Fuel System - Overview. Description and Operation

Overview

NOTICE: Fuel system repairs must only be made by replacing the failed component(s). Do not attempt to repair fuel system components.

NOTICE: If specified during fuel system component assembly, lubricate any seals only with the specified material. Failure to follow this instruction may result in seal failure and fuel leakage.

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 (L-shaped) fuel tank.
• has a fuel level sensor.
• has a fuel pump that operates at 5.5 or 13 volts depending on load, which supplies fuel under pressure to the fuel pump pressure.
• 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 a high-pressure fuel pump that delivers a small volume of fuel at high pressure to the fuel rails.
• has an FPDM located at the bottom of the driver-side C-pillar.
• has fuel lines (liquid and vapor) routed together with the brake lines on the underbody in a bundle.
• has a high-pressure fuel tube from the high-pressure fuel pump to the fuel rail.
• Uses individually controlled fuel injectors for each cylinder. The fuel injectors are installed directly in the cylinder head.
• Pressurized fuel is supplied to the fuel injectors from the high-pressure fuel pump through the fuel rail.
• Has a fuel level sensor installed on the fuel pump module.
• Has a fuel pressure sensor integrated into the liquid fuel line (fuel rail kit).
• Has an integrated fuel pressure sensor in the fuel tank.
• External fuel filter (if equipped).

Fuel pump shut-off function

The event notification feature provides other vehicle subsystems with information related to SRS deployment or fuel shutoff status. When an impact exceeding a predetermined threshold occurs, the RCM sends a signal to the BCM over a dedicated circuit.

When the BCM receives a fault input signal from the RCM, the BCM initiates fuel shutoff by removing the ground signal from the fuel pump relay, and also sends a signal to the PCM over a dedicated circuit, disabling the fuel system.

After the fuel system has been disabled, the vehicle can be restarted by performing the following steps:

• Turn the ignition OFF.
• Turn the ignition to the START position (on vehicles with a pushbutton start, press the START/STOP button while depressing the brake pedal).
• Turn the ignition OFF.
• Turn the ignition on.