Fuel System - Overview

Overview

NOTE: Repairs of the fuel system are to be achieved only by replacement of the failed component(s). Repair of a fuel system component should not be attempted.

NOTE: If directed during assembly of fuel system components, lubricate any seal(s) only with 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 an integrated bundle assembly.
A single container (L-shaped) fuel tank for FWD.
A saddle type fuel tank for AWD.
Quick connect fuel and vapor tube couplings.
A fuel tank filler pipe assembly, which cannot be modified in any way, that also contains a restrictor plate to permit only unleaded fuel to be pumped into the tank.
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.
A supplemental refueling adapter located in the luggage compartment.
A Fuel Pump Control Module (FPCM) located on the fuel tank.
A Closed Loop Pressure Control (CLPC) system, which consists of a mechanical returnless fuel system (MRFS) that uses a Low Fuel Pressure Sensor (FPS) mounted directly to the liquid fuel line in addition to a High Fuel Pressure Sensor. The Low Fuel Pressure Sensor provides the Powertrain Control Module (PCM) a fuel pressure reading between the Fuel Pump Module and the High Pressure (HP) Pump (low side) This allows the PCM to calculate the fuel volume/pressure demand from the Fuel Pump Module more precisely to prevent over-running of the fuel pump. (a fuel economy benefit).
A Fuel Pump (FP) module containing:
- The electric FP module which provides pressurized fuel to the high pressure FP.
- The fuel level sensor.
- A check valve which maintains system pressure after the pump is shut off.
- A pressure relief for overpressure protection in the event of restricted fluid flow.
- A lifetime fuel filter providing filtration to protect the fuel injectors from foreign material.

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.