Audi A3 1997 Manual page 85

Select measuring range on hand-held multimeter V.A.G 1526:
Voltage measurement (20V =)
Test step Contact at
connector
to -J293
2.1 Connector
B contact 2
and
connector
A, contact 6
Select measuring range on hand-held multimeter V.A.G 1526:
Voltage measurement (20V =)
Test step Contact at
connector
to -J293
2.2 Connector
A contact 7
and
connector
A, contact 6
Notes:
◆ Test step 2.2 is only to be performed in vehicles without map-controlled engine cooling.
◆ In vehicles with map-controlled cooling the radiator fans are switched on and off by the engine control unit
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
dependent on the engine load and the refrigerant temperature (temperature switch -F18/-F54 is not instal‐
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. led).
Testing of ▪ Test conditions
- Additional opera‐
tions
"Fan ON" signal (1st ▪ Connector de‐
speed) from temper‐ tached from tem‐
ature switch -F54. perature switch -
▪ only to be per‐ F18/-F54, and con‐
formed in vehicles tacts 1 and 2 jum‐
without map-control‐ pered
led cooling ▪ Ignition on.
Testing of ▪ Test conditions
- Additional opera‐
tions
"Fan ON" signal (2nd ▪ Connector de‐
speed) from temper‐ tached from tem‐
ature switch -F18. perature switch -
▪ only to be per‐ F18/-F54, and con‐
formed in vehicles tacts 2 and 3 jum‐
without map-control‐ pered
led cooling ▪ Ignition on.
11.3 - Electrical check at control unit -J293 (version for High-pressure sensor -G65)
Heating, Air Conditioner - Edition 06.2000
Specified value
- approx. battery
voltage
Radiator fan run‐
ning at speed 1
Specified value
- approx. battery
voltage
Audi A3 1997 ➤
Remedies if speci‐
fied value not at‐
tained
- Use current flow di‐
agram to rectify volt‐
age supply to tem‐
perature switch -
F54.
Use current flow di‐
agram to locate and
eliminate open cir‐
cuit in the wiring be‐
tween temperature
switch -F54 and
control unit -J293.
Use current flow di‐
agram to locate and
eliminate open cir‐
cuit in the wiring to
fans -V7.
Service radiator fan
-V7.
Remedies if speci‐
fied value not at‐
tained
- Use current flow di‐
agram to rectify volt‐
age supply to tem‐
perature switch -
F18.
Use current flow di‐
agram to locate and
eliminate open cir‐
cuit in the wiring be‐
tween temperature
switch -F18 and
control unit -J293.
79