2020 Ram 3500 coolant

68GETTING TO KNOW YOUR VEHICLE
(Continued)
NOTE:
It is not necessary to move the temperature
settings for cold or hot vehicles. The system
automatically adjusts the temperature,
mode, and blower speed to provide comfort
as quickly as possible.
The temperature can be displayed in U.S. or
Metric units by selecting the U.S./Metric
customer-programmable feature. Refer to
the “Uconnect Settings” in “Multimedia” for
further information.
To provide you with maximum comfort in the
Automatic mode during cold start-ups, the
blower fan will remain on low until the engine
warms up. The blower will increase in speed
and transition into Auto mode.
Manual Operation Override
This system offers a full complement of manual
override features. The AUTO symbol in the front
ATC display will be turned off when the system
is being used in the manual mode.
OPERATING TIPS
NOTE:
Refer to the chart at the end of this section for
suggested control settings for various weather
conditions.
Summer Operation
The engine cooling system must be protected
with a high-quality antifreeze coolant to provide
proper corrosion protection and to protect
against engine overheating. OAT coolant
(conforming to MS.90032) is recommended.
Winter Operation
To ensure the best possible heater and
defroster performance, make sure the engine
cooling system is functioning properly and the
proper amount, type, and concentration of
coolant is used. Use of the Air Recirculation
mode during Winter months is not
recommended, because it may cause window
fogging.
Vacation/Storage
Before you store your vehicle, or keep it out of
service (i.e., vacation) for two weeks or more,
run the air conditioning system at idle for about
five minutes, in fresh air with the blower setting
on high. This will ensure adequate system
lubrication to minimize the possibility of
compressor damage when the system is started
again.
Window Fogging
Vehicle windows tend to fog on the inside in
mild, rainy, and/or humid weather. To clear the
windows, select Defrost or Mix mode and
increase the front blower speed. Do not use the
Recirculation mode without A/C for long
periods, as fogging may occur.
CAUTION!
Failure to follow these cautions can cause
damage to the heating elements:

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GETTING TO KNOW YOUR INSTRUMENT PANEL107
3. Instrument Cluster Display
When the appropriate conditions exist,
this display shows the instrument cluster
display messages. Refer to “Instrument
Cluster Display” in “Getting To Know Your
Instrument Panel” for further informa-
tion.
4. Oil Pressure Gauge
The pointer should always indicate the oil
pressure when the engine is running. A
continuous high or low reading under
normal driving conditions may indicate a
lubrication system malfunction. Imme -
diate service should be obtained from an
authorized dealer.
5. Speedometer
Indicates vehicle speed.
6. Fuel Gauge
The pointer shows the level of fuel in the
fuel tank when the ignition is in the ON/
RUN position.
 The fuel pump symbol points
to the side of the vehicle where
the fuel door is located.
Refer to “Refueling The Vehicle — Gas
Engine” in “Starting And Operating” for
further information.
7. Temperature Gauge
The gauge pointer shows engine coolant
temperature. The pointer positioned
within the normal range indicates that
the engine cooling system is operating
satisfactorily.
The gauge pointer will likely indicate a
higher temperature when driving in hot
weather, up mountain grades, or when
towing a trailer. It should not be allowed
to exceed the upper limits of the normal
operating range.
WARNING!
A hot engine cooling system is dangerous.
You or others could be badly burned by steam
or boiling coolant. You may want to call an
authorized dealer for service if your vehicle
overheats. If you decide to look under the
hood yourself, refer to the warnings under
“Cooling System Pressure Cap” in see
“Servicing And Maintenance” for further
information.
CAUTION!
Driving with a hot engine cooling system
could damage your vehicle. If the
temperature gauge reads “H,” pull over and
stop the vehicle. Idle the vehicle with the air
conditioner turned off until the pointer drops
back into the normal range. If the pointer
remains on the “H,” turn the engine off
immediately and call an authorized dealer for
service.
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GETTING TO KNOW YOUR INSTRUMENT PANEL109
 The fuel pump symbol points
to the side of the vehicle where
the fuel door is located.
Refer to “Refueling The Vehicle — Gas
Engine” in “Starting And Operating” for
further information.
5. Temperature Gauge
The gauge pointer shows engine coolant
temperature. The pointer positioned
within the normal range indicates that
the engine cooling system is operating
satisfactorily.
The gauge pointer will likely indicate a
higher temperature when driving in hot
weather, up mountain grades, or when
towing a trailer. It should not be allowed
to exceed the upper limits of the normal
operating range.
WARNING!
A hot engine cooling system is dangerous.
You or others could be badly burned by steam
or boiling coolant. You may want to call an
authorized dealer for service if your vehicle
overheats. If you decide to look under the
hood yourself, refer to the warnings under
“Cooling System Pressure Cap” in see
“Servicing And Maintenance” for further
information.
CAUTION!
Driving with a hot engine cooling system
could damage your vehicle. If the
temperature gauge reads “H,” pull over and
stop the vehicle. Idle the vehicle with the air
conditioner turned off until the pointer drops
back into the normal range. If the pointer
remains on the “H,” turn the engine off
immediately and call an authorized dealer for
service.
3

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110GETTING TO KNOW YOUR INSTRUMENT PANEL
BASE INSTRUMENT CLUSTER — DIESEL ENGINE
Base Instrument Cluster — Diesel Engine
BASE INSTRUMENT CLUSTER
D
ESCRIPTIONS — DIESEL ENGINE

1. Tachometer

Indicates the engine speed in revolutions
per minute (RPM x 1000). 2. Engine Coolant Temperature
This gauge shows the engine coolant
temperature. The gauge pointer will likely
show higher temperatures when driving
in hot weather, up mountain grades, or in
heavy stop and go traffic. If the red Warning Light turns on while driving,
safely bring the vehicle to a stop, and
turn off the engine. DO NOT operate the
vehicle until the cause is corrected.

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GETTING TO KNOW YOUR INSTRUMENT PANEL111
3. Instrument Cluster Display
When the appropriate conditions exist,
this display shows the instrument cluster
display messages. Refer to “Instrument
Cluster Display” in “Getting To Know Your
Instrument Panel” for further informa-
tion. 4. Oil Pressure Gauge
The pointer should always indicate some
oil pressure when the engine is running.
A continuous high or low reading under
normal driving conditions may indicate a
lubrication system malfunction. Imme
-
diate service should be obtained from an
authorized dealer.
5. Speedometer
Indicates vehicle speed.
6. Fuel Gauge
The pointer shows the level of fuel in the
fuel tank when the ignition switch is in
the ON/RUN position.
 The fuel pump symbol points
to the side of the vehicle where
the fuel filler door is located.
Refer to “Refueling The Vehicle — Gas
Engine” in “Starting And Operating” for
further information.
7. Diesel Exhaust Fluid (DEF) Gauge
The DEF Gauge displays the actual level
of Diesel Exhaust Fluid in the DEF tank.
Diesel Exhaust Fluid (DEF) is required to maintain normal vehicle operation and
emissions compliance. If something is
wrong with the gauge, a DEF Warning
Message or Malfunction Indicator Light
(MIL) will be displayed. More information
is available in the instrument cluster
display section under the heading of
Diesel Exhaust Fluid (DEF) Warning
Messages.
NOTE:
The gauge may take up to five seconds to
update after adding a gallon or more of
Diesel Exhaust Fluid (DEF) to the DEF tank. If
you have a fault related to the DEF system,
the gauge may not update to the new level.
See an authorized dealer for service.
The DEF gauge may also not immediately
update after a refill if the temperature of the
DEF fluid is below 39°F (4°C). The DEF tank
heater will warm up the DEF fluid and allow
the gauge to update after a period of run
time. Under very cold conditions, it is possible
that the gauge may not reflect the new fill
level for several drives.
WARNING!
A hot engine cooling system is dangerous.
You or others could be badly burned by steam
or boiling coolant. You may want to call an
authorized dealer for service if your vehicle
overheats.
CAUTION!
Driving with a hot engine cooling system
could damage your vehicle. If the
temperature gauge reads greater “H,” pull
over and stop the vehicle. Idle the vehicle
with the air conditioner turned off until the
pointer drops back into the normal range. If
the pointer remains on the “h,” turn the
engine off immediately and call an authorized
dealer for service.
3

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116GETTING TO KNOW YOUR INSTRUMENT PANEL
DISPLAY MENU ITEMS
Push and release the up or down arrow button
until the desired selectable menu icon is
highlighted in the instrument cluster display.
Refer to “Instrument Cluster Display” in this
chapter for further information.
Speedometer
Push and release the up or down arrow button
until the speedometer menu item is highlighted
in the instrument cluster display. Push and
release the right arrow button to cycle the
display between mph and km/h.
Vehicle Info
Push and release the up or down arrow button
until the Vehicle Info menu item is highlighted in
the instrument cluster display. Push and
release the right arrow button to enter the
submenus items of Vehicle Info. Follow the
directional prompts to access or reset any of the
following Vehicle Info submenu items:
Tire Pressure
Coolant Temperature
Transmission Temperature — If Equipped
Oil Temperature
Oil Pressure
Exhaust Brake — If Equipped
Turbo Boost — If Equipped
Oil Life
Fuel Filter Life — If Equipped
Battery Voltage
Gauge Summary
Engine Hours
Driver Assist — If Equipped
The Driver Assist menu displays the status of
the Adaptive Cruise Control (ACC) and
LaneSense systems.
Push and release the up or down arrow button
until the Driver Assist menu is displayed in the
instrument cluster display.
Adaptive Cruise Control (ACC) Feature
The instrument cluster display displays the
current ACC system settings. The information
displayed depends on ACC system status. Push the Adaptive Cruise Control (ACC) on/off
button (located on the steering wheel) until one
of the following displays in the instrument
cluster display:
Adaptive Cruise Control Off
When ACC is deactivated, the display will read
“Adaptive Cruise Control Off.”
Adaptive Cruise Control Ready
When ACC is activated but the vehicle speed
setting has not been selected, the display will
read “Adaptive Cruise Control Ready.”
Push the SET + or the SET- button (located on
the steering wheel) and the following will display
in the instrument cluster display:
ACC SET
When ACC is set, the set speed will display in
the instrument cluster.
The ACC screen may display once again if any
ACC activity occurs, which may include any of
the following:
Distance Setting Change
System Cancel
Driver Override

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118GETTING TO KNOW YOUR INSTRUMENT PANEL
Stored Messages
Push and release the up or down arrow button
until the Messages Menu item is highlighted.
This feature shows the number of stored
warning messages. Push and release the right
or left arrow buttons to cycle through stored
messages.
Screen Setup Menu Item
Push and release the up or down arrow button
until the Screen Setup menu item is highlighted
in the instrument cluster display. Push and
release the right arrow button to enter the
Screen Setup submenu. The Screen Setup
feature allows you to change what information
is displayed in the instrument cluster as well as
the location that information is displayed.
Current Gear — If Equipped
Off (Default Setting)
On
Odometer
Unit Without Decimal (Default Setting)
Unit With Decimal Favorite Menu
Speedometer
Vehicle Info
Driver Assist (Show/Hide) — If Equipped
Fuel Economy (Show/Hide)
Trip Info (Show/Hide)
Trailer Tow (Show/Hide) — If Equipped
Audio (Show/Hide)
Messages
Screen Setup
Commercial Settings — If Equipped
NOTE:
Menus with (Show/Hide) can push the Right
arrow button to choose whether to show or hide
this menu in the instrument cluster display.
Upper Left
None
Compass (Default Setting) — If Equipped
Outside Temp — If Equipped
Time
Range To Empty
Average MPG
Current MPG
Trip A Distance
Trip B Distance
Trailer Trip — If Equipped
Trailer Brake — If Equipped
Oil Pressure — If Equipped
Coolant Temperature — If Equipped
Oil Temperature — If Equipped
Battery Voltage — If Equipped
Transmission Temperature — If Equipped
Oil Life — If Equipped
Exhaust Brake — If Equipped
Turbo Boost — If Equipped
Fuel Filter Life — If Equipped

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GETTING TO KNOW YOUR INSTRUMENT PANEL119
Center
None
Compass
Outside Temp
Time
Range To Empty
Average MPG
Current MPG
Trip A Distance
Trip B Distance
Trailer Trip — If Equipped
Audio
Speedometer (Default Setting)
Menu Title
Upper Right
None
Compass — If Equipped
Outside Temp (Default Setting) — If Equipped
Time
Range To Empty
Average MPG
Current MPG
Trip A Distance
Trip B Distance
Trailer Trip — If Equipped
Trailer Brake — If Equipped
Oil Pressure — If Equipped
Coolant Temperature — If Equipped
Oil Temperature — If Equipped
Battery Voltage — If Equipped
Transmission Temperature — If Equipped
Oil Life — If Equipped
Exhaust Brake — If Equipped
Turbo Boost — If Equipped
Fuel Filter Life — If Equipped Left Side — If Equipped
None
Range
Average MPG
Menu Icon (Default Setting)
Coolant Temperature
Oil Temperature
Transmission Temperature
Oil Life
Fuel Filter Life — If Equipped
Right Side — If Equipped
None
Range (Default Setting)
Average MPG
Menu Icon
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