Audi A3 1997 - Checking in Vehicles with an Operating and Display Unit with One Display

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Select measuring range on hand-held multimeter V.A.G 1526:
Current measurement (20 A =)
- Adapter cable V.A.G 1598/11 connected
Test step V.A.G 1598
socket
Testing of ▪ Test conditions
- Additional opera‐
tions
Specified value Remedies if speci‐
fied value not at‐
tained
6.2 10
and
14
Actuation of radiator
fan -V7 (speed 2)
▪ Engine running - less than 1 A.
Fan running at
speed 2.
- Use current flow di‐
agram to locate and
eliminate open cir‐
cuit or short to posi‐
tive or earth in the
wiring between -E87
and control unit -
J293.
Use current flow di‐
agram to locate and
eliminate open cir‐
cuit in the wiring be‐
tween control unit -
J293 and fans -V7.
(cont.)
▼
Test step V.A.G 1598
socket
Testing of ▪ Test conditions
- Additional oper‐
ations
Specified value Remedies if specified
value not attained
Select measuring range on hand-held multimeter V.A.G 1526:
Current measurement (20 A =)
- Adapter cable V.A.G 1598/11 connected
6.2
(cont.)
10
and
14
Actuation of radiator
fan -V7 (speed 2)
▪ Engine running - less than 1 A.
Fan running at
speed 2.
- Check actuation of
control unit -J293
(=>Page 70 ).
Check radiator fan -
V7.
=> Current Flow Dia‐
grams, Electrical
Fault-Finding and Fit‐
ting Locations
10.4 - Checking in vehicles with an operating and display unit with one display
List of envisaged electrical checks (at operating and display unit -E87)
Test step Component tested Page
1 - Power supply, earth connection and illumination of operating and display unit -E87.
Signal for ignition off time
61
2 - Temperature sensors/senders (-G17, -G56, -G89, -G192). 63
3 - Fresh air blower with corresponding control unit (-V2, -J126). 64
4 - Positioning motors for air conditioner and corresponding potentiometers
(-V68/-G92, -V70/-G112, -V71/-G113, -V85/-G114).
65
5 - Pressure signal from radiator fan control unit -J293.
"Air conditioner compressor cut-in" output
Signal "Engine temperature too high".
66
Audi A3 1997 ➤
Heating, Air Conditioner - Edition 06.2000
60 01 - Self-diagnosis, Electrical check