Hyundai Sonata LF Quiz
Engine Control System/Fuel System

Manifold Absolute Pressure (MAP) Sensor Description and Operation

In this manual: Engine Control System/Fuel System
General Information — 9Engine Mechanical System — 90Engine Electrical System — 58Emission Control System — 24Engine Control System/Fuel System — 114Drive Shaft and Axle — 15Suspension System — 35Steering — 19Restraints — 50Brake System — 54Body (Interior and Exterior) — 213Body Electrical System — 241Heating, Ventilation, and Air Conditioning — 56DCT (Dual Clutch Transmission) System — 52
~1min read

Description

The Manifold Absolute Pressure (MAP) sensor is a speed-density type sensor and is installed on the surge tank. It senses the absolute pressure in the surge tank and sends an analog signal proportional to the pressure to the ECM. Using this signal, the ECM calculates the intake air volume and engine speed. The MAP sensor consists of a piezoelectric element and a hybrid IC that amplifies the element output signal. The element is a silicon diaphragm type and uses the pressure-sensitive effect of a semiconductor variable resistor. Since a 100% vacuum and the intake manifold pressure are applied to each side of the sensor, the sensor can output an analog signal proportional to the pressure change using the silicon change.

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