PCV Valve: Inspection

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.

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)
    Courtesy 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)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002