System and method for bypassing a car immobilizer

Abstract

The invention relates to automobile transport, specifically, to car protection (security) systems, and provides a method and a system for a safe remote engine start in guarded cars protected against unauthorized use, in case of a car being equipped with an in-built immobilizer. The car immobilizer bypass system comprises two devices, one of them being a key bypass module (4) containing transceiver modules (4.2) and (4.4) controlled by controller (4.1), and the other, a frequency converter (4.3). The transceiver module (4.2) interchanges data with transceiver module (2.1) of the car's security system (2) on preset communication frequency F corresponding to the frequency of data interchange with the transponder. The frequency converter (4.3) is designed with an option of two-way conversion of interchange signals from transceiver module (4.2) to module (4.4) from frequency F to frequency f, and in reverse. The system includes a remote start control device (5) comprising transceiver modules (5.2) and (5.4) controlled by controller (5.1), and a frequency converter (5.3). Module (5.2) ensures data interchange with module (4.4) on frequency f, and the frequency converter (5.3) is designed with an option of two-way conversion of interchange signals from transceiver module (5.2) to module (5.4) from frequency f to frequency F, and in reverse. Module (5.4) provides for the option of data interchange with transponder (1.1) on frequency F. The system allows to perform a remote engine start while enhancing the system of protection against unauthorized use and preserving all the original functions of the car's security system.

Dependencies are inferred from the claim text.