[mwebb]

there is a lot happening in drive by wire systems

early DBW in a 2002 jetta selected from Measured value blocks ,related PIDs are graphed while sweeping accel pedal slowly open and closed , key on engine off .

some accel pedal sensor position values start high and switch low and some are reversed , same with throttle plate position sensors and
there is redundancy

change in rate of speed of the accel pedal movement has a larger effect on throttle plate movement than most can imagine

the accelerator pedal input
is the input from driver to ECM ,
the ECM then opens or closes the throttle based on how it weighs that input along with all the other inputs it is receiving at the time