Brake Booster: Inspection

INSPECT VACUUM CHECK VALVE
1. Inspect the vacuum check valve.
  1. Slide the clip and disconnect the vacuum hose.
  2. Remove the vacuum check valve.
  3. Check that there is ventilation from the booster to the engine, and no ventilation from the engine to the booster.
    HINT:
    
    If any fault is found, replace the vacuum check valve.
  Fig 1: Inspecting Vacuum Check Valve
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