Audi A3 1997 Manual page 63

Voltage tester V.A.G 1527,
Operating and display unit connected to the test box (adapter cable V.A.G 1598/11 and /12)
- Adapter cable V.A.G 1598/11 connected
Test step V.A.G 1598
socket
5.4 14
and
12
Select measuring range on hand-held multimeter V.A.G 1526:
Current measurement (200 mA =)
Operating and display unit connected to the test box (adapter cable V.A.G 1598/11 and /12)
- Adapter cable V.A,G 1598/11 connected.
Test step V.A.G 1598
socket
5.5 Earth
and
12
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
5.6 2
and
earth
Notes:
◆ Test step 5.6 must be implemented only for vehicles with high-pressure sensor -G65.
◆ Earth applied e.g. to connector D contact 15.
◆ Depending on high-pressure sensor -G65 signal, radiator fan control unit -J293:
Testing of ▪ Test conditions
- Additional opera‐
tions
"Air conditioner ▪ Engine running
compressor cut-in" ▪ Compressor
output switched off (frost
symbol in the display
zone of -E87 is not
illuminated).
Switch on compres‐
sor.
Testing of ▪ Test conditions
- Additional opera‐
tions
"Air conditioner ▪ Engine running
compressor cut-in" ▪ Compressor
output switched off.
Switch on compres‐
sor.
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Testing of ▪ Test conditions
- Additional opera‐
tions
Signal from radia‐ ▪ Ignition on.
tor fan control unit
-J293 (in vehicles
with high-pressure
sensor -G65)
10.3 - Test in vehicles with an operating and display unit with two displays
Heating, Air Conditioner - Edition 06.2000
Specified value
- LED in voltage
tester lights up.
LED in voltage test‐
er lights up a little
less brightly.
Specified value
- Less than 5 mA
Less than 50 mA
Compressor is not
switched on.
Specified value
- approx. battery
voltage
Audi A3 1997 ➤
Remedies if speci‐
fied value not at‐
tained
- Use current flow di‐
agram to locate and
eliminate open cir‐
cuit or short circuit.
Rectify AC com‐
pressor shutoff con‐
dition in the engine
control (emergency
operation).
Rectify AC shutoff
condition in the au‐
tomatic gearbox
control unit -J217.
Use the current flow
diagram to locate
and rectify short to
earth.
Remedies if specified
value not attained
- Use current flow di‐
agram to locate and
eliminate short circuit.
Check actuation of
control unit -J293
(=>Page 70 ).
Renew operating and
display unit -E87.
Remedies if specified
value not attained
- Use current flow dia‐
gram to locate and
eliminate open circuit
or contact resistance.
Check high-pressure
sensor (=>Page
85 ).
57