WARNING: This page is about a different car, the 2018 Volkswagen Jetta, 2017 Volkswagen Jetta, and 2016 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
-- Position the :VAG1274B
with the :VAG1274/9
on the cap.
-- Generate pressure with the cooling system tester hand pump.
The pressure release valve must open at 1.6 to 1.8 bar (23.2 to 26.1 psi).