Emission Control System: Inspection: Inspection

WARNING: This page is about a different car, the 2011 Toyota Avalon. 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.
  
  Fig 1: Blowing Air Into Cylinder Head Side
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check ventilation valve operation.
  1. Blow air into the cylinder head side, and check that air passes through easily.
    WARNING:
    Do not suck air through the valve. Petroleum substances inside the valve are dangerous to your health.
  2. Blow air into the intake manifold side, check that air passes through with difficulty.
    
    Fig 2: Blowing Air Into Intake Manifold Side
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    If operation is not as specified, replace the ventilation valve.
3. Remove the clean hose from the ventilation valve.
INSPECT FUEL TANK CAP ASSEMBLY
1. Visually check if the cap and gasket are deformed or damaged.
  
  Fig 3: Identifying Fuel Tank Cap Assembly Gasket
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002