Dakota R/T 2WD V8-5.9L VIN Z LDC (1999)
Manifold Pressure/Vacuum Sensor: Description and Operation
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR-PCM INPUT
The MAP sensor reacts to absolute pressure in the intake manifold. It provides an input voltage to the powertrain control module (PCM). As
engine load changes, manifold pressure varies. The change in manifold pressure causes MAP sensor voltage to change. The change in MAP sensor
voltage results in a different input voltage to the PCM. The input voltage level supplies the PCM with information about ambient barometric
pressure during engine start-up (cranking) and engine load while the engine is running. The PCM uses this input along with inputs from other
sensors to adjust air-fuel mixture.
MAP And Throttle Position Sensor Location - Typical
The MAP sensor is mounted on the side of the engine throttle body. The sensor is connected to the throttle body with a rubber L-shaped fitting.
