An electric steering lock device is configured with a control unit to
operate a steering column lock between a steering locked state and a
steering unlocked state. The electric steering lock device has a locking
limit switch that turns on when a locking member reaches the locking stop
position, and turns off when an unlocking command for the locking member
is outputted. An unlocking limit switch of the electric steering lock
device turns on when the locking member reaches the unlocking stop
position, and turns off when a locking command for the locking member is
outputted. The electric steering lock control unit determines that the
locking limit switch or the unlocking limit switch has malfunctioned
based on the state of the locking member.