Ventilation Valve: Inspection

WARNING: This page is about a different car, the 2006 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT VENTILATION VALVE
1. Install a clean hose to the ventilation valve.
2. Check the ventilation valve operation.
  1. Blow air into the cylinder head side, and check that air passes through easily.
    CAUTION: Do not suck air through the valve. Petroleum substances inside the valve are hazardous to your health.
    
    Fig 1: Cleaning Hose To Ventilation Valve (Cylinder Head Side)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Blow air into the intake manifold side, and check that air passes through with difficulty.
    If the result is not as specified, replace the ventilation valve.
3. Remove the clean hose from the ventilation valve.
  
  Fig 2: Cleaning Hose To Ventilation Valve (Intake Manifold Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002