Emission Control System: Inspection

INSPECT VENTILATION VALVE SUB-ASSEMBLY
1. Install a clean hose to the ventilation valve.
2. Check 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 dangerous to your health.
  2. Blow air into the intake manifold side, check that air passes through with difficulty.
    If operation is not as specified, replace the ventilation valve.
    
    Fig 1: Checking Ventilation Valve Operation
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Remove the clean hose from the ventilation valve.
  
  Fig 2: Removing Clean Hose From Ventilation Valve
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT FUEL TANK CAP ASSEMBLY
1. Visually check if the cap and gasket are deformed or damaged.
  
  Fig 3: Inspecting Fuel Tank Cap Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002