Component Tests and General Diagnostics

Air Mass Meter

Mass Air Flow Sensor Plausibility Check

General Description
The purpose of the diagnosis is to detect a defect air mass flow sensor, in case of failure. The measured air mass flow will be compared first with the minimal value of a maximal threshold and the calculated air mass flow multiplied by a factor. In case the measured air mass flow is bigger than this minimal election an error is detected (Mass air flow too high).

To detect a mass air flow too low, the measured air mass flow must be lower than a minimal threshold.

Flowchart: Mass Air Flow Sensor Plausibility Check







Mass Air Flow Sensor Electrical Check

Flowchart: Mass Air Flow Sensor Electrical Check