RAM 2500 2019, Руководство пользователя

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The DEF injection system consists of the
following components:

DEF tank

DEF pump

DEF injector

Electronically-heated DEF lines

DEF control module

NOx sensors

Temperature sensors

SCR catalyst

UQS Sensor
Refer to “Instrument Cluster Display” in
“Getting To Know Your Instrument Panel”
for system messages and warnings.
NOTE:

Your vehicle is equipped with a DEF injec -
tion system. You may occasionally hear an
audible clicking noise. This is normal
operation.

The DEF pump will run for a period of time
after engine shutdown to purge the DEF
system. This is normal operation.
Diesel Exhaust Fluid Storage
Diesel Exhaust Fluid (DEF) is considered a
very stable product with a long shelf life. If
DEF is kept in temperatures between 10°
and 90°F (-12° and 32°C), it will last a
minimum of one year.
DEF is subject to freezing at the lowest
temperatures. For example, DEF may freeze
at temperatures at or below 12° F (-11° C).
The system has been designed to operate in
this environment.
NOTE:
When working with DEF, it is important to
know that:

Any containers or parts that come into
contact with DEF must be DEF compatible
(plastic or stainless steel). Copper, brass,
aluminum, iron or non-stainless steel
should be avoided as they are subject to
corrosion by DEF.

If DEF is spilled, it should be wiped up
completely.
Adding Diesel Exhaust Fluid
The DEF gauge (located on the instrument
cluster) will display the level of DEF
remaining in the tank. Refer to “Instrument
Cluster” and “Instrument Cluster Descrip -
tions” in “Getting To Know Your Instrument
Panel” for further information.
NOTE:

Driving conditions (altitude, vehicle
speed, load, etc.) will effect the amount of
DEF that is used in your vehicle.

Another factor is that outside temperature
can affect DEF consumption. In cold
conditions, 12° F (-11° C) and below, the
DEF gauge needle can stay on a fixed posi
-
tion and may not move for extended
periods of time. This is a normal function
of the system.

There is an electric heater inside the DEF
tank that automatically works when neces
-
sary. And if the DEF supply does freeze,
the truck will operate normally until it
thaws.
DEF Fill Procedure
NOTE:
Refer to “Fluids And Lubricants” in “Tech -
nical Specifications” for the correct fluid
type.
2019_RAM_2500_3500_UG_USA=GUID-8BBFE451-BF24-4E82-808A-AE2460D39A05=1=en=.book Page 177