Shift range control device

A shift range control device for controlling a shift range switching system switching a shift range of a vehicle by controlling drive of a motor, the shift range control device comprising:

• an angle calculation unit configured to acquire a motor rotation angle signal and calculate a motor angle output from a motor rotation angle sensor, the motor rotation angle sensor detecting a rotational position of the motor;
• a signal acquisition unit configured to acquire an output shaft signal output from an output shaft sensor, the output shaft signal having a value changing stepwise in accordance with a rotational position of an output shaft to which rotation of the motor is transmitted, the output shaft sensor detecting the rotational position of the output shaft;
• a drive control unit configured to control the drive of the motor such that the motor angle has become a target motor angle value corresponding to a target shift range;
• and
• a range determination unit configured to determine an actual range as an actual shift range based on the output shaft signal and the motor rotation angle signal,
• wherein the range determination unit is further configured to:
• determine the actual range based on the output shaft signal and the motor rotation angle signal during switching of the shift range;
• and
• determine the actual range based on the output shaft signal after the switching of the shift range is completed.