Fuel Tank and Lines - Overview
Diesel Engines
The diesel fuel system contains:
- 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.
- Fuel tubes.
- A serviceable primary fuel filter located on the rear of the frame side beside the side rails.
- A serviceable secondary fuel filter located on the engine.
- Three way quick release coupling.
- A serviceable fuel level sensor.
- Fuel tank filler pipe assembly.
- a Fuel Pump (FP) which provides pressurized fuel to the engine and has:
- Serviceable fuel sender.
- The check valve will maintain the fuel column to help restart. The pressure will bleed down through the HP (high pressure pump).
- Pressure relief valve for overpressure protection in the event of restricted flow.
- Fuel conditioning module that:
- Fuel filter and water separator to protect the fuel injectors.
- Fuel Filter/water separator is rail mounted
- a Fuel Pump Control Module.
The fuel tank stores the liquid fuel. The Fuel Pump located in the tank. The fuel supply tubes route fuel from the fuel tank to the engine and the fuel return tubes route unused fuel from the engine back to the fuel tank.
Fuel Pump Shut-off Feature
In the event of a moderate to severe collision, the vehicle is equipped with a Fuel Pump and Sender 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.