Hyundai Ioniq: Fuel Delivery System / Fuel Pump Control Module (FPCM). Repair procedures

Hyundai Ioniq (AE) 2017-2024 Service Manual / Engine Control/Fuel System / Fuel Delivery System / Fuel Pump Control Module (FPCM). Repair procedures

Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Remove the rear seat cushion.
(Refer to Body - "Rear Seat Assembly")
3.
Remove the fuel pump service cover (A).

   
When reinstalling a protective cover for a fuel pump, remove the existing butyl tape and apply a new one.
Before assembling the protective cover, ensure that the temperature of the butyl is about 30°C using a hair dryer or a heat gun.

   
When installing the protective cover for the fuel pump, pay attention to the installation direction of the grommet and the protective cover.
The arrow (A) should be in the forward direction of the car.
Align the bulging part of the vehicle body (B) with the hole of the protective cover.
Align the bulging part of the grommet (C) with the bulging part of the protective cover.

4.
Disconnect the fuel pump control module connector (A).
5.
Disconnect the fuel pressure sensor connector (B).
6.
Disconnect the fuel feed tube quick-connector (C).

7.
Remove the fuel pump locking ring (B) with SST (A) [SST.: 09310-F3100].
   
When removing the plate cover, be careful not to damage the fuel tank and fuel pump.
When removing the plate cover, press the upper area with hand and rotate the wrench counter clockwise.

Installation
1.
Install in the reverse order of removal.
Inspection
1.
Connect the GDS to the vehicle's data link connector (DLC).
2.
Check any DTCs and if exist, repair according to the DTC guide.
3.
Check the power supply voltage provided to the fuel pressure sensor (FPS).
Specification : 5V

4.
Check the voltage provided to the fuel pressure sensor (FPS) at idle.
Specification : 1.9 - 3.2V

5.
Check the fuel pressure in the low fuel line.
(Refer to Fuel Delivery System - "Fuel Pressure Test")
Items
Specification
Start
Max. 600 KPa
(Max. 6.1 kgf/cm², Max. 87.0 psi)
In Operation
350 - 500 KPa
(3.5 - 5.1 kgf/cm², 50.7 - 72.5 psi)

    Fuel Pump Control Module (FPCM). Schematic diagrams

    C..

    Fuel Pressure Sensor (FPS). Description and operation

    DescriptionThe 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...

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