Anti-vehicle-theft apparatus

摘要

The anti-vehicle-thief apparatus has an immobilizer unit 4 for comparing a specific first code received from a transponder 1 to a stored code just after an engine is started, and when these codes are identical, outputting a second code to an EGI unit 9, the EGI unit 9 for comparing the second code to a stored code, and when these code are identical, permitting the engine to continue operation, a CPU 13 for counting the number of times that an ignition switch power supply is turned ON and OFF during a code comparison time period, and backup RAM 17 capable of storing the counted number of times that the ignition switch power supply is turned ON and OFF for a predetermined time period. When the ignition switch power supply is turned ON and OFF repeatedly more than a predetermined number of times, the EGI unit 9 causes the engine to stop.