An electronic automobile anti-theft apparatus having high reliability
includes a motor, which moves a lock pin to lock a steering shaft of an
automobile. A solenoid maintains the lock pin in a state released from
the steering shaft and operates to permit the lock pin to lock the
steering shaft by receiving power. An ECU controls the operations of the
motor and the solenoid. A mechanical switch stops supplying the solenoid
with power to prevent unintentional locking by the lock pin when the
automobile is being driven or when driving of the automobile is enabled.