Manifold Pressure/Vacuum Sensor: Description and Operation
ENGINE CONTROL COMPONENTSManifold Absolute Pressure (MAP) Sensor
The MAP sensor measures intake manifold absolute pressure. The PCM uses information from the MAP sensor to measure how much exhaust gas is introduced into the intake manifold.
The MAP sensor for speed density control systems is centrally located on the intake manifold. The MAP sensor measures the intake manifold pressure. The powertrain control module (PCM) uses the information from the MAP sensor to determine the speed density air charge and provide input used for various spark control functions. The MAP sensor for a speed density system is integral with the intake air temperature 2 (IAT2) sensor.
Typical MAP Sensor:
Typical MAP Sensor Integrated With An IAT2 Sensor:
