Abstract: A system and a method for data communication with a vehicle control device include a flash adapter which is inserted with a vehicle key into an ignition lock of a vehicle. Upon insertion into the ignition lock, the vehicle key is authenticated. Subsequently, a comparison between the control device data stored in the key and the vehicle can be triggered by using the flash adapter.

Abstract: A passive motor vehicle access system has at least one handle on the vehicle and at least one capacitive sensor situated in the vicinity of the handle which triggers a data identification interrogation of a data carrier in the user's possession, if the handle is actuated. A method comprises: determination of the number of cases of negative data identification that have already been carried out during a pre-determined time period; comparison of the determined number of negative identification cases with a pre-determined threshold value; and additional data identification interrogation, if the number of negative data identification cases is less than the pre-determined threshold value, or transmission of a new referencing command signal to the capacitive sensor or sensors in order to obtain a new reference for the latter, if the number of negative data identification cases is equal to the pre-determined threshold value.

Abstract: A system and a method for data communication with a vehicle control device include a flash adapter which is inserted with a vehicle key into an ignition lock of a vehicle. Upon insertion into the ignition lock, the vehicle key is authenticated. Subsequently, a comparison between the control device data stored in the key and the vehicle can be triggered by using the flash adapter.

Abstract: A method and a system for exchanging data between at least one vehicle-mounted control device and a portable hand-held device, for example in the form of a key in which software for transmission to the at least one vehicle-mounted control device is stored.