Kia Stinger: Engine Control System / Rail Pressure Sensor (RPS)

Kia Stinger CK 2018-2021 Service Manual / Engine Control / Fuel System / Engine Control System / Rail Pressure Sensor (RPS)

Specifications
Specification

Pressure
Output Voltage (V) [Vref=5V]
bar
[MPa (kgf/cm², psi)]
0
0 (0, 0)
0.5
140
14 (142, 2031)
2.5
280
28 (286, 4061)
4.5

Description and operation
Description

Installed on the delivery pipe, the Rail Pressure Sensor (RPS) measures the instantaneous fuel pressure in the delivery pipe. The sensing element (semiconductor element) built into the sensor converts the pressure to voltage signal. By using this signal, the ECM controls the correct injection amount and timing and adjusts the fuel pressure with the fuel pressure regulator valve if the actual pressure calculated by the RPS output signal is different from the target pressure.

Schematic diagrams
Circuit Diagram

Harness Connector

Repair procedures
Inspection
1.

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

2.

Measure the output voltage and fuel pressure of the RPS at idle and various engine speed.

Pressure
Output Voltage (V) [Vref=5V]
bar
[MPa (kgf/cm², psi)]
0
0 (0, 0)
0.5
140
14 (142, 2031)
2.5
280
28 (286, 4061)
4.5

Removal
1.

Release the residual pressure in fuel line.

(Refer to the Fuel Delivery System - "Release Residual Pressure in Fuel Line")

2.

Switch "OFF" the ignition and disconnect the negative (-) battery terminal.

3.

Remove the intake manifold.

(Refer to Engine Mechanical System - “Intake Manifold”)

4.

Remove the delivery pipe foam (A).

5.

Disconnect the rail pressure sensor connector (A), and then remove the sensor (B) from the delivery pipe.

Installation
  

Install the component to the specified torques.

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

1.

Install in the reverse order of removal.

Troubleshooting
Signal Waveform

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