PURPOSE: To detect the measurement of the position of an adjusting device without affecting the operational characteristic of an internal combustion engine in a method and an arrangement for detecting a measured value related to an engine control device of an automobile.

CONSTITUTION: The position of an adjusting device 44 is detected by the extreme values of the stored position and the detected positional signal, and the stored extreme values are detected or corrected successive to the cut-off of an engine when the operation cycle of an automobile is completed, and newly learned.