GF30.20-P-2021CY Component Description For the Throttle Valve Actuator

GF30.20-P-2021CY Component Description For The Throttle Valve Actuator
- ENGINE 272.911 in MODEL 204.0 up to Model Year 8
- ENGINE 272.921 in MODEL 204.0 /2 up to Model Year 8
- ENGINE 272.947 in MODEL 204.0 /2 up to Model Year 8
- ENGINE 272.948 in MODEL 204.0 up to Model Year 8
- ENGINE 272.961 in MODEL 204.0 /2 up to Model Year 8
- ENGINE 272.971 in MODEL 204.0 up to Model Year 8

Location





M16/6 Throttle valve actuator

The throttle valve actuator it located at the rear on the variable intake manifold.

Task
The throttle valve actuator regulates the functions:
- Idle speed
- Driving mode (according to accelerator pedal position and engine load)
- Cruise control mode
- Electronic accelerator emergency mode





Design
1 Throttle valve
2 Return spring
3 Mechanical stop
4 Actuator motor transmission
5 Setting shaft throttle valve
M16/6m1 Actuator motor
M16/6r3 Sliding contact 1 actual value potentiometer
M16/6r4 Sliding contact 2 actual value potentiometer





Function
1 Pin 1 Actuator motor ground
2 Pin 2 Potentiometer ground
3 Pin 3 Potentiometer voltage
4 Pin 4 Actuator motor voltage
5 Pin 5 Potentiometer signal 2
6 Pin 6 Potentiometer signal 1
M16/6 Throttle valve actuator
M16/6m1 Actuator motor
M16/6r3 Sliding contact 1 actual value potentiometer
M16/6r4 Sliding contact 2 actual value potentiometer

The actuator motor in the throttle valve actuator adjusts the opening angle of the throttle valve continuously from approx. 0 to 90° according to the presets from the ME-SFI [ME] control unit (N3/10).
The two actual value potentiometers operating in opposite directions inform the ME-SFI [ME] control unit about the current position of the throttle valve.

In a deenergized state (e.g limp-home), the opening angle of the throttle valve (from 10 to 12°) is determined by the e return spring (limp-home position).

The throttle valve actuator performs checking of its return spring for ignition ON under the following conditions:
- Drive position P or N engaged (with automatic transmission 722.9)
- Vehicle at rest
- Engine OFF
- Coolant temperature between 5 and 100°C
- Accelerator not operated

For first time connection of a throttle valve actuator to the vehicle, the ME-SFI [ME] control unit automatically executes adaptation of the throttle valve actuator.

Adaptation is executed within about 60 seconds after first energization (ignition ON) and includes:
- Determination of the emergency running position
- Determination of the lower mechanical stop of the throttle valve
- Adaptation of the actual value amplifier (signals 1 and 2) in the ME-SFI [ME] control unit
- Checking the return spring