toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Sensors and Switches - Emission Control Systems > < Positive Crankcase Ventilation Valve|Locations
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Positive Crankcase Ventilation Valve: Testing and Inspection

1. REMOVE PCV VALVE.

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Disconnect the PCV hose from the PCV valve.

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Remove the PCV valve.

2. INSTALL CLEAN HOSE TO PCV VALVE.
3. INSPECT PCV VALVE OPERATION.

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Blow air into the cylinder head cover side, and check that air passes through easily.

CAUTION: Do not suck air through the valve. Petroleum substances inside the valve are harmful.

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Blow air into the air intake chamber side, and check that air passes through with difficulty.

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Blow air into the air intake chamber side when lift up the inside valve, and check that there is a strong resistance to air flow.

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If operation is not as specified, replace the PCV valve.

4. REMOVE CLEAN HOSE FROM PCV VALVE.
5. REINSTALL PCV VALVE.

Sensors and Switches - Emission Control Systems > < Positive Crankcase Ventilation Valve|Locations