Audi A8 1994 - Connecting Vehicle Diagnostic, Testing and Information System VAS 5051; Safety Precautions

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
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.
Voltage supply term. 15
▪ 0 ... 15 V
Display group 002
Read measured value block 2
⇒
◂ Indicated on display
X.XXX V X.XXX V XXX% X.XX s
Time constant in s (indicates the time after which
the headlights have reached 63 % of their adjust‐
ment.)
▪ 0 ... 2 s
Positioning motor specification (indicates by what percentage the headlight
range control positioning motor spindle is extended at the zero position.)
▪ 0 ... 100 %
Rear level sender voltage with vehicle at standstill
▪ 0.5 ... 4.5 V
Front level sender voltage with vehicle at standstill
▪ 1.56 ... 3.45 V
6 - Connecting vehicle diagnostic, testing and information system VAS 5051
6.1 - Connecting vehicle diagnostic, testing and information system VAS 5051
6.2 - Safety precautions
Pay attention to the following if testers and measuring instruments have to be used in the course of a test drive:
Attention:
◆ Proceed as follows during measurement and test drives so as to avoid the risk of accident:
◆ Exclusive use is to be made of VAS 5051 or V.A.G 1551 for reading the measured value blocks. The devices
must be attached to the rear seat and operated from there by a second person.
Heed the following so as to avoid possible injury and/or the destruction of electrical and electronic components:
◆ Switch off ignition before disconnecting and connecting measuring instruments and testers.
◆ Certain tests may lead to a fault being detected by the control unit and stored. The fault memory is therefore
to be interrogated and if necessary erased on completion of all tests and repair work.
◆ Always switch off ignition before disconnecting and connecting battery so as not to damage electronic control
units.
Test requirements:
• Battery voltage at least 12.7 V
• Earth connections to engine and gearbox OK
• Battery earthing strap, if fitted, and earthing strap between battery and gearbox OK
Audi A8 1994 ➤
Electrical system Self-diagnosis 02.99 ➤ - Edition 05.2002
162 01 - Self-diagnosis