Speed Dependent Wipers
WARNING: This page is about a different car, the 2017 Ford Edge. 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 SCCM receives the vehicle speed from the PCM. The SCCM then sends the vehicle speed data to the driver side windshield wiper motor assembly through the LIN.