Ignition Switch - Push Button Start
WARNING: This page is about a different car, the 2013 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.
The ignition switch - push button start is a momentary contact switch that is hardwired to the BCM, PCM and RFA module. The ignition switch - push button start is used to obtain the OFF, ON or START ignition modes.