Control unit sets {TAIL ~ a target motor current} on {HEAD ~ the basis} of at least the steering torque detected by the steering torque sensor 
Control unit sets { TAIL ~ a target motor current } on { HEAD ~ the basis } of at least the steering torque detected by the steering torque sensor
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH