Sienna FWD V6-3.3L (3MZ-FE) (2006)
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Positive Crankcase Ventilation Valve: Testing and Inspection
INSPECTION
1. INSPECT VENTILATION VALVE SUB-ASSEMBLY
a. Install a clean hose to the ventilation valve.
b. Inspect 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 harmful.
2. Blow air into the intake manifold side, and check that air passes through with difficulty. If operation is not as specified, replace the
ventilation valve.
c. Remove the clean hose from the ventilation valve.
