Description And Operation

Courtesy of CHRYSLER GROUP, LLC

The Manifold Air Pressure (MAP) sensor (1) mounts to the intake manifold near the front of the engine.

• The MAP Sensor is a transducer that varies resistance according to changes in altitude and atmospheric conditions.
• The MAP Sensor reading gives the Powertrain Control Module (PCM) an indication of the current air pressure within the intake manifold. The PCM uses this information to calculate fuel delivery.
• The MAP Sensor has a 5-Volt reference circuit, a low reference circuit and a signal circuit.
• The PCM supplies 5 volts to the MAP Sensor on a 5-Volt reference circuit and provides a ground on a low reference circuit.
• The MAP Sensor provides a voltage signal to the PCM on a signal circuit relative to the pressure changes.