Kia Niro: Engine Control System / Manifold Absolute Pressure Sensor (MAPS) Description and operation

Kia Niro 2017 (DE HEV) Service Manual / Engine Control/Fuel System / Engine Control System / Manifold Absolute Pressure Sensor (MAPS) Description and operation


Manifold Absolute Pressure Sensor (MAPS) is a speed-density type sensor installed on the surge tank. It senses absolute pressure of the surge tank and transfers the analog signal proportional to the pressure to the ECM. By using this signal, the ECM calculates the intake air quantity and engine speed.

The MAPS consists of a piezo-electric element and a hybrid IC amplifying the element output signal. The element is made of silicon diaphragm, which has the pressure sensitive variable resistor effect of semi-conductor. One side of silicon diaphragm is 100% vacuum and manifold pressure is applied on the other side. Hence, output is gained from the silicon variation in proportion to the pressure change.

Manifold Absolute Pressure Sensor (MAPS) Specifications
Specification Pressure [kPa (kgf/cm², psi)] Output Voltage (V) [Vref = 5V] 20.0 (0.20, 2.9) 0.79 46.7 (0.47, ...

Manifold Absolute Pressure Sensor (MAPS) Schematic diagrams
Circuit Diagram Harness Connector ...

Other information:

Toyota Corolla 2019-2022 Owners Manual: Initial screen
When the engine switch is turned to ACC or ON, the initial screen will be displayed and the system will begin operating. Caution screen After a few seconds, the caution screen will be displayed. After about 5 seconds or selecting “Continue”, the caution screen automatically switches to the nex ...

Kia Niro (DE HEV) Owners Manual: Warning type
The system will activate when: 1.The system is on 2.Vehicle speed is above 30 km/h (18.6 mph) 3.Other vehicles are detected in the rear side 1st stage If a vehicle is detected within the boundary of the system, a warning light will illuminate on the outside rearview mirror. If the detected ...

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