VEHICULAR STEERING CONTROL SYSTEM AND STEERING CONTROL METHOD
In a vehicle including a VGRS actuator (200) capable of changing the steering transmission ratio by rotating an upper steering shaft (12) and a lower steering shaft (15) relative to each other, an ECU (100) performs a lock releasing process when the VGRS motor (202) is locked. In the process, an actual steering angle dr is calculated, and is compared with a lock release threshold value drth that is set in advance in view of the axial force applied to the lower steering shaft (15) during steering. If the actual steering angle dr is equal to or smaller than the lock release threshold value drth, the ECU (100) performs driving control of a lock mechanism (203) so as to release the locked state of the VGRS motor (202).