Ventilation Valve: Inspection

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

INSPECT VENTILATION VALVE SUB-ASSEMBLY

Install a clean hose to the ventilation valve.
Check the ventilation valve operation.
1. Blow air into the cylinder head side, and check that air passes through easily.
  
  Fig 1: Installing Clean Hose To Ventilation Valve
  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. If the result is not as specified, replace the ventilation valve sub-assembly.
Remove the clean hose from the ventilation valve.

Fig 2: Removing Clean Hose From Ventilation Valve