Adapting engine control unit to throttle valve control part and exhaust gas recirculation valve — AUDI

During adaption, the engine control unit learns the various positions of the throttle unit and the stops for the EGR valve when the ignition is switched on and the engine is not running. These positions are stored in the control unit.

Adapting sequence must be performed if:

The engine control unit is renewed.
The engine control unit is renewed.
The throttle valve control part has been removed and installed.
The throttle valve control part or the exhaust gas recirculation valve has been renewed.
The engine has been changed and with it a new throttle valve control part or a new exhaust gas recirculation valve has been fitted.

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

Fault reader V.A.G 1551 (or vehicle system tester V.A.G 1552) with cable V.A.G 1551/3

Check conditions

Ignition on, engine not running
No faults must be stored in fault memory
=> Page
01-16
, interrogating fault memory
The battery voltage must be at least 11.5 V.
All electrical consumers, e.g. lights and rear window heating must be switched off
The throttle valve must be at idling speed position (The accelerator must not be operated during the test).
The intake air temperature must be at least 6 °C =>display group 04, display zone 4.
Coolant temperature must be 5...50 °C =>display group 04, display zone 3.

Work sequence

Connect the fault reader V.A.G 1551 (V.A.G 1552). Then switch ignition on and select engine control unit with the "Address word" 01.
(Connecting fault reader and selecting engine control unit => Page
01-7.)

Rapid data transfer
HELP
Select function XXX
Indicated on display:

Press keys 0 and 4 for the function "Introduction of basic setting" and confirm entry with Q key.

Basic setting
Input display group number XXX
Indicated on display:

Press keys 0, 6 and 0 for the "Display group number 60" and confirm entry with Q key.

System in basic setting (60)
⇒ xxx.x % xxx.x % x
ADP. runs
Indicated on display:
(1...4 = display zones)

After pressing the Q key, the following learning steps will be performed:

Learning step 1: The engine control unit checks if all test conditions are fulfilled.

Learning step 2: The throttle valve part is switched to no voltage (emergency operation position). The angle sender values of the emergency operation position are stored in engine control unit.
Learning step 3: The throttle valve is set to a value above the emergency operation point.
Learning step 4: The final stage of the throttle valve positioner is switched off. Now the mechanical spring must set the throttle valve to the previously learnt emergency operation position within a certain time (spring closing test).
Learning step 5: The throttle valve is closed by the throttle valve positioner (lower mechanical stop).
Learning step 6: The angle sender values from the lower mechanical stop are stored in the engine control unit. On this basis, the lower electronic stop is then defined (calculated) and stored in the control unit.
Learning step 7: The final stage is switched off at the lower mechanical stop. Now the mechanical spring must set the throttle valve in the emergency operation position (spring opening test).

Learning step 8: The sender angle values are checked.

System in basic setting (60)
⇒ xx.x % xx.x % x
ADP. OK
Indicated on display:
(1...4 = display zones)

Adapting has been performed successfully.

End basic setting of throttle valve control part by pressing⇒ key.
Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.

To store the values:

Switch off ignition for at least 50 seconds (control unit run-on).

If the basic setting of the control unit is interrupted, the cause could be one of the following:

The test conditions were not fulfilled.
Throttle valve control unit or wiring is defective. Check => Page
24-34.

After an interruption a fault is stored in fault memory. When next switching on ignition the basic setting is automatically performed again.