Patent ID: 7433767

Claim:
A vehicle steering control device having plural systems each including an electric motor for driving a steering mechanism for steerable wheels in dependence on rotational manipulation of a steering handle, each of the systems being provided with the electric motor, drive means for driving the electric motor and control means for controlling the drive means in dependence on the rotational manipulation of the steering handle, wherein: the control means of the respective systems include abnormality monitor means for mutually monitoring abnormalities of the systems to stop an abnormal system; when the respective systems are normal, the control means of the respective systems drivingly control the electric motors of their own systems through the respective drive means to drive the steering mechanism in a certain steering range by cooperation of the respective electric motors; and when at least one of said plural systems is abnormal and at least another one of said plural systems is normal, the control means of the at least another one of said systems drivingly controls the electric motor of the at least another one of said systems to drive the steering mechanism in a range that, when the vehicle is stopped, is limited to be less than the certain range.