Audi A3 1997 Manual page 55

Test step
5 - Air conditioner pressure switch -F129 /
Signal from control unit for radiator fan -J293.
Temperature sensor blower -V42.
"Air conditioner compressor cut-in" output.
Signal "Engine temperature too high".
6 - Actuation of air conditioner magnetic clutch -N25.
Actuation of radiator fan -V7
Test step 1
Power supply, earth connection and illumination of operating and display unit -E87.
Select measuring range on hand-held multimeter V.A.G 1526:
Voltage measurement (20V =)
- Adapter cable V.A.G 1598/12 connected
Test step V.A.G 1598
socket
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1.1 9
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
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15
Select measuring range on hand-held multimeter V.A.G 1526:
Voltage measurement (20V =)
- Adapter cable V.A.G 1598/11 connected
1.2 7 and
earth
Notes:
◆ Test steps 1.3 to 1.5 must be implemented only for model year 1997 vehicles (operating and display unit
with part no. 8L0 820 043 up to and including index "C").
◆ Earth applied e.g. to connector D contact 15.
Select measuring range on hand-held multimeter V.A.G 1526:
Voltage measurement (20V =)
- Adapter cable V.A.G 1598/11 connected
Test step V.A.G 1598
socket
1.3 7 and
earth
1.4 45 and
earth
Component tested
Testing of ▪ Test conditions
- Additional opera‐
tions
Terminal 15 and ▪ Ignition on
earth connection
on -E87
Terminal 58 on - ▪ Ignition on.
E87 ▪ Switch side lights
on
Testing of ▪ Test conditions
- Additional opera‐
tions
Terminal 58 on - ▪ Ignition on
E87 ▪ Side lights off
Terminal 58d on - ▪ Ignition on
E87 ▪ Side lights on
10.3 - Test in vehicles with an operating and display unit with two displays
Heating, Air Conditioner - Edition 06.2000
Specified value
- Approx. battery
voltage
- Approx. battery
voltage
Specified value
- less than 2 V
- 0 to 12 V (regard‐
less of the illumina‐
tion control setting)
Audi A3 1997 ➤
Page
Remedies if speci‐
fied value not at‐
tained
- Use current flow di‐
agram to repair
power supply and/or
earth connection
- Use current flow di‐
agram to repair
power supply
Remedies if speci‐
fied value not at‐
tained
- Use the current
flow diagram to rec‐
tify short to positive
- Use current flow di‐
agram to locate and
eliminate open cir‐
cuit or short circuit
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