Hyundai Palisade: Engine Control System / Rail Pressure Sensor (RPS)

Hyundai Palisade (LX2) 2020-2024 Service Manual / Engine Control/Fuel System / Engine Control System / Rail Pressure Sensor (RPS)

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 in the sensor converts the pressure to voltage signal. By using this signal, the ECM can control correct injection amount and timing and adjust the fuel pressure with the fuel pressure regulator valve if the target pressure is different from the actual pressure calculated by the RPS output signal.

Hyundai Palisade. Description and operation

Specifications
Specification
▷ Type : Piezo-electricity type
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

Hyundai Palisade. Specifications

Troubleshooting
Signal Waveform

Hyundai Palisade. Troubleshooting

Schematic diagrams
Circuit Diagram

Hyundai Palisade. Schematic diagrams

Harness Connector

Hyundai Palisade. Schematic diagrams

Repair procedures
Inspection
1.
Connect the diagnostic tool on the Data Link Connector (DLC).
2.
Measure the output voltage 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 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.
Disconnect the rail pressure sensor connector (A), and then remove the sensor (B) from the delivery pipe.
Rail Pressure Sensor :
29.4 - 34.3 N.m (3.0 - 3.5 kgf.m, 21.7 - 25.3 lb-ft)

Hyundai Palisade. Repair procedures

Installation
Hyundai Palisade. Repair procedures   
Install the component to the specified torque.
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.

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