![]() The ECM applies 5 volts to the MAF sensor on the MAF sensor signal circuit. A large quantity of air entering the engine indicates a high load condition. A small quantity of air entering the engine indicates a low load condition. The air flow and engine speed are very dependent on the battery pack state of charge. The engine control module (ECM) uses the MAF sensor signal to provide the correct fuel delivery for all engine speeds and loads. The MAF sensor is an air flow meter that measures the amount of air entering the engine. ![]() The mass air flow (MAF) sensor is integrated with the inlet air temperature (IAT) sensor.
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