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 (Mechanical Returnless Fuel System) (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 (Fuel Pump) , which provides pressurized fuel to the fuel rail.
- a serviceable fuel level sender.
- a check valve, which maintains system pressure after the FP (Fuel Pump) 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 (Fuel Pump) control module (2.5L and 3.0L vehicles).
- an individual fuel level sensor, AWD (All-Wheel Drive) 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 (Fuel Pump) 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 (Fuel Pump) control module. Signal communication between the RCM (Restraints Control Module) and the FP (Fuel Pump) control module allows the PCM to shutoff the FP (Fuel Pump) 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 (Fuel Pump) module is controlled by the PCM. Electrical power to the FP (Fuel Pump) module is provided through the IFS (Inertia Fuel Shutoff) switch that will de-energize the fuel delivery secondary circuit in the event of a moderate to severe collision. The IFS (Inertia Fuel Shutoff) 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 (Inertia Fuel Shutoff) switch, then turn the ignition to the ON position.