Data Sensors & Switches: Notes
Manifold Absolute Pressure (MAP) Sensor
The MAP sensor is located in the passenger compartment, just above the logic module. See Fig 1 . It monitors manifold vacuum via a vacuum line from the throttle body to the sensor.
The sensor supplies the logic module with an electrical signal which keeps the module informed of manifold vacuum conditions and barometric pressure. This information is combined with data supplied by other sensors to determine correct air/fuel ratio.