Fuel Tank and Lines

Fuel Tank and Lines

Fuel System

The fuel system consists of:

- a single-speed Mechanical Returnless Fuel System (MRFS) (3.5L vehicles).
- a 2-speed MRFS (2.5L and 3.0L vehicles).
- an All-Wheel Drive (AWD) saddle-type or Front Wheel Drive (FWD) L-shaped fuel tank.
- an Easy Fuel(TM) (capless) fuel tank filler pipe assembly, which cannot be modified in any way.
- a Fuel Pump (FP) module containing:
- an electric FP, which provides pressurized fuel to the fuel rail.
- a serviceable fuel level sender.
- a check valve, which maintains system pressure after the FP is shut off.
- a pressure relief valve for overpressure protection in the event of restricted fuel flow.
- a lifetime fuel filter providing filtration to protect the fuel injectors from foreign material.

- fuel, vapor and brake tubes in an integrated bundle assembly attached to the underside of the vehicle by retaining clips.
- has a supplemental refueling adapter located in the luggage compartment.
- an Inertia Fuel Shutoff (IFS) switch (3.5L vehicles).
- a FP control module (2.5L and 3.0L vehicles).
- an individual fuel level sensor, AWD vehicles only.

Fuel System Shutoff Feature

2.5L and 3.0L vehicles

In event of a moderate to severe collision, the vehicle is equipped with a FP shutoff feature that is initiated by the event notification signal. The event notification signal is provided by the Restraints Control Module (RCM) to the FP control module. Signal communication between the RCM and the FP control module allows the PCM to shutoff the FP module. Should the vehicle shut off after a collision due to this feature, restart the vehicle 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 restart the first time and may take an additional attempt.

3.5L vehicles

The FP module is controlled by the PCM. Electrical power to the FP module is provided through the IFS switch that will de-energize the fuel delivery secondary circuit in the event of a moderate to severe collision. The IFS switch is a safety device, located under the RH front door scuff plate. Should the vehicle shutoff after a collision due to this feature, restart the vehicle by first turning the ignition OFF, push the reset button on the IFS switch, then turn the ignition to the ON position.