Speed Dependent Wipers
WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.
When the wiper/washer switch is in any intermittent setting except the lowest setting, the speed dependent feature increases the frequency of wiping as the vehicle speed increases to compensate for the extra moisture that accumulates on the windshield.
The BCM receives the vehicle speed from the ABS module. The BCM then sends the vehicle speed data to the driver side windshield wiper motor through the LIN.