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

Hyundai i30 (PD) 2018-2024 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.

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).
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.
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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