4. When the nozzle “clicks” or shuts off, the fuel tank
is full. Wait five seconds before removing the fuel
nozzle to allow excess fuel to drain from nozzle.
5. Remove the diesel nozzle, reinstall fuel cap and
close the fuel filler door.
NOTE:
•
When the fuel nozzle “clicks” or shuts off, the fuel
tank is full.
•
Tighten the fuel filler cap about a quarter turn until
you hear one click. This is an indication that the cap
is properly tightened.
•
If the fuel filler cap is not tightened properly, the MIL
will come on. Be sure the cap is tightened every
time the vehicle is refueled.
AVOID USING CONTAMINATED FUEL
Fuel that is contaminated by water or dirt can cause
severe damage to the engine fuel system. Proper main-
tenance of the engine fuel filter and fuel tank is essen-
tial see
page 312.
BULK FUEL STORAGE — DIESEL
FUEL
If you store quantities of fuel, good maintenance of the
stored fuel is also essential. Fuel contaminated with
water will promote the growth of “microbes.” These
microbes form “slime” that will clog the fuel filtration
system and lines. Drain condensation from the supply
tank and change the line filter on a regular basis.
NOTE:
When a diesel engine is allowed to run out of fuel, air is
pulled into the fuel system.
If the vehicle will not start see
page 314.
WARNING!
Do not open the high pressure fuel system with the
engine running. Engine operation causes high fuel
pressure. High pressure fuel spray can cause serious
injury or death.
DIESEL EXHAUST FLUID
Your vehicle is equipped with a Selective Catalytic
Reduction (SCR) system to meet the very stringent die-
sel emissions standards required by the Environmental
Protection Agency.
The purpose of the SCR system is to reduce levels of
NOx (oxides of nitrogen emitted from engines) that are
harmful to our health and the environment to a near-
zero level. A small quantity of Diesel Exhaust Fluid
(DEF) is injected into the exhaust upstream of a catalyst
where, when vaporized, it converts smog-forming nitro-
gen oxides (NOx) into harmless nitrogen (N2) and water
vapor (H2O), two natural components of the air we
breathe. You can operate with the comfort that your
vehicle is contributing to a cleaner, healthier world envi-
ronment for this and generations to come.
System Overview
This vehicle is equipped with a Diesel Exhaust Fluid
(DEF) injection system and a Selective Catalytic Reduc-
tion (SCR) catalyst to meet the emission requirements.
The DEF injection system consists of the following
components:
•
DEF tank
•
DEF pump
•
DEF injector
•
Electronically-heated DEF Lines
•
NOx sensors
•
Temperature sensors
•
SCR catalyst
The DEF injection system and SCR catalyst enable the
achievement of diesel emissions requirements; while
maintaining outstanding fuel economy, drivability,
torque and power ratings.
For system messages and warnings see
page 99.
NOTE:
•
Your vehicle is equipped with a DEF injection sys-
tem. You may occasionally hear an audible clicking
noise from under the vehicle at a stop. This is nor-
mal operation.
•
The DEF pump will run for a period of time after
engine shutdown to purge the DEF system. This is
normal operation and may be audible from the rear
of the vehicle.
STARTING AND OPERATING 163
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