Audi A3 1997 - Page 84

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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
Testing of ▪ Test conditions
- Additional opera‐
tions
Specified value Remedies if specified
value not attained
1.1 Connector B
contact 3
and
connector A,
contact 6
Voltage supply - approx. battery volt‐
age
- Use current flow dia‐
gram to repair power
supply and/or earth
connection.
1.2 Connector B
contact 1
and
connector A,
contact 6
Voltage supply - approx. battery volt‐
age
- Use current flow dia‐
gram to repair power
supply.
Select measuring range on hand-held multimeter V.A.G 1526:
Voltage measurement (20V =)
Test step Contact at
connector to
-J293
Testing of ▪ Test conditions
- Additional opera‐
tions
Specified value Remedies if specified
value not attained
1.3 Connector A
contact 4
and
connector A,
contact 6
Voltage supply - approx. battery volt‐
age
- Use current flow dia‐
gram to repair power
supply.
1.4 Connector A
contact 9
and
connector A,
contact 6
Voltage supply ▪ Ignition on. - approx. battery volt‐
age
- Use current flow dia‐
gram to repair power
supply.
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
Audi A3 1997 ➤
Heating, Air Conditioner - Edition 06.2000
78 01 - Self-diagnosis, Electrical check