Vacuum System, Checking: Notes
WARNING: This page is about a different car, the 2015 Volkswagen Passat, 2014 Volkswagen Passat, 2013 Volkswagen Passat, and 2012 Volkswagen Passat. However, it is still accessible from the selected car via links, so may be relevant.
The following checks will be helpful when performing Fault Finding if there are complaints regarding the brake booster or the so-called >>hard brake pedal<<.
The following components are included in the check:
- Brake booster
- Seal between the master brake cylinder and the brake booster
- Check valve
- Vacuum hoses and connectors
- Vacuum pump (if equipped)
The geographic location will influence the measurement results. The higher above sea level, the lower the air pressure.
Observe test requirements:
- Check all the vacuum hoses for damage (for example, tears or damaged caused by animals) and make sure they are secure.
- Maintain clean working conditions when working on the vacuum system.
- Clean the engine compartment before starting, if necessary.
Special tools and workshop equipment required
- Brake servo tester VAS6721
- Hand vacuum pump VAS6213