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with respect to the correctness of information in this document. Copyright by AUDI AG.
Note:
Re-entering the function "Final control diagnosis" does not cause the magnetic clutch -N25 to be actuated =>
Page 31 Reading measured value block (display group 001).
- Connect the V.A.G 1527 voltage tester between the earth and the input to be tested (to the engine control
unit) on the test box.
Indicated on display Desired function Fault remedy
Fresh air blower -V2 - Fresh air blower -V2 is actuated for 2
secs. at a time at 0 V, 3 V, 6 V, 9 V, 12 V,
15 V, 0 V, etc.
- => Page 19 .
Keep pressing the ⇒key until "idle control" appears on the display.
Idling speed regulation 2) - The output from operating and display
unit -E87 is switched at 5 second intervals
from 0 V to 12 V (LED in V.A.G 1527
flashes).
- Use current flow diagram to check the
cabling between -E87 and engine control
unit 1).
Renew operating and display unit -E87.
1) Check with the engine control unit installed:
=> Relevant Workshop Manual Injection and Ignition system; Repair group 01
2) Causes an increase in the idle speed or a change in the pilot control value in the engine control unit.
=> Relevant Workshop Manual Injection and Ignition system; Repair group 01
Notes:
◆ The output "increase idle speed" is not actuated if the compressor is switched off manually (during normal
control).
◆ With operating and display units with two displays the output "air conditioner compressor cut-in" is connected
to connector -A- contact -3-.
◆ With operating and display units with one display the output "air conditioner compressor cut-in" is connected
to connector -C- contact -2-.
6 - Basic setting
6.1 - Basic setting
- Connect fault reader V.A.G 1551,
Enter address word 08 "Electronic climate/heating control" and advance the program until "Select function
XX" appears on display => Page 4 onwards.
- Switch on printer by pressing PRINT key (lamp in key lights up).
- Interrogate fault memory =>Page 7 and rectify any faults displayed.
- Erase fault memory =>Page 26 .
- Check coding => Page 27 and correct, if necessary.
-> Indicated on display (function selection):
Rapid data transfer HELP
Select function XX
- Press keys 0 and 4 (04 selects the "Basic setting" function).
-> Indicated on display:
Rapid data transfer Q
04 - Initiate basic setting
- Press Q to confirm entry.
-> Display:
Audi A3 1997 ➤
Heating, Air Conditioner - Edition 06.2000
24 01 - Self-diagnosis, Electrical check
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