Kia Forte: Engine Control System / Manifold Absolute Pressure Sensor (MAPS)

Kia Forte 2019-2021 (BD) Service Manual / Engine Control / Fuel System / Engine Control System / Manifold Absolute Pressure Sensor (MAPS)

Specifications
Specification

Pressure
[kPa (kgf/cm², psi)]
Output Voltage (V)
32.5 (0.33, 4.71)
0.5
284 (2.90, 41.19)
4.5

Description and operation
Description

Manifold Absolute Pressure Sensor (MAPS) is a speed-density type sensor and is 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 silicon diaphragm type and adapts pressure sensitive variable resistor effect of semi-conductor. Because 100% vacuum and the manifold pressure apply to both sides of the sensor respectively, this sensor can output analog signal by using the silicon variation proportional to pressure change.

Schematic diagrams
Circuit Diagram

Harness Connector

Repair procedures
Inspection
1.

Connect the KDS on the Data Link Connector (DLC).

2.

Measure the output voltage of the MAPS at idle and IG ON.

Pressure
[kPa (kgf/cm², psi)]
Output Voltage (V)
32.5 (0.33, 4.71)
0.5
284 (2.90, 41.19)
4.5

Removal & Installation
1.

Turn the ignition switch OFF and disconnect the battery negative (-) terminal.

2.

Disconnect the manifold absolute pressure sensor connector (A).

3.

Remove the sensor (B) from the Intake manifold by loosening the mounting bolts.

Manifold absolute pressure sensor mounting bolt:

9.8 - 11.8 N·m (1.0 - 1.2 kgf·m, 7.2 - 8.7 lb·ft)

4.

Install in the reverse order of removal.

  

Tighten the component with the specified torques.

Note that internal damage may occur when the component is dropped. If the component has been dropped, if it is damaged inspect before installing.

Insert the sensor in the installation hole and be careful not to damage.

ETC (Electronic Throttle Control) System
Specifications Specification Throttle angle(°) Output Voltage (V) TPS1 TPS2 0 0.5 4.5 ...

Intake Air Temperature Sensor (IATS)
Specifications Specification Temperature Resistance (kΩ) °C °F -40 -40 40.93 - 48.35 ...

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