Module, Fuel Pump: Operation

An electric fuel pump is located within the fuel pump module. The electric fuel pump is a positive displacement, immersible pump with a permanent magnet electric motor capable of creating 860 kPa (125 psi) of operating pressure. The fuel pressure regulator to 580 kPa (84.1 psi) during cranking and 520 kPa (75.4 psi) during normal operation.

The fuel tank sending unit is continually monitored by the Body Control Module (BCM), to determine the level of fuel in the tank. This information is available to other vehicle control modules via the Controller Area Network (CAN) data bus. Fuel level sensor diagnosis is conducted as part of the BCM circuitry.

The fuel gauge is controlled by the instrument cluster circuit board based upon cluster programming and a CAN bus input received from the BCM.