Steering control device

A steering control device that controls, as a target, a steering device including a steering actuator that operates to apply a steering reaction force to a steering wheel of a vehicle and a turning actuator that has a structure with a power transmission path mechanically separated from the steering actuator and that operates to turn turning wheels of the vehicle,

• the steering control device comprising a control unit that executes synchronization control for controlling an operation of at least one of the steering actuator and the turning actuator such that a positional relationship between a rotational position of the steering wheel and a turning position of the turning wheels meets a predetermined correspondence relationship, wherein:
• the control unit is configured to execute one or more processes including:
• a deviation amount determination process of determining a magnitude of an absolute value of a deviation amount of the positional relationship from the predetermined correspondence relationship upon power to the vehicle being turned on, and
• a synchronization control process of, based on a determination result of the deviation amount determination process, executing the synchronization control via at least one of a turning-side synchronization control of performing a correction process on the turning position of the turning wheels by operating the turning actuator and a steering-side synchronization control of performing a correction process on the rotational position of the steering wheel by operating the steering actuator;
• and
• the control unit is configured to execute, in the synchronization control process:
• the turning-side synchronization control when the absolute value of the deviation amount is a value within a first range;
• the steering-side synchronization control when the absolute value of the deviation amount is a value within a second range that is larger than the value within the first range;
• and
• at least one of the turning-side synchronization control and the steering-side synchronization control when the absolute value of the deviation amount is a value within a third range that is between the value within the first range and the value within the second range.