Audi A3 1997 Manual page 80

Audi A3 1997 ➤
Heating, Air Conditioner - Edition 06.2000
Select measuring range on hand-held multimeter V.A.G 1526:
Voltage measurement (20V =)
Test step Contact at
connector
to -J293
2.4 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
2.5 Connector
A contact 7
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
2.6 Connector
A
and
connector B
attached to
-J293
74
01 - Self-diagnosis, Electrical check
Testing of ▪ Test conditions
- Additional opera‐
tions
"Fan ON" signal ▪ Connector de‐
from -E87 (1st tached from temper‐
speed from temper‐ ature switch -F18/-
ature switch -F54). F54, and contacts 1
and 2 jumpered
▪ Ignition on.
Testing of ▪ Test conditions
- Additional opera‐
tions
"Fan ON" signal ▪ Connector de‐
from -E87 (2nd tached from temper‐
speed from temper‐ ature switch -F18/-
ature switch -F18). F54, and contacts 2
and 3 jumpered
▪ Ignition on.
Testing of ▪ Test conditions
- Additional opera‐
tions
"Fan ON" signal ▪ Connector de‐
from -E87 (2nd tached from temper‐
speed from temper‐ ature switch -F18/-
ature switch -F18). F54, and contacts 2
and 3 jumpered
▪ Ignition on.
Specified value
- approx. battery
voltage
Radiator fan running
at speed 1
Specified value
- approx. battery
voltage
Specified value
- Radiator fan run‐
ning at speed 2
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.
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.
Remedies if speci‐
fied value not at‐
tained
- Use current flow di‐
agram to locate and
eliminate open cir‐
cuit in the wiring to
fans -V7.
Service radiator fan
-V7.
Control unit -J293
defective - replace.