ACCESS AND START/DRIVE AUTHORIZATION SYSTEM

摘要

The invention relates to an access and start/drive mode authorization system for a motor vehicle, comprising a portable transponder and a control device installed in said motor vehicle for the purpose of controlling the closing system and controlling the engine, whereby access to and the start/drive mode of the vehicle is triggered or blocked by said devices in question and answer dialogs with matching coded information. In order to prevent the vehicle from starting and driving after a violent intrusion therein and after an exchange between the engine control with an immobilizer and a transponder of the devices responsible for start/drive control, the triggering (ms) of the start and drive mode of the motor vehicle after a successful start/drive authorization question and answer dialog (SFD) depends upon a previously successful access authorization question and answer dialog.