Method for remote-controlled activation of vehicle door, involves transmitting two signals with different propagation speeds between operating device and vehicle, and performing plausibility check of former signal by latter signal

摘要

The method involves transmitting two signals with different propagation speeds between an operating device and a vehicle (4), and performing a plausibility check of the former signal by the latter signal. The device for unlocking or locking is activated, if the plausibility check is successful. The signals are coded process dependent, where the former signal is a radio signal while the latter signal is an ultrasonic signal. The signals are transmitted from the vehicle and are received by the operating device. An independent claim is included for a system for the remote-controlled activation of a device for releasing- or locking a door of a vehicle.