Audi Workshop Service and Repair Manuals > A3 Mk1 > Vehicle electrics | Electrical system Self-diagnosis | Self diagnosis, V.A.G Inspection Service | Automatic headlight range control self-diagnosis

Electrical system Self-diagnosis

Automatic headlight range control self-diagnosis

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	Fault remedy
00532
Supply voltage
- Signal too low	- Open circuit in wiring or short circuit in power supply	- Use current flow diagram to perform fault-finding
00625
Speed signal
- Implausible signal	- Open circuit in wiring or short circuit between ABS with EDL control unit -J104 and headlight range control unit -J431	- Use current flow diagram to perform fault-finding
	- ABS with EDL control unit -J104 defective	- Replace -J104

Display on VAS 5051	Possible cause of trouble	Fault remedy
00774
RL self-levelling sender -G76
- Short to positive - Open circuit/short to earth	- Open circuit in wiring or short circuit between -G76 and control unit	- Use current flow diagram to perform fault-finding
	- -G76 defective	- Replace -G76
00776
FL self-levelling sender -G78
- Short to positive - Open circuit/short to earth	- Open circuit in wiring or short circuit between -G78 and control unit	- Use current flow diagram to perform fault-finding
	- -G78 defective	- Replace -G78

Display on VAS 5051	Possible cause of trouble	Fault remedy
01532
Combi-instrument signal wire
- Short to positive - Open circuit/short to earth	- Open circuit in wiring or short circuit between headlight range control unit -J431 and dash panel insert	- Use current flow diagram to perform fault-finding
	- Dash panel insert defective	- Replace dash panel insert
01533
Terminal 56 (headlight)
- Open circuit in wiring	- Open circuit in wiring/terminal 56 between lighting switch -E1 and headlight range control unit -J431	- Use current flow diagram to perform fault-finding
01534
L headlight range ctrl posit. motor -V48
- Open circuit in wiring/short to earth - Short to positive	- Open circuit in wiring or short to positive/earth between -V48 and control unit -J431	- Use current flow diagram to perform fault-finding
	- -V48 defective	- Replace -V48

Display on VAS 5051	Possible cause of trouble	Fault remedy
01535
R headlight range ctrl posit. motor -V49
- Open circuit in wiring/short to earth - Short to positive	- Open circuit in wiring or short to positive/earth between -V49 and control unit -J431	- Use current flow diagram to perform fault-finding
	- -V49 defective	- Replace -V49
01537
Sender for veh. level/supp. volt.
- Short to positive - Open circuit/short to earth	- Open circuit in wiring or short to positive/earth between control unit and vehicle level sender	- Use current flow diagram to perform fault-finding

Display on VAS 5051	Possible cause of trouble	Fault remedy
01539
Headlights not set	- Basic setting 2 not performed	- Perform full basic setting
	- Vehicle level sender outside adjustment range	- Replace holder for vehicle level sender
01577
Switch-off due to excess temperature	- Excess temperature in electronics of headlight range control unit (headlight range control motor/headlight mechanical system stiff)	- Replace headlight range control motor/headlight
65535
Control unit defective	- Headlight range control unit -J431 defective	- Replace control unit

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