On the face of the rotor are 2 holes. You need to simultaneously screw in 2 hex bolts, size: M8x1.25mm. The bolts will push the rotor off the wheelbearings. From the Advance auto store guy & Jim's dad.
It connects the TPS (Throttle Position Sensor) to the ECM (Engine Control Module) so the ECM can receive information transmitted by the TPS.