Fuel Tank: Description and Operation

FUEL TANK AND LINES

The fuel pump assembly consists of:
- the electric fuel pump which provides pressurized fuel to the engine.
- the fuel level sensor.
- the fuel pump inlet filter (filter sock).
- a check valve which maintains system pressure after the pump is shut off.
- a parallel pressure relief valve (with bleed port) which maintains fuel in the system after the fuel pump is shut off.
- a fuel pump driver module (FPDM) that controls the fuel pump based on input received from the powertrain control module (PCM).

Electrical power to the pump is supplied through the inertia fuel shutoff (IFS) switch.