Hyundai i-30: Fuel Delivery System / Fuel Pressure Sensor (FPS)

Hyundai i30 (PD) 2018-2025 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.

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

Schematic diagrams

Circuit Diagram

Terminal Illustration

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).

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.	Turn the ignition switch OFF, and then remove battery (-) terminal.

2.	Remove the rear seat cushion. (Refer to Body (Interior and Exterior) - "Rear Seat Assembly")

3.	Remove the fuel pump service cover (A).

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

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

6.	Remove the fuel pressure sensor (B) from the fuel pump.

Installation

1.	Install in the reverse order of removal.

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