Kia Stinger: Fuel Delivery System / Fuel Pump Control Module (FPCM)

Kia Stinger CK 2018-2020 Service Manual / Engine Control / Fuel System / Fuel Delivery System / Fuel Pump Control Module (FPCM)

Description and operation
Description

Installed on the righthand side of the fuel tank, the fuel pump control module (FPCM) 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 sends target fuel pressure to the FPCM via CAN network.

2.

The FPS sends the actual pressure of the low pressure fuel line between the low and high pressure fuel pumps to the FPCM, and the FPCM forwards this to the ECM. Also, the FPCM diagnoses faults in the FPCM, fuel pump motor and FPS and then sends the diagnostic information to the ECM.

3.

The FPCM compares the actual fuel pressure measured by the FPS with the target fuel pressure provided by the ECM and controls the voltage 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 Information
Terminal Illustration

Terminal Function

Pin No.
Description
Connected to
1
Battery power (B+)
Fuel Pump Relay
2
Fuel Pump (U)
Low pressuer fuel pump
3
Fuel Pump (V)
Low pressuer fuel pump
4
Fuel Pump (W)
Low pressuer fuel pump
5
CAN [Low]
Other control module
6
CAN [High]
Other control module
7
Ground (-)
Chassis Groung
8
Fuel Pump shield (Ground)
Chassis Groung
9
Fuel pressure sensor (FPS) ground (-)
Fuel pressure sensor (FPS)
10
Fuel pressure sensor (FPS) signal input
Fuel pressure sensor (FPS)
11
-
-
12
Fuel pressure sensor (FPS) power supply [+5V]
Fuel pressure sensor (FPS)

Repair procedures
Removal
1.

Switch "OFF" the ignition and disconnect the negative (-) battery terminal.

2.

Remove the rear transverse trim.

(Refer to Body (Interior and Exterior) - "Rear Pillar Trim")

3.

Remove the luggage side trim.

(Refer to Body (Interior and Exterior) - "Luggage Side Trim")

4.

Disconnect the fuel pump control module connector (A).

5.

Remove the mounting nuts (B), and then remove the fuel pump control module (C) from the vehicle.

Installation
1.

Install in the reverse order of removal.

Inspection
1.

Connect the KDS to the vehicle's data link connector (DLC).

2.

Check for DTCs and repair any according to the DTC guide.

3.

Check the power supply voltage provided to the fuel pressure sensor (FPS). [9 and 12]

Specification: 5V

4.

Check the voltage provided to the fuel pressure sensor (FPS) at idle. [9 and 10]

Specification: 1.9 - 3.2 V

5.

Check the fuel pressure in the low fuel line.

(Refer to Fuel Delivery System - "Fuel Pressure Test")

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