Manifold Absolute Pressure Sensor

WARNING: This page is about a different car, the 2012 Infiniti M35h. However, it is still accessible from the selected car via links, so may be relevant.

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 (MAP)

Courtesy of NISSAN NORTH AMERICA, INC.