Automatic Headlight Range Control Self-Diagnosis; General Information - Audi A8 1994 Service Manual

-> Readout on VAS 5051:
1 - Channel 4
Read and test
4 - Original value "3"
New value "0" (example)
- Confirm new adaption value by touching "Apply" key -3-.
-> Readout on VAS 5051 following adaption:
1 - Channel 4
Value "0" saved
- Terminate function "10 - Adaption" by touching ◂ key.

5 - Automatic headlight range control self-diagnosis

5.1 - Automatic headlight range control self-diagnosis

5.2 - General information

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Differing automatic headlight range control systems are fitted in the Audi A8:
◆ Static automatic headlight range control on all vehicles with gas-discharge headlights up to MY 00:
◆ Automatic dynamic headlight range control as from MY 01.
Function
Static automatic headlight range control corrects the angle of the dipped beam only at the start of a journey/
with the vehicle stationary.
Dynamic automatic headlight range control additionally keeps the dipped beam angle constant when the vehicle
tilt varies as a result of acceleration or deceleration.-
One level sender each at the front and rear axles signals the compression of the vehicle suspension in both
headlight range control systems. A signal proportional to the running speed is additionally processed.
The control unit evaluates these signals and actuates the headlight range controller when the lights are on.
Both headlight range control systems comprise:
◆ Headlight range control unit -J431
◆ Rear left vehicle level sender -G76
◆ Front left vehicle level sender -G78
Electrical system Self-diagnosis 02.99 ➤ - Edition 05.2002
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi A8 1994 ➤
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4.11 - Adaption