Place the missing words to complete the statement about throttle motor (drive by wire) controls operation. Missing Words: electric, PCM, plates, sensors, throttle One or two position [ Select... ] are attached to the accelerator pedal assembly, sending position and rate of change information to the [ Select... ]. The pedal's sensor sends a varying voltage signal to the PCM, which controls an electric motor connected to the throttle [ Select... ]. A coiled spring in the pedal assembly gives the gas pedal a normal feel. The position or rate of change in the position of the pedal is merely a request to the PCM for [ Select... ] opening. The PCM processes this request along with various other inputs and its programming. It then sends commands to a driver unit that powers the [ Select... ] motor attached to the throttle. Signals from a TP sensor allow the PCM to track the position of the throttle plate