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Test step 6
Radiator fan actuation -V7, magnetic clutch actuation -N25
Select measuring range on hand-held multimeter V.A.G 1526:
Current measurement (20 A =)
- 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
6.1 15
and
4
Actuation of radia‐
tor fan -V7
▪ Engine running - Less than 1 A
Radiator fan -V7
running at speed 1
(observe relevant
notes)
- Use current flow dia‐
gram to locate and
eliminate open circuit
or short to positive or
earth in the wiring be‐
tween -J293 and -E87.
Check actuation of
control unit -J293
(=>Page 70 ).
Control unit -J293 de‐
fective - replace.
(cont.)
▼
Select measuring range on hand-held multimeter V.A.G 1526:
Current measurement (20 A =)
- Adapter cable V.A.G 1598/11 connected
Test step V.A.G 1598
socket
Testing of ▪ Test conditions
- Additional oper‐
ations
Specified value Remedies if specified
value not attained
6.1
(cont.)
(15
and
4)
Actuation of air
conditioner mag‐
netic clutch -N25
▪ Engine running - Compressor is
driven.
- Use current flow dia‐
gram to locate and
eliminate open circuit
or short to positive or
earth in the wiring be‐
tween -E87 and -
J293.
Check actuation of
control unit -J293
(=>Page 70 ).
Control unit -J293 de‐
fective - replace.
Notes:
◆ Control unit -J293, installed in vehicles with high-pressure sensor -G65, is available in 2 designs.
- In design "1" the radiator fan is automatically switched on in conjunction with the compressor (the first fan
speed
is activated regardless of the pressure in the refrigerant circuit).
- In design "2" the compressor is switched on without actuation of the radiator fan; the first
fan speed is only activated once the pressure in the refrigerant circuit exceeds 12 bar.
Audi A3 1997 ➤
Heating, Air Conditioner - Edition 06.2000
10.4 - Checking in vehicles with an operating and display unit with one display 69
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