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Home >> Lexus >> 2002 >> SC 430 >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Disc Brakes >> Testing >> Vacuum Brake Booster >> Vacuum Check Valve

Vacuum Check Valve

  1. Working at brake booster, remove clamp and disconnect vacuum hose from vacuum check valve.
  2. Remove vacuum check valve.
  3. Check that there is ventilation from booster to engine, and no ventilation from engine to booster. See Fig 1.
  4. If any fault is found, replace vacuum check valve.
Fig 1: Checking Vacuum Check Valve
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