Anti-theft device

TL;DR: In this paper, a key insertion switch is closed and power is supplied to an anti-theft controller (8) and an engine controller (9), which do not consume power until the key insertion switches are closed.

Abstract: When a key (1) is inserted into a key cylinder (31) and a key insertion switch (2) switches from an open state to a closed state, a signal is provided to a main relay controller (15). This main relay controller (15) provides a low level signal to a base of a first transistor (11) to actuate a coil (21a). Therefore, a contact point (21b) is closed and power is supplied to an anti-theft controller (8) and an engine controller (9). Thus, these controllers (8, 9) do not consume power until the key insertion switch (2) is closed and thus, their construction can be made simple since there is no need to operate them in a sleep mode.