Description and Operation - Fuel System - Overview

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.

The fuel system consists of:

• Fuel, vapor and brake tubes in a single bundle.
• Saddle-type fuel tank.
• Quick-connect fuel and vapor tube couplings.
• Fuel tank filler neck assembly that cannot be modified in any way, which also contains a restrictor plate that allows only unleaded gasoline to be added to the tank.
• Easy Fuel™ fuel tank filler pipe (without cap) that cannot be modified in any way and is serviced only by replacing the fuel tank filler neck.
• Auxiliary fuel fill adapter located in the luggage compartment.
• The fuel pump control module is located in the luggage compartment.
• Non-serviceable fuel level sensor located on the right side of the fuel tank.
• Mechanical Non-Returnable Fuel System (MRFS)
• Fuel pump module (FP) containing:
  • Electric fuel pump supplies pressurized fuel to the fuel rail.
  • Fuel level sensor.
  • Check valve that maintains system pressure after the pump is switched off.
  • Pressure relief valve that protects against excessive pressure if fuel flow is restricted.
  • Lifetime fuel filter that filters fuel to protect the fuel injectors from foreign material.

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 function provides other vehicle subsystems with information on restraint system deployment or fuel shut-off status. When an impact exceeding a predetermined threshold occurs, the RCM sends a signal over a dedicated circuit to the BCM. The BCM then sends a signal over a second wire circuit to the PCM, which initiates fuel shut-off and disables the fuel system.

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.