Fuel Pump Module
| Refer to COMPONENT INDEX . |
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
The fuel pump activation is managed by the PCM and the FPCM. The system uses PWM signal to control the fuel Pump based on actual need of fuel to the engine, at any given time. PWM control cycles the power to the pump ON and OFF. The duty cycle is the ratio of ON time to OFF time. 100% PWM means the pump is powered ON continuously; 50% means the pump is powered ON and OFF for equal amounts of time. The pump coasts through the OFF times. It doesn't actually stop rotating because the frequency of the cycling is too high.
The fuel level sending unit is the only serviceable component of the primary fuel pump module. If the electric fuel pump, fuel pressure regulator or fuel filter requires service, the primary fuel pump module must be replaced as an assembly.
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's operating range is 400 kPa (58 psi) to 552 kPa (80 psi).