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Brake Booster: Inspection

  1. INSPECT BRAKE VACUUM CHECK VALVE ASSEMBLY 
    1. Check 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.
        4. Fig 1: Checking That There Is Ventilation From Booster To Engine, And No Ventilation From Engine To Booster
        G04375548Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. If any fault is found, replace the vacuum check valve.
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