Nozzle, Washer: Operation: Headlamp
WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Each time the headlamp washer pump/motor unit is activated, pressure builds within the high pressure supply lines to each headlamp washer nozzle. As the hydraulic pressure is delivered to the nozzle, the nozzle sprays several high pressure streams against the lens of the front lamp unit.