Manifold Absolute Pressure Sensor

The manifold absolute pressure (MAP) sensor is installed on the intake manifold collector. Detects intake manifold pressure, and transmits a voltage signal to the ECM.

The sensor uses a silicone 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.