That is the only command. But you must send 252 in the 3rd data spot that’s means “don’t steer, and reset” after to manually move steering wheel for example.
253 means “steer if allowed”
Remember this is a new S model and you are telling the steering controller in the main tractor ecu what to do, then it is telling the valve left or right.
Make sure the WAS is calibrated via the tractor also