Patent ID: 8552715

Claim:
A method for determining an actuation position of a motor-driven adjusting element of a motor vehicle via a Hall-effect sensor arranged in a rotatable magnetic field, the method comprising: converting a periodic change in a magnetic flux density sensed by the Hall-effect sensor into a binary pulse train, a pulse being transitioned when an upper switching threshold is positively exceeded and when a lower switching threshold separated from the upper switching threshold by a hysteresis is negatively exceeded; and reducing the hysteresis following an inactive phase of the Hall-effect sensor, during which phase, the magnetic field is stationary and/or the Hall-effect sensor is deactivated if the magnetic flux density at the start of the inactive phase has exceeded the upper switching threshold by no more than a predefined tolerance range, wherein the hysteresis is reduced by lowering the upper switching threshold, and wherein the hysteresis is reduced by an amount that corresponds at least to a magnitude of a threshold drift resulting from a heating or cooling of the Hall-effect sensor.