
- Short to positive
- Open circuit in wiring or
short to positive/earth be‐
tween positioning motor -
V49 and control unit -J431
- Use current flow diagram to
perform fault-finding
=> Current Flow Diagrams,
Electrical Fault-finding and
Fitting Locations binder
- Positioning motor -V49 de‐
fective
- Replace positioning motor -
V49
=> Electrical System; Repair
Group 94; Servicing head‐
lights; Removing and instal‐
ling headlight range control
positioning motor Servicing
headlights; Removing and in‐
stalling headlight range con‐
trol positioning motor
01537
Vehicle level sender - supply voltage
- Short to positive
- Open circuit/short to earth
- Open circuit in wiring or
short to positive/earth be‐
tween control unit and vehi‐
cle level sender
- Use current flow diagram to
perform fault-finding
=> Current Flow Diagrams,
Electrical Fault-finding and
Fitting Locations binder
Readout on VAS 5051 Possible cause of trouble Remedy
01539
Headlights not set - Basic setting 2 not performed - Perform full basic setting => Page
153
- Vehicle level sender outside adjust‐
ment range
- Replace holder for vehicle level send‐
er
=> Running gear, Front-wheel drive
and four-wheel drive; Repair Group 40;
Removing and installing track control
link Removing and installing track con‐
trol link
01577
Switch-off due to overheating - Overheating in electronics of headlight
range control unit (headlight range con‐
trol positioning motor/headlight me‐
chanical system stiff)
- Replace headlight range control po‐
sitioning motor/headlight
=> Electrical System; Repair Group 94;
Servicing headlights Servicing head‐
lights
65535
Control unit defective - Headlight range control unit -J431 de‐
fective
- Replace control unit
=> Electrical System; Repair Group 94;
Servicing automatic headlight range
control; Removing and installing head‐
light range control unit -J431 Servicing
automatic headlight range control; Re‐
moving and installing headlight range
control unit -J431
5.6 - Final control diagnosis
Notes:
◆ Final control diagnosis can only be performed with engine stopped and ignition switched on.
Audi A8 1994 ➤
Electrical system Self-diagnosis 02.99 ➤ - Edition 05.2002
5.5 - Fault table 151