Fuel Pump Module

The fuel pump module is mounted inside the fuel tank and contains the following components:

• Mounting flange.
• Electric fuel pump.
• Fuel pump reservoir.
• Inlet strainer.
• Fuel pressure regulator.
• Fuel level sending unit.
• Fuel filter.
• Fuel control module.

The fuel pump activation is managed by the Powertrain Control Module (PCM) through the fuel pump relay in the Power Distribution Center (PDC). The control module is integrated onto the fuel pump assembly. The fuel control module is not serviced separately. The module is a smart device but has no communication with the PCM. It operates in accordance with a preset calibration. Initially the pressure is approximately 4.5 bar (63 psi) for about 0.5 seconds, then regulates at 4 bar (58 psi) normally with no faults present. The fuel pump module has its own internal pressure sensor and temperature sensor and performs its own diagnostics on the internal components. If the fuel control module detects a fault, it will default to max pressure (100%) 4.5 bar (63-65 psi). The pump can operate at the max pressure indefinitely without any driveability issues. The PCM will compensate for the higher than normal fuel pressure. The fuel level sending unit is the only serviceable component of the fuel pump module. If the electric fuel pump, fuel pressure regulator or fuel filter requires service, the fuel pump module must be replaced as an assembly.