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

Kia Picanto JA 2017-2022 Service & Repair Manual / Engine Control / Fuel System / Engine Control System / Manifold Absolute Pressure Sensor (MAPS)

Specifications
Specification
Pressure
[kPa (kgf/cm², psi)]
Output Voltage (V) [Vref=5V]
32.5 (0.33, 4.71)
0.5
284 (2.90, 41.19)
4.5

Description and operation
Description
Installed on the surge tank, Manifold Absolute Pressure Sensor (MAPS) is a speed-density type sensor that 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 amount and engine speed.
The MAPS consists of a piezo-electric element and a hybrid IC amplifying the element output signal. This element, a silicon diaphragm type, features pressure sensitive variable resistor effect of semi-conductor. Due to 100% vacuum status and manifold pressure applied to both sides of the sensor, this sensor can output analog signal by using the silicon variation proportional to pressure change.

Schematic diagrams
Circuit Diagram
[A/T]

[M/T]

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) [Vref=5V]
32.5 (0.33, 4.71)
0.5
284 (2.90, 41.19)
4.5

Removal
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 screws.
Manifold absolute pressure sensor mounting screw :
6.4 - 8.3 N·m (0.65 - 0.85 kgf·m, 4.7 - 6.1 lb·ft)

Installation
   
Tighten the component to 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.
Carefully insert the sensor into the installation hole without damaging it.
1.
Install in the reverse order of removal.
Troubleshooting
Signal Waveform

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Specifications Specification Sensor Item Opening Percentage (%) Output Voltage (V) [Vref = 5V] ...

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