FIELD: transmission of data in motor vehicle. SUBSTANCE: in proposed device comprising pulse transducer and reference instrument signal generated by sensitive element in addition to traditional transmission is sent in encoded form over data transmission line from pulse transducer to reference instrument by request of reference instrument. For this purpose instrument signal is first stored for time period in pulse transducer. Content of storage is encoded preferably by DES coding method before its transmission. Reference instrument compares transmitted encoded signal with signal transmitted by traditional method and recorded in it. Said comparison is simple way to identify manipulation in transmission lines. Device can also incorporate pulse transducer designed for updated data transmission gear. EFFECT: raised functional reliability of device. 14 cl, 1 dwg
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