Manifold Absolute Pressure Sensor

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The manifold absolute pressure (MAP) sensor is placed at intake manifold collector. It detects intake manifold pressure and sends the voltage signal to the ECM.

The sensor uses a silicon diaphragm which is sensitive to the change in pressure. As the pressure increases, the voltage rises.

Fig 1: Identifying Manifold Absolute Pressure Sensor

Courtesy of NISSAN NORTH AMERICA, INC.