Fuel System - Overview. Description and Operation

Overview

Fuel System:

• is a Closed Loop Pressure Control (CLPC) variable speed fuel system with a Gasoline Turbocharged Direct Injection (GTDI) engine.
• uses a single-tank fuel tank.
• has a high-pressure fuel pump that delivers a small volume of fuel at high pressure to the fuel rails.
• has an in-tank fuel pump (FP) and sender unit that delivers pressurized fuel to the fuel rail.
• has a lifetime fuel filter (serviced as part of the fuel pump).
• has an Easy Fuel™ (capless) fuel tank filler neck assembly that cannot be modified in any way and is serviced only by installing a new fuel tank filler neck.
• has an optional refueling adapter located in the luggage compartment.
• has an FP module that operates on 10 or 12 volts depending on load, and delivers pressurized fuel to the fuel rail.
• has fuel lines (liquid and vapor) routed together with the brake lines on the underbody in a bundle.
• uses individually controlled fuel injectors for each cylinder. The injectors are installed in the intake manifold and receive fuel under pressure from the high-pressure fuel pump through the fuel rail.
• has a fuel level sensor that is integral to the fuel pump sender unit.

Fuel pump shut-off function

In a moderate or severe collision, the vehicle is equipped with a fuel pump and sensor shut-off function, which initiates an event notification signal.

The event notification signal is a signal sent from the RCM to the FPDM. Communication between the RCM and FPDM allows the PCM to disable the fuel pump.

If the vehicle shuts down after a collision because of this function, the vehicle can be restarted by first turning the ignition to the OFF position and then turning the ignition to the ON position. In some cases the vehicle may not start on the first attempt and one additional ignition cycle may be required.