| 摘要 |
<p>PURPOSE:To prevent a vehicle from being stolen by providing a control circuit for changing a password number by means of an input from a key board when an electric system is operated while a vehicle is stopped. CONSTITUTION:A change of password number judging means 10 judges an output signal from a speed sensor 3 by means of a speed signal judging means 16 when a vehicle is stopped, and outputs a signal to a password number writing means 17 under a condition that a system operation/non-operation setting means 6 is operating according to the output signal of a mechanical key 1. This writing means 17 writes a new password number into a password number memory 18 and, after that, the suitability of an input is judged based on this password number by a password number judging means 9. The password number may be arbitrarily changed by a user. Accordingly, it is possible to make the input of power source through a key board 2 unable unless a password is newly written, preventing the vehicle from being stolen.</p> |
