Brake Pressure Transducer
WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The brake pressure transducer (if equipped) is mounted on the bottom of the master cylinder near the rear and sends a variable voltage to the ABS module depending on the pressure applied to the brake pedal. The ABS module receives this information directly from the pressure transducer.