Fuel System - Overview: Overview

The fuel system:

• is a two-speed mechanical returnless fuel system (MRFS)
• uses a single container fuel tank.
• has a Fuel Pump that operates on 6-12 volts depending on load, that supplies fuel under pressure to the high pressure Fuel Pump.
• has a lifetime fuel filter (serviced as part of the Fuel Pump and Sender Unit).
• has an Easy Fuel™ (capless) fuel tank filler pipe assembly, which cannot be modified in any way and is serviced only by the installation of a new fuel tank filler pipe assembly.
• has a supplemental refueling adapter located in the glove compartment.
• has a high pressure Fuel Pump that supplies high pressure, low volume fuel pressure to the fuel rails.
• has a Fuel Pump Control Module located on the frame in front of the fuel tank.
• has fuel tubes (liquid and vapor) mounted on the underside of the vehicle.
• uses separately controlled fuel injectors for each cylinder. The fuel injectors are mounted directly into the head.
• fuel injectors are supplied with pressurized fuel from the high pressure Fuel Pump to the fuel rail.
• has a serviceable fuel level sender mounted on the Fuel Pump and Sender Unit.

Fuel Pump Shut-off Feature 

In the event of a moderate to severe collision, the vehicle is equipped with a Fuel Pump and Sender Unit Shut-off Feature that is initiated by the event notification signal.

The event notification signal is a signal provided by the RCM to the Fuel Pump Control Module. Signal communication between the RCM and the Fuel Pump Control Module allows the PCM to shut-off the Fuel Pump.

Should the vehicle shut off after a collision due to this feature, the vehicle may be restarted by first turning the ignition to the OFF position and then turn the ignition to the ON position. In some instances the vehicle may not start the first time and may take one additional ignition cycle.