Outline Of Diagnosis
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Detect the malfunction of air flow sensor output properties.
Judge as NG on the Low side when the displayed value of air flow voltage is small even in a driving condition where it should be large. Judge as NG on the High side when the displayed value of air flow voltage is large even in a driving condition where it should be small. Judge as NG in the air flow sensor property when either the Low side or High side becomes NG.