Accelerator pedal sensor function - GF30.20-P-4010-03M
Illustrated is the internal shift in the accelerator pedal sensor (Hall principle)
The accelerator pedal sensor converts the mechanical operation input by the accelerator pedal into an electrical voltage corresponding to the accelerator pedal position.
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.
Via Pin 1 the accelerator pedal sensor is supplied by the ME control unit with
5 V voltage. Pin 3 and 6 are ground connections.
The information of the accelerator pedal position is transmitted to the motor electronics control unit in the form of two signals (pin 5 with signal 1 has maximum approximately 4.8 V and pin 4 with signal 2 maximum approximately 2.4 V).
In the accelerator pedal sensor, the supply voltage for sensor 2 is split in half.
The ranges of signal 1 are defined in percentage of the supply voltage (approx. 5 V) as follows:
- up to 4 % the signal through the short circuit to ground or through the line interruption is too small
- 4 to 9.4 % idle speed range
- 9.4 to 81 % partial-load range
- 81 to 96 % full-load range
- over 96 % the signal through the short circuit to positive is too great.
In case of error on signal 1, it is switched over to signal 2 and the emergency mode is activated.
Kickdown detection via accelerator pedal sensor is performed, if the signals 1 and 2 remain in the full-load range for a definite time.
If the brake pedal is operated, only the idle speed values from the accelerator pedal sensor are accepted. If required, the engine control unit generates the substitute values. The signals from the accelerator pedal sensor are rejected until then.