| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the poor start of an engine in accordance with a poor communication by installing low voltage communication mode part for assuring the communication between an immobilizer control part and the engine control part into the immobilizer control part and the engine control part respectively, when the voltage of an electric source is less then a set low voltage after starting of an engine start. SOLUTION: When an engine drive allowance signal or a drive prohibition signal is inputted from an immobilizer control part 8 into an engine control part 10 by yes/no of a discrimination code inputted from a coil unit 6 within a set communication time T from the start of an ignition key 4 start, the drive is continued or prohibited. The immobilizer control part 8 and the engine control part 10 have the watching function of the voltage of the electric source and the communication between the immobilizer control part 8 and the engine control part 10 is ensured by respective low voltage communication mode parts 34, 36, when the voltage of the electric source is less than a set low voltage after starting an engine start. Consequently, the poor start of the engine occured at the time when a battery is weakened at the low temperature time is prevented.</p> |
