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HOMESERVICE MANUALSTOYOTA2009YARIS S, 4D HATCHBACKREPAIR AND DIAGNOSISENGINE MECHANICALAUXILIARY EMISSION CONTROL SYSTEMSPCV VALVEINSPECTION
2009 Toyota Yaris S, 4D Hatchback

PCV Valve: Inspection

2009 Toyota Yaris S, 4D HatchbackSECTION Inspection
  1. INSPECT POSITIVE CRANKCASE VENTILATION VALVE (PCV VALVE) 
    1. Install the hose onto the positive crankcase ventilation valve (PCV valve).
    2. Check the ventilation.
      1. Check the ventilation when air is applied from the cylinder head side.
        Fig 1: Checking Ventilation (1 Of 2)
        G04829157Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        Air flows. 

        CAUTION: Do not inhale the air from the ventilation valve because it is harmful.
      2. Check the ventilation when air is applied from the intake manifold side.

        Standard: 

        Air does not flow. 

        If the ventilation is not as specified, replace the positive crankcase ventilation valve (PCV valve).

    3. Remove the hose from the positive crankcase ventilation valve (PCV valve).
      Fig 2: Checking Ventilation (2 Of 2)
      G04829158Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.