2021 RAM CHASSIS CAB engine coolant

11
SYMBOL GLOSSARY
Some car components have colored labels with symbols indicating
precautions to be observed when using this component. It is important
to follow all warnings when operating your vehicle. See below for the
definition of each symbol Úpage 107.
Red Warning Lights
Seat Belt Reminder Warning Light
Úpage 107
Air Bag Warning Light Úpage 107
Brake Warning Light Úpage 107
Hood Open Warning Light Úpage 108
Vehicle Security Warning Light — If Equipped Úpage 108
Engine Coolant Temperature Warning Light Úpage 108
Battery Charge Warning Light
Úpage 108
Oil Pressure Warning Light Úpage 108
Oil Temperature Warning Light Úpage 109
Electronic Throttle Control (ETC) Warning Light Úpage 109

Electric Power Steering (EPS) Fault Warning Light
Úpage 109
Trailer Brake Disconnected Warning Light Úpage 109
Transmission Temperature Warning Light — If Equipped
Ú page 109
Door Open Warning Light Úpage 110
Red Warning Lights
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12
Yellow Warning Lights
Adaptive Cruise Control (ACC) Fault Warning Light — If Equipped
Úpage 110
Engine Check/Malfunction Indicator Warning Light (MIL)
Ú page 110
Electronic Stability Control (ESC) Active Warning Light — If Equipped
Úpage 111
Electronic Stability Control (ESC) OFF Warning Light — If Equipped
Úpage 111
Low Washer Fluid Warning Light — If Equipped Úpage 111
Low Fuel Warning Light Úpage 111
Low Coolant Level Warning Light Úpage 111Loose Fuel Filler Cap Warning Light — If
Equipped
Ú page 111
Tire Pressure Monitoring System (TPMS) Warning Light — If Equipped
Úpage 111
Anti-Lock Brake System (ABS) Warning Light Úpage 113
Service Forward Collision Warning (FCW) Light — If Equipped
Úpage 113
Service 4WD Warning Light — If Equipped Úpage 113
Cruise Control Fault Warning Light Úpage 113
Yellow Warning Lights

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GETTING TO KNOW YOUR VEHICLE65
CLIMATE VOICE RECOGNITION
Adjust vehicle temperatures hands-free and
keep everyone comfortable while you keep
moving ahead.
Push the VR button on the steering wheel. After
the beep, say one of the following commands:
“Set driver temperature to 70 degrees ”
“Set passenger temperature to 70 degrees ”

Did you know: Voice Command for Climate may only
be used to adjust the interior temperature of your
vehicle. Voice Command will not work to adjust the
heated seats or steering wheel if equipped.

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

For information on maintaining the Climate
Control system when the vehicle is being stored
for an extended period of time, see
Ú
page 427.

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.

Outside Air Intake
Make sure the air intake, located directly in
front of the windshield, is free of obstructions,
such as leaves. Leaves collected in the air
intake may reduce airflow, and if they enter
the plenum, they could plug the water drains. In Winter months, make sure the air intake is
clear of ice, slush, and snow.
Cabin Air Filter
The climate control system filters out dust and
pollen from the air. Contact an authorized
dealer to service your cabin air filter, and to
have it replaced when needed.
Operating Tips Chart
WEATHER CONTROL SETTINGS
Hot Weather And
Vehicle Interior Is Very Hot Set the mode control
to , on, and blower on high. Roll down the
windows for a minute to flush out the hot air.
Adjust the controls as needed to achieve comfort.
Warm Weather Turn on and set the
mode control to the position.
Cool Sunny Operate in position.
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82GETTING TO KNOW YOUR INSTRUMENT PANEL
6. 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. 7. 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.
WARNING!

A hot engine cooling system is dangerous.
You or others could be badly burned by steam
or boiling coolant. It is recommended to call an
authorized dealer for service if your vehicle
overheats. If you decide to look under the hood
yourself, Follow the warnings under the Cooling
System Pressure Cap paragraph
Ú
page 383.

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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84GETTING TO KNOW YOUR INSTRUMENT PANEL
PREMIUM INSTRUMENT CLUSTER
D
ESCRIPTIONS

1. Tachometer

Indicates the engine speed in revolutions
per minute (RPM x 1000).
2. Instrument Cluster Display
When the appropriate conditions exist,
this display shows the instrument cluster
display messages Ú page 90.

Premium Instrument Cluster Display

The display always shows one of the main
menu item after ignition on. 3. Speedometer
Indicates vehicle speed.
4. 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. 5. 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.
1 – Instrument Cluster Display Controls
2 – Instrument Cluster Display Screen
WARNING!

A hot engine cooling system is dangerous. You or
others could be badly burned by steam or boiling
coolant. It is recommended to call an authorized
dealer for service if your vehicle overheats. If you
decide to look under the hood yourself, Follow the
warnings under the Cooling System Pressure Cap
paragraph
Ú
page 383.

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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86GETTING TO KNOW YOUR INSTRUMENT PANEL
DIESEL INSTRUMENT CLUSTER

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. 3. Instrument Cluster Display
When the appropriate conditions exist,
this display shows the instrument cluster
display messages Ú
page 90.

Base Instrument Cluster Display

The display always shows one of the main
menu item after ignition on.
WARNING!
A hot engine cooling system is dangerous.
You or others could be badly burned by steam
or boiling coolant. It is recommended 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.

1 – Instrument Cluster Display Controls
2 – Instrument Cluster Display Screen

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92GETTING TO KNOW YOUR INSTRUMENT PANEL
4. Push and hold the right arrow button to
select “Reset”.
5. Push and release the down arrow button
to select “Yes,” then push and release the
right arrow button to reset the Oil Life to
100%.
6. Push and release the up arrow button to
exit the instrument cluster display screen.
Secondary Method Of Resetting Engine Oil Life

1. Without pressing the brake pedal, push the ENGINE START/STOP button and place the
ignition to the ON/RUN position (do not
start the engine).

2. Fully press the accelerator pedal, slowly, three times within ten seconds.
3. Without pushing the brake pedal, push the ENGINE START/STOP button once to return
the ignition to the OFF/LOCK position.
NOTE:
If the indicator message illuminates when
you start the vehicle, the oil change indicator
system did not reset. If necessary, repeat this
procedure.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.
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
Boost Pressure — If Equipped
Diesel Particulate Filter (DPF) — If Equipped
Oil Life
Fuel Filter Life — If Equipped
Battery Voltage
Gauge Summary
Engine Hours
Off-Road
Push and release the up or down arrow
button until the Off-Road menu icon is displayed
in the instrument cluster display. Push and
release the left or right arrow button to
scroll through the information submenus.
Drivetrain
Front Wheel Angle: displays the graphical
and numerical value of calculated
average front wheel angle from the
steering wheel orientation.

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GETTING TO KNOW YOUR INSTRUMENT PANEL103
Exhaust Filter Full — Power Reduced See
Dealer — This message indicates the PCM
has derated the engine to limit the likelihood
of permanent damage to the after-treatment
system. If this condition is not corrected and
a dealer service is not performed, extensive
exhaust after-treatment damage can occur.
To correct this condition it will be necessary
to have your vehicle serviced by an autho-
rized dealer.
NOTE:
Failing to follow the oil change indicator,
changing your oil and resetting the oil change
indicator by 0 miles remaining will prevent
the diesel exhaust filter from performing it's
cleaning routine. This will shortly result in a
Malfunction Indicator Light (MIL) and reduced
engine power. Only an authorized dealer will be
able to correct this condition.Cold Ambient Derate Mode Messages
The vehicle will display messages when a
derate (engine power reduction) is activated
to protect the engine during start up in cold
ambient temperatures.
Engine Power Reduced During Warm up —
This message will display during start up
when the ambient temperature is between
10°F (-12°C) and -10°F (-23°C).
Engine Power Reduced Up To 30 Sec
(Seconds) During Warm up — This message
will display during start up when the ambient
temperature is between -10°F (-23°C) and
-25°F (-32°C).
Engine Power Reduced Up To 2 Min
(Minutes) During Warm up — This message
will display during start up when the ambient
temperature is -25°F (-32°C) and below.
Your vehicle is equipped with an engine
warm up protection feature that may limit
engine performance after cold starting at low
ambient temperatures. The length of time
engine speed is limited is dependent upon
engine coolant temperature. Engine speed
may be briefly limited to 1,000 RPM after
starting with coolant temperature below freezing conditions, and may be limited to
1,000 RPM for up to approximately two
minutes under more severe cold conditions.
Coolant Low
— This telltale will turn on to indi -
cate the vehicle coolant level is low. Refer to
“Dealer Service” in “Servicing And Mainte -
nance” for more information.
Diesel Exhaust Fluid (DEF) Warning
Messages
There are four different messages which are
displayed if the vehicle detects that the DEF
system has been filled with a fluid other than
DEF, has experienced component failures, or
when tampering has been detected. The vehicle
may be limited to a maximum speed of 5 mph
(8 km/h) if the DEF system is not serviced
within less than 200 miles (322 km) of the fault
being detected.
When the DEF system needs to be serviced the
following warnings will display:

DEF Low Refill Soon — This message will
display when the low level is reached, during
vehicle start up, and with increased frequency
during vehicle operation. It will be accompa -
nied by a single chime. Approximately
5 gallons (19 Liters) of DEF is required to

CAUTION!
See an authorized dealer, as damage to
the exhaust system could occur soon with
continued operation.
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