Tests And Test Requirements
WARNING: This page is about a different variant/trim than selected.
Special tools and workshop equipment required
- Brake Servo Tester: VAS6721
The following checks will be helpful when 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
- Gasket between the brake master cylinder and the brake booster
- Check Valve
- Vacuum lines with connectors
- Vacuum pump (if equipped)
TIP:
Keep the geographical surrounding in mind when evaluating the measurement results. The higher above sea level, the lower the air pressure.
Note the test requirements:
- Visually inspect all of the vacuum lines for damage (for example, tears or damage caused by animals) and secure fit
- Clean the engine compartment before starting work, if necessary
- Maintain clean working conditions when working on the vacuum system