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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.
Test step 3 (actuation of magnetic clutch)
Select measuring range on hand-held multimeter V.A.G 1526:
Voltage measurement (20V =)
Test step Contact at
connector
to -J293
Testing of ▪ Test conditions
- Additional opera‐
tions
Specified value Remedies if specified
value not attained
3.1 Connector
A contact 8
and
connector
A, contact 6
"Compressor ON"
signal from -E87
▪ Engine running
▪ Operating and dis‐
play unit -E87 in
"auto" mode (com‐
pressor on)
▪ No compressor
shutoff condition is
displayed in the -
E87 measured val‐
ue block (display
group 001).
- approx. battery
voltage
- Use current flow di‐
agram to locate and
eliminate open circuit
or short to positive or
earth in the wiring be‐
tween pressure
switch -F129, temper‐
ature switch -F14 and
control unit -J293.
Refrigerant tempera‐
ture switch -F14 de‐
fective (open) or re‐
frigerant too hot -
check.
=> Current Flow Dia‐
grams, Electrical
Fault-Finding and Fit‐
ting Locations
Select measuring range on hand-held multimeter V.A.G 1526:
Current measurement (20 A=)
Test step Contact at
connector to
-J293
Testing of ▪ Test conditions
- Additional opera‐
tions
Specified value Remedies if specified
value not attained
3.2 Connector A
contact 4
and
connector A,
contact10
Actuation of air con‐
ditioner magnetic
clutch -N25
▪ Ignition on. - Less than 10 A
Magnetic clutch
clicks (when apply‐
ing voltage)
- Use current flow di‐
agram to locate and
eliminate open circuit
or short to earth in the
wiring between con‐
trol unit -J293 and
magnetic clutch -N25.
Open circuit in the
earth connection to
magnetic clutch -N25
=> Current Flow Dia‐
grams, Electrical
Fault-Finding and Fit‐
ting Locations
Magnetic clutch de‐
fective - rectify.
Audi A3 1997 ➤
Heating, Air Conditioner - Edition 06.2000
11.2 - Electrical check at control unit -J293 (version for pressure switch -F129) 75
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