Electric throttle controller: Function

Two potentiometers register the current position of the throttle valve. The engine management controls the position by means of the electric drive until the current valve opening corresponds to the set position. Two potentiometers are used for safety reasons. The characteristic curves of the two potentiometers are contra-rotating. The engine control module powers both potentiometers with an exact voltage of 5 V. This voltage source is also used to supply sensor 1 of the pedal-position sensor or accelerator pedal module.