ECM to Throttle Valve Control Module, Adapting

Engine Control Module (ECM) to throttle valve control module, adaptation

Adaptation teaches the Engine Control Module (ECM) (with ignition turned 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
VAG 1551 Scan Tool (ST) or VAG 1552 mobile scan tool with VAG 1551/3 adapter cable

Test requirements

- No DTCs stored in DTC memory.
- Battery (B+) voltage at least 11.5 V
- Turn off all electrical consumers (e.g. lights and window defroster)
- Throttle valve must be at idle speed position
- Cruise control system functioning correctly (if installed)

Test sequence

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

Indicated on display

Rapid data transfer HELP
Select 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-, -9- and -8- to input display group number 98 (098) and press -Q- button to confirm input.

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

System in basic setting 98 ->
1 2 3 4

After pressing the Q- button, the throttle position sensor is driven to Min., Max. and some intermediate positions, and the relevant throttle valve angles are stored in permanent memory. This procedure takes a max. of 10 secs. The throttle valve then remains in the start position for a brief period before closing.

- Check specified values (display fields 1-4):

Display Group 98:

- Terminate engine basic setting after minimum of 30 seconds by pressing -> button.

To store values:
- Turn off ignition.

NOTE:
If the basic setting of the control module is interrupted, one of the following conditions may be the cause:
- 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.

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.