With Manufacturer's Scan Tool

Engine Control Module (ECM) to Throttle Valve Control Module, Adaptation


Adaptation teaches the Engine Control Module (ECM) (with ignition switched on and engine not running) the throttle valve control module stop positions and a comparison graph between throttle valve potentiometer and throttle position sensor.

Adapting sequence must be performed if:
- The voltage supply is interrupted
- The throttle valve control module is removed and installed
- The throttle valve control module is replaced
- If when installing another engine another throttle valve control module is installed

Special tools and equipment
VAG1551 Scan Tool (ST) or VAG1552 mobile scan tool with VAG1551/3 adapter cable

Test requirements
- No DTCs stored in DTC memory.
- Battery (B+) voltage at least 11.5 V
- All electrical consumers (e.g. lights and window defroster) switched off
- Throttle valve must be at idle speed position

Work sequence

Test sequence
- Connect VAG1551 (VAG1552) Scan Tool (ST).
- Switch ignition on and press buttons -0- and -1- to insert "Engine Electronics" address word 01.

Indicated on display


Rapid data transfer HELP
Select data function XX


- Press buttons -0- and -4- to select "Basic Setting" function 04 and press -Q- button to confirm input.


Indicated on display


Basic Setting
Input display group number XXX


- Press buttons -0-, -6- and -0- to input display group number 60 (060) and press -Q- button to confirm input.

Indicated on display: (1-4 = display fields)


System in basic setting 60 ->
1 2 3 4


After pressing the -Q- button, the throttle valve position sensor is switched so that it is not supplied with voltage at the start of the test.

In this condition the throttle valve is pulled into an emergency running position by a mechanical spring in the throttle valve control module. The values that both angle sensors provide in the emergency running position are stored by the Engine Control Module (ECM).

Thereafter, the throttle valve is opened a predetermined value. If this value is achieved, the throttle valve is again switched so that it is not supplied with voltage. Now the mechanical spring must pull the throttle valve to the previously learned emergency running position within a predetermined period (spring test).

Then the throttle valve is closed by the throttle valve positioner, and the values, which are supplied by the angle sensors in the throttle valve control module, are stored by the Engine Control Module (ECM).

If the Engine Control Module (ECM) switches the throttle valve position sensor so that it is without voltage during normal operation, it is indicated by an increased and varying idle. The engine reacts slowly to accelerator changes.
- Check specified values (display fields 1-4):

Display Group 060:

- Terminate engine basic setting at earliest after 30 seconds by pressing -> button.

Adaptation has been performed successfully.

To store the values:
- Switch ignition off.


NOTE:
If the basic setting of the control module is interrupted, the cause could be one of the following:
- Throttle valve cannot reach the mechanical stop because of contamination (e.g. oil deposits or an incorrectly adjusted accelerator pedal cable).
- Battery voltage too low.
- Throttle valve control module or wiring is faulty. Refer to "Throttle Valve Control Module, Checking", Testing and Inspection


After an interruption the fault "17973" is stored in DTC memory. When the ignition is switched on again, the basic setting is automatically performed again.
- End basic setting by pressing -> button.
- Press buttons -0- and -6- to select "End Output" function 06 and press -Q- button to confirm input.
- Switch ignition off.