Vacuum System, Checking: Procedure
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.
-- Check all vacuum lines in the entire vacuum system for:
- Cracks
- Damage caused by animals
- Pinching
- Porous locations and other leaks
-- Check the vacuum line leading both to and from the solenoid valve to the respective component.
-- If there is a DTC memory entry, check the vacuum lines for the named component, but also all the vacuum lines to the other components.
-- If using the :VAS6213 does not produce any vacuum or if the vacuum drops again right away, then check the hand vacuum pump and the connection hoses for leaks.