A method of operating a passive radio-based locking device and passive radio-based locking device

摘要

The invention relates to a method for operating a passive radio-based locking device (10) of a motor vehicle (11), by which at least one access function of the motor vehicle (11) can be released, wherein the passive radio-based locking device (10) comprises as components a mobile device configured as a radio key unit ( 12) and a transceiver (14) on the motor vehicle (11), between which for the electromagnetic radio link at least two electromagnetic radio signals (13, 15) are exchanged, and for the operation of each one parameter of the radio links of the passive radio-based locking device (10) changed becomes. As a parameter, an identification feature (30) of at least two data communication interface (16) for connection establishment of the radio links at the radio key unit (12) and / or at the transceiver (14) is changed in time before a release of the access function and set to a current value, and the access function is only released if the respective identification feature (30) has the current value.