Audi A3 1997 Manual page 25

-> Indicated on display:
Function unknown or cannot
be executed at present
-
End
If one of these messages appears on the display (after actuation of last control element) the final control
diagnosis is completed.
- Press ⇒key.
Indicated on display
DANGER: Fan is switched on - Info display
AC magnetic clutch -N25
Indicated on display
Radiator fan -V7 is also actuated. - Fan -V7 (1st speed) is
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Notes:
with respect to the correctness of information in this document. Copyright by AUDI AG.
◆ Radiator fan -V7 is automatically switched on together with the magnetic clutch in vehicles with pressure
switch for air conditioner -F129.
◆ Control unit -J293, installed in vehicles with high-pressure sensor -G65, is available in 2 designs.
- In design "1" the radiator fan is automatically switched on in conjunction with the compressor (the first fan
speed is activated regardless of the pressure in the refrigerant circuit).
- In design "2" the compressor is switched on without actuation of the radiator fan; the first
fan speed is only activated once the pressure in the refrigerant circuit exceeds 12 bar.
◆ The radiator fan is switched to 2nd speed by control unit -J293:
Heating, Air Conditioner - Edition 06.2000
Desired function
IMPORTANT
Radiator fan -V7 is switched on when
⇒button is next pressed.
Do not reach into the fan area.
- Air conditioner magnetic clutch -N25
clicks in
2 sec. cycle, the compressor is driven.
Operating and display unit -E87 output
is switched from 0 V to 12 V in 2 sec.
intervals.
Desired function
switched on and off at 2 sec. inter‐
vals.
Audi A3 1997 ➤
Fault remedy
- Use current flow diagram to check the
power supply for magnetic clutch -N25
(via control unit -J293).
Repairing the air conditioner magnetic
clutch -N25
(=>Page 139 ).
Use current flow diagram to check the
wiring between -E87,-F129, -J293 and
-N25.
Renew operating and display unit -E87.
(cont.)
▼
Fault remedy
- Use current flow diagram to check
the wiring between -E87 and radiator
fan control unit -J293 for open circuit
or short to positive.
Check actuation of fan -V7 from con‐
trol unit -J293 1).
=> Current Flow Diagrams, Electrical
Fault-Finding and Fitting Locations
Check functionality of control unit -
J293 (=> Electrical check, Page
46 ).
5.1 - Final control diagnosis
19