Kia Cadenza VG Owner's Manual Quiz
Engine Control System/Fuel System

Manifold Absolute Pressure (MAP) Sensor Description and Operation

In this manual: Engine Control System/Fuel System
General Information — 15Engine Mechanical System — 95Engine Electrical System — 54Emission Control System — 24Engine Control System/Fuel System — 115Automatic Transmission — 91Drive Shaft and Axle — 13Suspension System — 35Steering — 19Restraints — 46Brake System — 43Body (Interior and Exterior) — 51Body Electrical System — 245Heating, Ventilation, and Air Conditioning — 56
~1min read

Description

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

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