Vehicle theft prevention device

摘要

To further enhance a theft prevention effect in a theft prevention device which makes an ECU operable by transmitting a second ID code to the ECU from a keyset when an input code agrees with a first ID code. A theft prevention device includes a means for inputting a second reference code which is collated with a second ID code which is provided to a receiver unit (4) of an ECU (10) or a keyset. The theft prevention device further includes a means which, when the inputted code and a pre-registered second reference code agree with each other, writes the registered second reference code into the receiver unit as the second ID code. The code which is inputted as the second reference code is inputted based on an opening/closing manipulation of a throttle provided to a vehicle and plural times of standing/storing manipulation of a side stand (12), and one digit of the code is represented by the number of throttle manipulations during two side stand standing/storing manipulations.