Coolant Pump, Removing And Installing: Notes
WARNING: This page is about a different car, the 2015 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Pulling on the coolant pump control valve by hand to check the function is not permitted! This can lead to damage inside the coolant pump. As a result, the engine will not be supplied with enough coolant.