Procedure should include
- removing the vacuum supply hose to booster and checking with a gauge
- testing brake pedal by depleting the reserve
- restarting the engine.
ASE Education Foundation
2017 Maintenance and Light Repair (MLR) Level
V. Brakes
E. Power-Assist Units
Task 2
Process/Skill Questions:
- How should vacuum supply be checked?
- How much vacuum is enough?
- What causes a hard brake pedal?