Checking the Pressure Relief Valve in the Version 2 Cap:
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2017 Audi A5 Quattro, 2016 Audi A5 Quattro, 2015 Audi A5 Quattro, 2014 Audi A5 Quattro, and 2013 Audi A5. However, it is still accessible from the selected car via links, so may be relevant.
-- Position the :VAG1274B with the :VAG1274/9 on the cap.
-- Generate pressure with the cooling system tester hand pump.
Blue Cap:
- The pressure release valve must open at 1.4 to 1.6 bar (20.30 to 23.20 psi).
-- If the pressure relief valve does not react as specified, replace the cap.
Black Cap:
- The pressure release valve must open at 1.6 to 1.8 bar (23.2 to 26.1 psi).
-- If the pressure relief valve does not react as specified, replace the cap.