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Home >> Toyota >> 2017 >> Yaris iA Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Intake System (Service Information) >> Check Valve >> Inspection >> Procedure
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Check Valve: Inspection: Procedure

  1. INSPECT CHECK VALVE 
    1. Airflow Inspection
      1. Remove the vacuum hose.

        Refer to REMOVAL 

      2. Blow air into the vacuum hose using your mouth from the vacuum pump side and verify that the air flows to the intake manifold side, then blow air from the intake manifold side and verify that the air does not flow to the vacuum pump side.

        If there is any malfunction in the check valve, replace it with the vacuum hose as a single unit.

        GTY486436Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Intake Manifold Side
        *b Check Valve
        *c Vacuum Pump Side

        Refer to REMOVAL 

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