Accelerator Pedal Position Sensor: Description and Operation

GF30.20-P-2010KE Accelerator Pedal Sensor Component Description
- ENGINE 271.921 /944 /946 /948 up to Model Year 8
- ENGINE 271.941 /955 /956
- ENGINE 271.940 in MODEL 209.342 /442
- ENGINE 271.940 in MODEL 203 up to Model Year 8





Arrangement illustrated on model 171
B37 Accelerator pedal sensor
X11/4 Data link connector

The accelerator pedal sensor is located at the top of the accelerator pedal module.

Task
The accelerator pedal sensor converts the mechanical operation input by the accelerator pedal into an electrical voltage corresponding to the accelerator pedal position.





Accelerator pedal module, installation
B37 Accelerator pedal sensor
a Kick-down simulator

The kickdown simulator is not an electrical component. It is designed to enable the driver to sense with his foot the point at which the accelerator pedal is fully depressed (full load position).

On models 203, 209 and 211, up to model year 2002, the kick-down switch (S16/6) replaces the kick-down simulator.

The accelerator pedal sensor can be replaced only with the complete accelerator pedal module.





Body (internal circuit)
1 Pin 1: Power supply (5 V) from the ME control unit (N3/10)
3 Pin 3: Ground connection
4 Pin 4: Signal voltage 1 (approx. 0.20 to 2.25 V)
5 Pin 5: Signal voltage 2 (approx. 0.40 to 4.50 V)
6 Pin 6: Ground connection
B Magnetic flux density
LL Closed throttle position.
FL Full-load position
X Hall element

Function
The accelerator pedal sensor consists of a shaft with a ring magnet. This rotates in a printed circuit board with stator in the two fixed Hall elements. This produces a change in the voltage.
Information on the accelerator pedal position is transmitted in the form of two signal voltages (0.20 to 2.25 V and 0.40 to 4.50 V) to the ME control unit (N3/10).