Hyundai i-30: Fuel Delivery System / Fuel Pump Control Module (FPCM)

Hyundai i30 (PD) 2018-2024 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.

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.

Schematic diagrams

Circuit Diagram

Terminal Illustration

Terminal Function

Pin No	Description	Connected to
1	Fuel sender ground (-)	Fuel Pump
2	Fuel pressure sensor signal input	Fuel pressure sensor (FPS)
3	Fuel pressure sensor ground (-)	Fuel pressure sensor (FPS)
4	Ground (-)	Chassis Ground
5	CAN [Low]	ECM
6	Fuel sender signal (+)	Fuel Pump
7	-
8	Fuel pressure sensor power supply (+5V)	Fuel pressure sensor (FPS)
9	CAN [High]	ECM
10	Battery power (B+)	Fuel Pump Relay

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

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

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.	Disconnect the vapor hose quick-connector (D).

8.	Remove the locking ring (A) by using the special service tool [No.: 09310-F3100].

9.	Remove the fuel pump from the fuel tank.

Fuel Pressure Regulator

Repair procedures Removal 1. Remove the fuel pump. (Refer to Fuel Delivery System - "Fuel Pump") 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...

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