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. Based on the fuel pressure measured by the FPS and the amount of fuel consumed, the Fuel Pump Control Module (FPCM) determines whether to activate the low-pressure fuel pump. After the low-pressure fuel pump is activated, the FPS continues to provide fuel pressure information to the FPCM, and the FPCM continues to control the fuel flow rate using the feedback information from the FPS.

Specifications

Specification

Pressure [kPa (kgf/cm², psi)]	Output voltage (V)
50 (0,51, 7,3)	0,3
600 (6,12, 87,0)	2,5
1100 (11,2, 159,5)	4,5

Circuit Diagrams

Wiring Diagram

Terminal Illustration

Terminal Function

No	Function	Connected To
1	Fuel Pressure Sensor (FPS) Power Supply	Fuel Pump Control Module (FPCM)
2	Fuel pressure sensor (FPS) signal input	Fuel Pump Control Module (FPCM)
3	Fuel Pressure Sensor (FPS) Odor	Fuel Pump Control Module (FPCM)

Repair Procedures

Inspection

1. 1
   Connect the diagnostic tool to the Data Link Connector (DLC).
2. 2
   Check the output voltage of the Fuel Pressure Sensor (FPS).

Pressure [kPa (kgf/cm², psi)]	Output voltage (V)
50 (0,51, 7,3)	0,3
600 (6,12, 87,0)	2,5
1100 (11,2, 159,5)	4,5

Removal

1. 1
   Release the residual fuel pressure in the fuel line. (Refer to Fuel System - "Release Residual Fuel Pressure in Line")
2. 2
   Remove the floor carpet service cover (A).

   

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

   

4. 4
   Disconnect the fuel pressure sensor connector (A).
5. 5
   Remove the fuel pressure sensor lock pin (B).

   

6. 6
   Remove the fuel pressure sensor from the fuel pump.

   

Installation

1. Install in the reverse order of removal.