Steering control device for vehicle

A vehicle comprising:

• a steer-by-wire system including a steering wheel, steered wheels, and a steering angle motor, the steering wheel and the steered wheels being mechanically separated from each other, the steering angle motor being configured to change a steering angle of the steered wheels in response to a steering operation on the steering wheel;
• a main power supply configured to provide electric power to the steering angle motor;
• a backup power supply configured to start to be charged, in response to the vehicle being powered on;
• a processor configured to
• determine whether the main power supply is abnormal, and
• in response to a determination that the main power supply is abnormal,
• switch power supply to the steering angle motor from the main power supply to the backup power supply, and
• output a report that indicates an anomaly of the main power supply;
• and
• a hydraulic brake for braking rotation of wheels of the vehicle with hydraulic pressure generated by a depressing operation of a brake pedal, wherein
• the processor is further configured to
• determine whether a state of charge of the backup power supply has reached a predetermined value, after starting to charge the backup power supply, and
• maintain the hydraulic pressure even in a state where the brake pedal is released, while the state of charge is determined not to have reached the predetermined value.