Audi A3 1997 Manual page 86

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
2.3 Connector
A
and
connector
B attached
to -J293
Notes:
◆ The test step 2.3 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
dependent on the engine load and the refrigerant temperature (temperature switch -F18/-F54 is not instal‐
led).
Select measuring range on hand-held multimeter V.A.G 1526:
Voltage measurement (20V =)
Test step Contact at
connector
to -J293
2.4 Connector
A contact
11
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
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
A contact
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
11
with respect to the correctness of information in this document. Copyright by AUDI AG.
and
connector
A, contact 6
Notes:
◆ The test step 2.5 is only to be performed in vehicles with map-controlled engine cooling.
80
01 - Self-diagnosis, Electrical check
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.
Testing of ▪ Test conditions
- Additional opera‐
tions
Fan on signal (vent ▪ Ignition on.
run out) from engine Actuate this control
control unit. element in the final
▪ only to be per‐ control diagnosis for
formed in vehicles the engine control
with 81 KW diesel unit.
engine => Relevant Work‐
shop Manual Diesel
Direct Injection and
Preglow system
Testing of ▪ Test conditions
- Additional opera‐
tions
Fan on Signal (fan ▪ Ignition on.
actuation speed 1) Actuate this control
from engine control element in the final
unit. control diagnosis for
▪ only to be per‐ the engine control
formed in vehicles unit.
with map-controlled => Relevant Work‐
engine cooling shop Manual Injec‐
tion and Ignition
system
Specified value Remedies if speci‐
fied value not at‐
- Radiator fan run‐ - Use current flow di‐
ning at speed 2 agram to locate and
eliminate open cir‐
cuit in the wiring to
fans -V7.
Service radiator fan
-V7.
Control unit -J293
defective - replace.
Specified value Remedies if speci‐
fied value not at‐
- approx. battery - Check output at
voltage during the engine control unit.
actuation Use current flow di‐
agram to locate and
eliminate open cir‐
cuit or short to posi‐
tive or earth in the
wiring between -
E87 and control unit
-J293.
Specified value Remedies if speci‐
fied value not at‐
- approx. battery - Check output at
voltage during the engine control unit.
actuation Use current flow di‐
agram to locate and
eliminate open cir‐
cuit or short to earth
in the wiring be‐
tween engine con‐
trol unit and control
unit -J293.
tained
tained
tained