Audi A3 1997 Manual page 84

Audi A3 1997 ➤
Heating, Air Conditioner - Edition 06.2000
Note:
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 installed).
Test step 1 (voltage supply)
Select measuring range on hand-held multimeter V.A.G 1526:
Voltage measurement (20V =)
Test step Contact at
connector to
-J293
1.1 Connector B
contact 3
and
connector A,
contact 6
1.2 Connector B
contact 1
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
1.3 Connector A
contact 4
and
connector A,
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
contact 6
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
1.4 with respect to the correctness of information in this document. Copyright by AUDI AG. Connector A
contact 9
and
connector A,
contact 6
Test step 2 (actuation of radiator fan)
Notes:
◆ Test steps 2.1, 2.2 and 2.3 are only carried out in vehicles without map-controlled engine cooling.
◆ The test step 2.4 is only carried out in vehicles with diesel engine (performance 81 KW) (actuation for radiator
fan run out).
◆ The test steps 2.5 and 2.6 are only carried out in vehicles with 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).
◆ If a fault is found in vehicles with map-controlled engine cooling when the radiator fan is actuated or if the
actuation of the fan is to be checked proceed as described in the workshop manual Ignition and Injection
system for this engine.
=> Relevant Workshop Manual Injection and Ignition system
78
01 - Self-diagnosis, Electrical check
Testing of ▪ Test conditions
- Additional opera‐
tions
Voltage supply
Voltage supply
Testing of ▪ Test conditions
- Additional opera‐
tions
Voltage supply
Voltage supply ▪ Ignition on.
Specified value
- approx. battery volt‐
age
- approx. battery volt‐
age
Specified value
- approx. battery volt‐
age
- approx. battery volt‐
age
Remedies if specified
value not attained
- Use current flow dia‐
gram to repair power
supply and/or earth
connection.
- Use current flow dia‐
gram to repair power
supply.
Remedies if specified
value not attained
- Use current flow dia‐
gram to repair power
supply.
- Use current flow dia‐
gram to repair power
supply.