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

Hyundai Palisade (LX2) 2020-2025 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.

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.

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).

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

4.	Disconnect the fuel pump control module connector (A) and fuel pressure sensor connector (B).

5.	Disconnect fuel feed tube quick-connector (C).

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

•	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.

Installation

1.	Install in the reverse order of removal.

Fuel Pump

Repair procedures Inspection 1. Turn ignition switch OFF and disconnect the negative (-)battery cable. 2...

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...

Other information:

Hyundai Palisade (LX2) 2020-2025 Service Manual: Troubleshooting

Troubleshooting Symptom Possible cause Remedy Hard steering Improper front wheel alignment Correct Excessive turning resistance of lower arm ball joint Replace Low tire pressure Adjust No power assist Repair and replace Poor return of steering wheel to center Improper front wheel alignment Correct Poor or rough ride Improper front wheel alignment Correct Malfunctioning shock absorber Repair or replace Broken or worn stabilizer Replace Broken or worn coil spring Replace Worn lower arm bushing Replace the lower arm assembly Abnormal tire wear Improper front wheel alignment Correct Improper tire pressure Adjust Malfunctioning shock absorber Replace Wandering Improper front wheel alignment Correct Poor turning resistance of lower arm ball joint Repair Loose or worn lower arm bushing Retighten or replace Vehicle pulls to one side Improper front wheel alignment Correct Excessive turning resistance of lower arm ball joint Replace Broken or worn coil spring Replace Bent lower arm Repair Steering wheel shimmy Improper front wheel alignment Correct Poor turning resistance of lower arm ball joint Replace Broken or worn stabilizer Replace Worn lower arm bushing Replace Malfunctioning shock absorber Replace Broken or worn coil spring Replace Bottoming Broken or worn coil spring Replace Malfunctioning shock absorber Replace Wheel /tire noise, vibration and harshness concerns are directly related to vehicle speed and are not generally affected by acceleration, coasting or decelerating...

Hyundai Palisade (LX2) 2020-2025 Service Manual: Specifications

Specifications Items Specifications Rated voltage DC -40V Operating voltage DC -40V Operating temperature -40°C to 85°C (-22°F to 185°F) parastic current 4...