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 installed inside the low-pressure fuel pump. The module continuously compares the fuel pressure information measured by the fuel pressure sensor (FPS) with the target fuel pressure information provided by the ECM and generates the desired target fuel pressure by controlling the fuel pump motor and regulating the fuel supply in the line between the low-pressure fuel pump and the high-pressure fuel pump.

Operation

1. 1
   The ECM transmits the target fuel pressure information to the FPCM via the CAN network.
2. 2
   The FPS provides the FPCM with information on the actual fuel pressure in the low-pressure fuel line between the low-pressure and high-pressure fuel pumps, and the FPCM transmits this information to the ECM. The FPCM also diagnoses faults in the FPCM, fuel pump motor and FPS, and then transmits the diagnostic information to the ECM.
3. 3
   The FPCM compares the actual pressure information measured by the FPS with the target fuel pressure information provided by the ECM, and controls the voltage supplied to the low-pressure fuel pump motor. The FPCM continuously regulates constant fuel supply by controlling the low-pressure fuel pump depending on engine speed (rpm) and vehicle load.

Specifications

Specification

Item	Specification
Applied Voltage (V)	6~18
Current Consumption (A)	15 max.
Fuel Pressure	Shipping	Max. 600 kPa (Max. 6.1 kgf/cm², Max. 87.0 psi)
	During operation	350–500 kPa (3.5–5.1 kgf/cm², 50.7–72.5 psi)

Circuit Diagrams

Wiring Diagram

Terminal Illustration

TERMINAL FUNCTION

Pin No.	Description
1	Fuel Level Sensor Ground
2	Fuel pressure sensor (FPS) input signal
3	Fuel pressure sensor (FPS) ground (-)
4	Ground
5	CAN "LOW"
6	FUEL GAUGE SENDER
7	-
8	Fuel pressure sensor (FPS) power supply (+5V)
9	CAN "HIGH"
10	Battery Power (B+)

Repair Procedures

DEPOSIT

1. 1
   Release the residual pressure in the fuel line. (Refer to Fuel System - Repair Procedures - Releasing Residual Pressure in the Fuel Line)
2. 2
   Remove the rear seat. (Refer to Body - Rear Seat)
3. 3
   Remove the fuel pump service cover (A).

   

4. 4
   Disconnect the fuel pump control module connector (B).
5. 5
   Disconnect the fuel pressure sensor (FPS) connector (B).
6. 6
   Disconnect the quick connector (C) from the fuel supply hose.

   

7. 7
   Remove the lock ring (A) using the special service tool [No.: 09310-B8100].