SA-227 pilot reported Nose Wheel Steering malfunction during takeoff roll and performed a rejected takeoff.

Narrative

Aircraft diving hard right on takeoff with nosewheel steering deferred. Operating a flight from ZZZ to ZZZ1 when on the first taxi out the NWS failed to pass the systems test. We taxied back to the hangar and decided to continue the flight with the NWS deferred. On the taxi out no issues we're noted with taxiing the airplane. On takeoff on XXL at ZZZ; after lining up; power was advanced to 30% with the brakes held; once the brakes were released the aircraft went hard to the right; made the decision to abort the takeoff and taxi off XXL on XX. After calling the Duty Pilot we attempted a takeoff again taking extra care to ensure the torque was matched and would not cause differential thrust. On the second takeoff the same loss of control to the right was noted; elected to discontinue the flight and return to the ramp.Aborted the first takeoff; made a 2nd attempt after calling the Duty Pilot with the same result; elected to discontinue the flight. I am unsure of a way to prevent this other than continuing to make safe decisions and abort takeoffs if it doesn't feel right.