Corolla Sedan L4-96.8 1587cc 1.6L DOHC (4A-FE) (1989)
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Positive Crankcase Ventilation: Testing and Inspection
Fig. 142 Inspecting PCV System
To check PCV valve, remove it from engine and alternately apply air to both sides of valve. Air should flow freely when applied from the crankcase
end of valve. Air should not flow when applied from the intake manifold side. Check all hoses, gaskets and seals for deterioration, obstructions, wear or
damage. Ensure all hoses fit tightly. Fig. 142