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.
Select measuring range on hand-held multimeter V.A.G 1526:
Resistance measurement (200 ω)
- Adapter cable V.A.G 1598/12 connected
Test step V.A.G 1598
socket
Testing of ▪ Test conditions
- Additional opera‐
tions
Specified value Remedies if specified
value not attained
4.4 4
and
12
Central flap position‐
ing motor -V70
- 20 ωto 100ω. - Use current flow di‐
agram to locate and
eliminate open circuit,
contact resistance or
short circuit
4.5 5
and
13
Air flow flap position‐
ing motor -V71
- 20 ωto 100ω.
- Replace positioning
motor
4.6 3
and
11
Footwell/defroster
flap positioning mo‐
tor -V85
- 20 ωto 100ω.
Test step 5
Pressure switch -F129 / signal from radiator fan control unit -J293, "AC compressor cut-in" output, "engine
temperature too high" signal and temperature sensor blower -V42
Notes:
◆ High-pressure sensor -G65 will gradually replace air conditioner pressure switch -F129 (as of model year
1999, initially vehicles with 1.6 l engines).
◆ Test step 5.1 must be implemented only for vehicles with pressure switch -F129.
◆ Test steps 5.2 to 5.5 are identical for vehicles with pressure switch -F129 and high-pressure sensor -G65.
◆ Test step 5.6 must be implemented only for vehicles with high-pressure sensor -G65.
Select measuring range on hand-held multimeter V.A.G 1526:
Resistance measurement (200 ω)
- Adapter cable V.A.G 1598/11 connected
Test step V.A.G 1598
socket
Testing of ▪ Test conditions
- Additional opera‐
tions
Specified value Remedies if specified
value not attained
5.1 2
and
42
Air conditioner pres‐
sure switch -F129
(switch between the
contacts 1 and 2)
▪ Ignition off. - Less than 20 ω - Use current flow dia‐
gram to locate and
eliminate open circuit
or contact resistance.
Check pressure switch
-F129 (=>Seite 135 ).
Notes:
◆ Test step 5.1 must be implemented only for vehicles with pressure switch -F129.
◆ If code 1 "pressure switch -F129 open" is displayed in measured value block 1 as a compressor shutoff
criterion:
- Also use current flow diagram to check the wiring to -F129 for a loose contact.
- Check the actuation of the radiator fan -V7 speed 1 (=>Final control diagnosis, Page 18 ).
- Check AC pressure switch -F129 (switch between contacts 3 and 4, actuation of radiator fan
-V7 speed 2) (=>Page 135 ).
Audi A3 1997 ➤
Heating, Air Conditioner - Edition 06.2000
10.3 - Test in vehicles with an operating and display unit with two displays 55
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