FIELD: automotive industry; protection of automobile from unauthorized use. SUBSTANCE: proposed system with connector for external device has engine control unit, immobilizer and first data exchange line connecting immobilizer with engine control unit. Design peculiarity of system is that it is furnished additional with second data exchange line and protection device of first data exchange line. This device has control input and first and second data inputs for transmitting data from first input to second input and in reverse direction. Immobilizer is provided with additional request input for connection of external device and output to control protection device. First data input of protection device is connected through second data exchange line with connector for external device, second data input is connected to first data exchange line, and control input is connected to additional output of immobilizer whose additional input is connected with second data exchange line. Proposed system provides protection against unauthorized access to first data exchange line. EFFECT: improved secrecy. 5 cl, 1 dwg
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