Audi A3 1997 Manual page 59

Test step 3
Fresh air blower -V2 and relevant control unit -J216
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
3.1
earth
3.2
earth
3.3
earth
Note:
Earth applied e.g. to connector D contact 15.
Voltage tester V.A.G 1527,
- Adapter cable V.A.G 1598/11 connected
Test step V.A.G 1598
socket
3.4
and
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Testing of
16 Control unit -J126
and
14 Power supply for
and fresh air blower -V2
11 Power supply for
and control unit -J126
(via fresh air blower
-V2)
Testing of
14 Control unit -J126 ▪ Ignition on.
16
Heating, Air Conditioner - Edition 06.2000
▪ Test conditions
- Additional opera‐
tions
▪ Ignition on - Voltage less than 5
V
Fresh air blower not
running
▪ Ignition on - approx. battery
voltage
▪ Ignition on - approx. battery
voltage
▪ Test conditions
- Additional opera‐
tions
- LED in voltage test‐
er lights up
- Fresh air blower is
running
10.3 - Test in vehicles with an operating and display unit with two displays
Audi A3 1997 ➤
Specified value Remedies if speci‐
fied value not at‐
- Use current flow di‐
agram to locate and
eliminate short to
positive in the wiring
between -J126 and -
E87.
Replace control unit
-J126.
- Use current flow di‐
agram to repair pow‐
er supply.
- Use current flow di‐
agram to repair pow‐
er supply.
Specified value Remedies if specified
value not attained
- Use current flow di‐
agram to locate and
eliminate open circuit
in the wiring between
-J126 and -E87.
Find open circuit in
earth wiring to -J126
and eliminate.
Check freedom of
movement of fresh
air blower -V2.
- Replace control unit
-J126.
tained
53