Audi A1 2011 ➤ , Audi A1 Sportback 2018 ➤ , Audi A2 2001 ➤ , Audi A3 20 ...
Electrical Equipment General Information - Edition 08.2019
♦ Observe the current notes in the corresponding repair manual
for all repairs.
♦ Observe country-specific regulations.
♦ Before working on the electrical system, the battery Ground
(GND) cable must be disconnected. By disconnecting the bat‐
tery GND cable (current disruption), the electrical system is
guaranteed to be safe to work on. Disconnecting the positive
battery cable is only required when removing the battery.
♦ Before starting a repair, the cause of the damage must be
eliminated first (for example sharp edges on chassis parts,
faulty electrical consumers, corrosion etc.).
♦ For the wiring harnesses if possible a high quality replacement
part is always delivered. This means that previously not re‐
quired connector housings may be present on the replace‐
ment part.
♦ Additionally bend back the non-necessary connector housing
when possible in a dry area of the vehicle and route them so
that no noises can result.
♦ Additionally to prevent capillary action seal the non-necessary
connector housing and single wires in wet areas of the vehicle
with water tight heat-shrinkable tube. The necessary compo‐
nents to seal the single wires can be found in the Parts
Catalog.
♦ Further information, for example, installing and removing the
individual components, can be found in the appropriate Repair
Manual.
♦ Soldering is not permissible for repairs to the vehicle electrical
system.
♦ Wiring harness and connector repairs on the vehicle electrical
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
system may only be performed using -VAS1978B- and previ‐
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
ous versions such as the -VAS631001- and the -VAS631003- .
Only use the yellow wirewsithfrroesmpectthtoethceocorrrreecstnpeossnodf iinnfogrmwatiiorinningthhisadro‐cument. Copyright by AUDI AG.
ness-repair kit.
♦ Wiring harness repairs may not be performed again in the
wrapping of the vehicle-specific wiring harness and are to be
marked with yellow adhesive tape. This indicated a previous
repair.
♦ Pinch and butt connectors must not be repaired. If necessary,
lay a wire parallel to the faulty wire. After crimping, crimp con‐
nections must be heat-shrunk using hot air gun to prevent
moisture penetration. Connectors with corresponding heat-
shrinkable tube must be protected moisture penetration.
♦ Always observe the supplementary notes for repairing wiring
harnesses on airbag- and seat belt tensioner systems, fiber
optic cables, CAN bus lines, FlexRay wires, and antenna
wires.
♦ A function test must be performed after every repair. If nec‐
essary, check Diagnostic Trouble Code (DTC) memory, erase
and/or bring systems into basic setting.
♦ If possible, do not loosen grounding straps from the body
(danger of corrosion).
♦ Not all wire cross-sections in the vehicle are contained in the
-VAS1978B- and its previous versions. If the required wire
cross-section is not present, the next greater cross-section
must be used.
2. Wiring Harness and Connector Repairs
101
English 
