Hyundai Palisade (LX2): Fuel Delivery System / Fuel Pressure Sensor (FPS)

Hyundai Palisade (LX2) 2020-2026 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).

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

4.	Disconnect the fuel pressure sensor connector (A).

5.	Remove the fuel pressure sensor fixing pin (B).

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

Installation

1.	Install in the reverse order of removal.

❮Fuel Pump Control Module (FPCM)

Description and operation Description The fuel pump control module (FPCM) is installed on the right side of the fuel tank and controls the DC motor mounted inside the low pressure fuel pump.

Fuel Filter❯

Repair procedures Removal 1. Remove the fuel pump. (Refer to Fuel Delivery System - "Fuel Pump") 2.

Other information:

Hyundai Palisade (LX2) 2020-2026 Service Manual: Troubleshooting

Troubleshooting 1) After replacing H/UNIT, always check that the system operates properly. 2) If the failure persists after replacing the H/UNIT, do not replace the unit.

Hyundai Palisade (LX2) 2020-2026 Service Manual: Parking/View Switch

Repair procedures Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the floor console upper cover. (Refer to Body - "Floor Console Assembly") 3.