Trigger signal: Door linkage (most common): when the door is opened, the door sensor sends a signal to the controller, triggering the pedal to extend.

Pedal Deployment: The control unit starts the motor and pushes the pedal to unfold outward through gear + linkage or screw drive to form a stepping plane.

Retraction after use: After the passenger gets on the vehicle, when the door is closed or a retraction command is received, the motor reverses and the pedal retracts along the original path to the bottom of the chassis.