Toyota 2VZ-FE Manual page 178

EMISSION CONTROL SYSTEMS
INSPECTION OF PCV VALVE
1. REMOVE PCV VALVE
2. INSTALL CLEAN HOSE TO PCV VALVE
3. BLOW AIR FROM CYLINDER HEAD SIDE
Check that air passes through easily.
NOTICE: Do not suck air through the valve.
Petroleum substances inside the valve are harmful.
4. BLOW AIR FROM AIR INTAKE CHAMBER SIDE
Check that air passes through with difficulty.
If the PCV valve fails either of the checks, replace it.
5. REMOVE CLEAN HOSE FROM PCV VALVE
6. REINSTALL PCV VALVE
INSPECTION OF PCV HOSE AND
CONNECTIONS
VISUALLY INSPECT HOSE AND CONNECTIONS
Check for cracks, leaks or damage.
– Positive Crankcase Ventilation (PCV) System
EC–5