Ventilation Valve: Inspection

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT VENTILATION VALVE SUB-ASSEMBLY
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.
    
    Fig 1: Checking Air Passes Through Ventilation Valve Easily
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    CAUTION: Do not suck air through the valve. Petroleum substances inside the valve are hazardous to your health.
  2. Blow air into the intake manifold side, and check that air passes through with difficulty.
    
    Fig 2: Checking Air Passes Through Ventilation Valve With Difficulty
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    If the result is not as specified, replace the ventilation valve sub-assembly.
3. Remove the clean hose from the ventilation valve.