Dafs use electric pedals rod have done for years there's is a simple system has 2 circuits in it and 5 wires. An idle validation switch which is iver on or off to let the ecu no the pedal is at idle. And a 5v supply and earth with a signal wire for the throttle side the 5v varies on the signal wire back to the ecu to tell it throttle position. They use iver a potentiometer or a hall switch depending on age. The fail safe is if the throttle side on it go's it still has the idle switch that will give it a limp home and 10% in it's pedal range and if the idle switch go's it will idle at 3000rpm iver way you can still get home