nissan Workshop Repair Guides

Nissan and Datsun Workshop Service and Repair Manuals

Relays and Modules - Emission Control Systems > < Positive Crankcase Ventilation|Description and Operation
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Positive Crankcase Ventilation: Testing and Inspection

Fig. 3 Testing PCV valve (typical)

    With engine running at idle, remove the ventilator hose from PCV valve; if the valve is working, a hissing noise will be heard as air passes through the
valve and a strong vacuum should be felt immediately when a finger is placed over valve inlet, Fig. 3.

Relays and Modules - Emission Control Systems > < Positive Crankcase Ventilation|Description and Operation