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Binary editor gm 3 bar map sensor6/30/2023 This flexing causes a change in resistance and the circuitry inside the sensor converts this to a voltage ranging from 0.02V to 4.94V when the output is pulled up towards 5V by the ECM(Electronic control module).ġ Bar MAP sensors are used on NA(naturally asperated) vehicles.Ģ Bar MAP Sensors are used on forced induction vehicles(Turbo & Supercharged). ![]() It is mounted with a perfect vacuum beneath the chip so that the air pressure from the other side flexes the chip. ![]() It uses a silicon wafer that is thinner in the center (0.001") than around the edges (0.045"), which causes it to act as a diaphram. It is also used to help adjust the IAC(Idle Air Control) motor during idle. ![]() This information is used to determine the density of the air entering the combustion chamber (in conjunction with the IAT(Intake Air temperature) sensor), which is used when calculating the proper air/fuel mixture for the engine, especially at WOT since the system is not in closed-loop at this time. The logic module uses the manifold absolute pressure (MAP) sensor to determine the absolute pressure (not the relative to atmospheric pressure) of the air inside the intake manifold and the atmosphere (barometric pressure).
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