Hyundai Palisade: Fuel Delivery System / Fuel Pressure Sensor (FPS)

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

Description and operation
Description
The fuel pressure sensor (FPS) is installed on the top of the low pressure fuel pump and measures the pressure in the low pressure fuel line. Based on the fuel pressure measured by the FPS and the amount of fuel consumed, the fuel pump control module (FPCM) determines whether to activate the low pressure fuel pump. After activating the low pressure fuel pump, the FPS continues to provide the fuel pressure information to the FPCM and the FPCM keeps controlling the fuel flow rate using the feedback information from the FPS.

Hyundai Palisade. Description and operation

Specifications
Specification
Pressure
[kPa (kgf/cm², psi)]
Output Voltage (V)
50 (0.51, 7.3)
0.3
600 (6.12, 87.0)
2.5
1100 (11.2, 159.5)
4.5

Hyundai Palisade. Specifications

Schematic diagrams
Circuit Diagram

Hyundai Palisade. Schematic diagrams

Terminal Illustration

Hyundai Palisade. Schematic diagrams

Terminal Function
No
Function
Connected to
1
Fuel Pressure sensor (FPS) power supply
Fuel Pump Control Module (FPCM)
2
Fuel Pressure sensor (FPS) signal input
Fuel Pump Control Module (FPCM)
3
Fuel Pressure sensor (FPS) groun
Fuel Pump Control Module (FPCM)

Repair procedures
Inspection
1.
Connect the diagnostic tool on the Data Link Connector (DLC).
2.
Check the output voltage of fuel pressure sensor (FPS).
Pressure
[kPa (kgf/cm², psi)]
Output Voltage (V)
50 (0.51, 7.3)
0.3
600 (6.12, 87.0)
2.5
1100 (11.2, 159.5)
4.5

Removal
1.
Release the residual pressure in fuel line.
(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel Line")
2.
Remove the floor carpet service cover (A).

Hyundai Palisade. Repair procedures

3.
Remove the fuel pump service cover (A) after loosening the mounting screws.

Hyundai Palisade. Repair procedures

4.
Disconnect the fuel pressure sensor connector (A).
5.
Remove the fuel pressure sensor fixing pin (B).

Hyundai Palisade. Repair procedures

6.
Remove the fuel pressure sensor from the fuel pump.

Hyundai Palisade. Repair procedures

Installation
1.
Install in the reverse order of removal.

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