Fuel System

Fuel System

Fuel System

The fuel system consists of the:

- All-Wheel Drive (AWD) saddle-type or Front Wheel Drive (FWD) L-shaped fuel tank.
- Fuel Pump (FP) module.
- fuel level sensor assembly (saddle-type fuel tank).
- fuel level sender (mounted on the FP module and, if equipped, on the fuel level sensor assembly).
- Easy Fuel(TM) (capless) fuel tank filler pipe assembly.
- FP control module on 2.5L and 3.0L vehicles.
- Inertia Fuel Shutoff (IFS) switch on 3.5L vehicles.
- fuel tubes.
- fuel injectors.
- fuel rail.
- Fuel Tank Pressure (FTP) sensor (part of the fuel vapor tube assembly).

The vehicle

- has a single speed Mechanical Returnless Fuel System (MRFS) on 3.5L vehicles.
- has a 2-speed MRFS on 2.5L and 3.0L vehicles.
- has either a single container (L-shaped) ( FWD) or a dual container (saddle-type) ( AWD) fuel tank.
- has a 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.

- has an individual fuel level sensor, AWD vehicles only.
- has a fuel rail-mounted Schrader valve on early build 3.0L vehicles.
- has fuel, vapor and brake tubes in an integrated bundle assembly attached to the underside of the vehicle by retaining clips.
- has an Easy Fuel(TM) (capless) fuel tank filler pipe assembly, which cannot be modified in any way.
- has a supplemental refueling adapter located in the luggage compartment.
- has a FTP sensor (part of the fuel vapor tube assembly).
- is equipped with a sequential Multi-Port Fuel Injection (MFI) system.
- uses separately controlled fuel injectors for each cylinder. The fuel injectors are mounted to the intake manifold.
- fuel injectors are supplied with pressurized fuel from the FP module to the fuel rail.

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.