Audi A3 1997 Manual page 75

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
6.1 15
and
4
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
6.1 (15
(cont.) and
4)
Notes:
◆ Control unit -J293, installed in vehicles with high-pressure sensor -G65, is available in 2 designs.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
- In design "1" the radiator fan is automatically switched on in conjunction with the compressor (the first fan
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
speed
with respect to the correctness of information in this document. Copyright by AUDI AG.
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.
Testing of ▪ Test conditions
- Additional opera‐
tions
Actuation of radia‐ ▪ Engine running - Less than 1 A
tor fan -V7
Testing of ▪ Test conditions
- Additional oper‐
ations
Actuation of air ▪ Engine running - Compressor is
conditioner mag‐
netic clutch -N25
10.4 - Checking in vehicles with an operating and display unit with one display
Heating, Air Conditioner - Edition 06.2000
Specified value
Radiator fan -V7
running at speed 1
(observe relevant
notes)
Specified value
driven.
Audi A3 1997 ➤
Remedies if specified
value not attained
- 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.)
▼
Remedies if specified
value not attained
- 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.
69