Outline Of Diagnosis

Detect the malfunction of air flow sensor output properties.

Judge as a low side NG when the air flow voltage indicates a small value regardless of running in a state where the air flow voltage increases.

Judge as a high side NG when the air flow voltage indicates a large value regardless of running in a state where the air flow voltage decreases.

Judge air flow sensor property as NG when the low side or high side becomes NG.