Accelerator Pedal Position Sensor: Description and Operation

GF30.20-P-2010SM Accelerator Pedal Sensor, Component Description
- ENGINE 113.986 in MODEL 215, 220
- ENGINE 113.987 in MODEL 209
- ENGINE 113.988 in MODEL 203 up to Model Year 8
- ENGINE 113.989 in MODEL 171 up to Model Year 8





View of accelerator pedal module
B37 Accelerator pedal sensor
KdS Kick-down simulator

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

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

On models 215 and 220, up to MJ 02, the kick-down switch is fitted instead of the kick-down simulator (S16/6).





Design (internal circuit)
B Magnetic flux density
LL Closed throttle position.
VL Full-load position
X Component standard for Hall element

Function
The accelerator pedal sensor operating on the Hall principle is integrated in the pedal lever shaft and consists of a shaft with a ring magnet. This rotates in a printed circuit board with stator in the fixed Hall elements. This produces a change in the voltage.

Information on the accelerator pedal position is sent as two voltages at pin 4 (at around 0.2 to 2.25 V) and at pin 5 (at around 0.4 to 4.5 V) to the ME control unit (N3/10).

The accelerator pedal sensor is supplied with 5 V voltage through pin 1 by the ME control unit. Pin 3 and 6 are ground connections.

The accelerator pedal sensor can only be replaced completely with an accelerator pedal module.