Abstract: A vehicle lock apparatus in which a wireless door lock function and an immobilizing function are established is provided. A key (26) is provided with a battery (30), a switch (32) and a control IC (28). An antenna-coil 12 is mounted at an end portion of a key cylinder (10). A wireless antenna (20) is mounted at a predetermined position in a vehicle. When the switch (32) is turned on, a wireless signal is transmitted by the control IC (28) so that the wireless door lock function is established.

Abstract: An anti-theft system for a vehicle which monitors a state of a memory storing a check code so as to maintain a prohibition of operation of the vehicle when an abnormal state is detected in the memory. A control unit, provided in the vehicle, has a memory in which a first check code is recorded. A transmitting unit transmits a second check code to the control unit. The transmitting unit is separate from the control unit. Prohibition of operation of the vehicle is withdrawn when the first check code matches the second check code. The withdrawal of prohibition is prohibited when it is determined that the memory is not connected to the control unit. The withdrawal of prohibition may be prohibited when a first ID code stored in the memory does not match a second ID code stored in a second memory provided in the control unit.