The switch transmits information to the control unit that the accelerator pedal is pressed all the way and overcomes the resistance at the end of its stroke. The need to increase torque leads to forced shifting of the automatic transmission to a lower gear.
The switch is located under the accelerator pedal and is connected to a connector on the instrument panel.
The switch closes when the pedal is pressed all the way and overcomes the resistance at the end of its stroke.
The position of the switch is adjusted when adjusting the throttle valve drive.