Hyundai Palisade: Fuel Delivery System / Fuel Pump Control Module (FPCM)

Hyundai Palisade (LX2) 2020-2024 Service Manual / Engine Control/Fuel System / Fuel Delivery System / 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. The module compares instantaneous fuel pressure information measured by the fuel pressure sensor (FPS) with target fuel pressure information provided by the ECM and generates the desired target fuel pressure by controlling the fuel pump motor and regulating fuel flow rate in the low pressure fuel line between the low and high pressure fuel pumps.

Hyundai Palisade. Description and operation

Operation

Hyundai Palisade. Description and operation

1.
The ECM provides target fuel pressure information to the FPCM via CAN network.
2.
The FPS provides the FPCM with actual pressure information of the low pressure fuel line between the low and high pressure fuel pumps, and the FPCM forwards the information to the ECM. Also, the FPCM diagnoses faults in the FPCM, fuel pump motor and FPS and then provides the diagnosis information to the ECM.
3.
The FPCM compares the actual fuel pressure information measured by the FPS with the target fuel pressure information provided by the ECM and controls the voltage that is provided to the low pressure fuel pump motor. The FPCM keeps regulating fuel flow rate by controlling the low pressure fuel pump, depending on engine speed (rpm) and vehicle loads.
Specifications
Specification
Items
Specification
Applied Voltage (V)
6 - 18
Current Consumption (A)
Max. 15
Fuel Pressure
Start
Max. 600 KPa (Max. 6.1 kg/cm², Max. 87.0 psi)
In operation
350 - 500 KPa (3.5 - 5.1 kg/cm², 50.7 - 72.5 psi)

Repair procedures
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 pump control module connector (A) and fuel pressure sensor connector (B).
5.
Disconnect fuel feed tube quick-connector (C).

Hyundai Palisade. Repair procedures

6.
Remove the locking ring (A) by using the special service tool [No.: 09310-B8100].
Hyundai Palisade. Repair procedures   
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.

Hyundai Palisade. Repair procedures

7.
Remove the fuel pump from the fuel tank.

Hyundai Palisade. Repair procedures

Installation
1.
Install in the reverse order of removal.

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    Fuel Pressure Sensor (FPS)

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