2020 Ram 3500 engine overheat

8
BULB REPLACEMENT ....................................... 351 Replacement Bulbs ..................................351Replacing Exterior Bulbs ...........................353
FUSES .................................................................. 358
Power Distribution Center .........................358
JACKING AND TIRE CHANGING ...................... 365
Jack Location .............................................365Removal Of Jack And Tools .......................365
Removing The Spare Tire ..........................367
Preparations For Jacking...........................368
Jacking Instructions ...................................368
To Stow The Flat Or Spare ........................ 372Reinstalling The Jack And Tools ...............373
Hub Caps/Wheel Covers — If Equipped ...374
JUMP STARTING ................................................ 375
Preparations For Jump Start .....................375Jump Starting Procedure...........................376
GEAR SELECTOR OVERRIDE — 6–SPEED
TRANSMISSION ................................................ 377
MANUAL PARK RELEASE — 8 – SPEED
TRANSMISSION ................................................ 378
IF YOUR ENGINE OVERHEATS ......................... 379
FREEING A STUCK VEHICLE ............................ 380 TOWING A DISABLED VEHICLE .......................381
Two-Wheel Drive Models ........................... 382
Four-Wheel Drive Models .......................... 383Emergency Tow Hooks — If Equipped ...... 384
ENHANCED ACCIDENT RESPONSE
SYSTEM (EARS) ................................................. 384
EVENT DATA RECORDER (EDR) .......................384
SERVICING AND MAINTENANCE
SCHEDULED SERVICING — GAS ENGINE .......385
Maintenance Plan — Gasoline Engine...... 386
Heavy Duty Use Of The Vehicle................. 389
SCHEDULED SERVICING— DIESEL ENGINE .... 389
Oil Change Indicator System —
Cummins Diesel......................................... 390 Perform Service Indicator —
Cummins Diesel ........................................ 390 Maintenance Plan — Cummins Diesel
Engine ........................................................ 391
ENGINE COMPARTMENT .................................. 396
6.4L Engine ................................................ 396
6.7L Diesel Engine — Six-Speed 68RFE ... 397
6.7L Diesel Engine — Six-Speed AISIN
(AS69RC HD) .............................................. 398 Checking Oil Level — Gas Engine ............. 399
Checking Oil Level — Diesel Engine .......... 399
Adding Washer Fluid ................................. 399Maintenance-Free Battery ....................... 400Pressure Washing...................................... 400
DEALER SERVICE .............................................. 401
Engine Oil .................................................. 401
Engine Oil Filter ......................................... 403Engine Air Cleaner Filter ........................... 403
Air Conditioner Maintenance ................... 405
Accessory Drive Belt Inspection ............... 408Draining Fuel/Water Separator Filter —
Diesel Engine ............................................ 409 Engine Mounted Fuel Filter
Replacement — Diesel Engine .................. 410 Underbody Mounted Fuel Filter
Replacement — Diesel Engine .................. 412 Priming If The Engine Has Run Out Of
Fuel — Diesel Engine ................................. 412 Intervention Regeneration Strategy —
Message Process Flow ............................. 413 Diesel Exhaust Fluid .................................. 414
Body Lubrication ........................................ 414

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GETTING TO KNOW YOUR VEHICLE37
HEATED SEATS — IF EQUIPPED
On some models, the front and rear seats may
be equipped with heaters located in the seat
cushions and seat backs.
Front Heated Seats
The heated seats control buttons are located on
the center instrument panel below the
touchscreen, and are also located within the
climate or controls screen of the touchscreen.
NOTE:
If the vehicle is equipped with a 12-inch radio,
there will only be control buttons through the
touchscreen.
Push the heated seat buttononce to turn the
HI setting on.
Push the heated seat button a second time to
turn the MED setting on.
Push the heated seat button a third time to
turn the LO setting on.
Push the heated seat buttona fourth time to
turn the heating elements off.
NOTE:
The engine must be running for the heated
seats to operate.
The level of heat selected will stay on until
the operator changes it. Vehicles Equipped With Remote Start
On models that are equipped with remote start,
the driver’s seat can be programmed to come
on during a remote start.
This feature can be programmed through the
Uconnect system. Refer to “Uconnect Settings”
in “Multimedia” for further information.
Rear Heated Seats
On some models, the two outboard rear seats
are equipped with heated seats. The heated
seat switches for these seats are located on the
rear of the center console.

Rear Heated Seat Switches

WARNING!
Persons who are unable to feel pain to the
skin because of advanced age, chronic
illness, diabetes, spinal cord injury, medica -
tion, alcohol use, exhaustion or other phys -
ical condition must exercise care when
using the seat heater. It may cause burns
even at low temperatures, especially if
used for long periods of time.
Do not place anything on the seat or seat -
back that insulates against heat, such as a
blanket or cushion. This may cause the seat
heater to overheat. Sitting in a seat that has
been overheated could cause serious
burns due to the increased surface
temperature of the seat.
2

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GETTING TO KNOW YOUR VEHICLE41
STEERING WHEEL
TILT STEERING COLUMN
This feature allows you to tilt the steering
column upward or downward. The tilt lever is
located on the steering column, below the
multifunction lever.
Pull the lever toward the steering wheel to
unlock the steering column. With one hand
firmly on the steering wheel, move the steering
column up or down, as desired. Release the
lever to lock the steering column firmly in place.

Tilt Steering Lever

HEATED STEERING WHEEL — IF
E
QUIPPED
The steering wheel contains a heating element
that helps warm your hands in cold weather.
The heated steering wheel has only one
temperature setting. Once the heated steering
wheel has been turned on, it will stay on until
the operator turns it off. The heated steering
wheel may not turn on when it is already warm.
The heated steering wheel control button is
located on the center instrument panel below
the touchscreen, as well as within the climate or
controls screen of the touchscreen.
Press the heated steering wheel button once
to turn the heating element on.
Press the heated steering wheel button a
second time to turn the heating element off. NOTE:
The engine must be running for the heated
steering wheel to operate.
Vehicles Equipped With Remote Start
On models that are equipped with remote start,
the heated steering wheel can be programmed
to come on during a remote start.
This feature can be programmed through the
Uconnect system. Refer to “Uconnect Settings”
in “Multimedia” for further information.
WARNING!
Do not adjust the steering column while
driving. Adjusting the steering column while
driving or driving with the steering column
unlocked, could cause the driver to lose
control of the vehicle. Failure to follow this
warning may result in serious injury or death.
WARNING!
Persons who are unable to feel pain to the
skin because of advanced age, chronic
illness, diabetes, spinal cord injury, medica
-
tion, alcohol use, exhaustion, or other phys -
ical conditions must exercise care when
using the steering wheel heater. It may
cause burns even at low temperatures,
especially if used for long periods.
Do not place anything on the steering wheel
that insulates against heat, such as a
blanket or steering wheel covers of any type
and material. This may cause the steering
wheel heater to overheat.
2

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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:

20_DJD2_OM_EN_USC_t.book Page 68

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.
3

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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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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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132GETTING TO KNOW YOUR INSTRUMENT PANEL
Hood Open Warning Light
This warning light will illuminate when
the hood is ajar/open and not fully
closed.
NOTE:
If the vehicle is moving, there will also be a
single chime.
Vehicle Security Warning Light — If
Equipped
This light will flash at a fast rate for
approximately 15 seconds when the
vehicle security alarm is arming, and
then will flash slowly until the vehicle
is disarmed.
Engine Coolant Temperature Warning
Light
This warning light warns of an
overheated engine condition. If the
engine coolant temperature is too
high, this indicator will illuminate and
a single chime will sound. If the temperature
reaches the upper limit, a continuous chime will
sound for four minutes or until the engine is
able to cool; whichever comes first. If the light turns on while driving, safely pull over
and stop the vehicle. If the Air Conditioning
(A/C) system is on, turn it off. Also, shift the
transmission into NEUTRAL and idle the vehicle.
If the temperature reading does not return to
normal, turn the engine off immediately and call
for service.
Refer to “If Your Engine Overheats” in “In Case
Of Emergency” for further information.
Battery Charge Warning Light
This warning light will illuminate when
the battery is not charging properly. If
it stays on while the engine is running,
there may be a malfunction with the
charging system. Contact an authorized dealer
as soon as possible.
This indicates a possible problem with the
electrical system or a related component.
Oil Pressure Warning Light
This warning light will illuminate to
indicate low engine oil pressure. If the
light turns on while driving, stop the
vehicle, shut off the engine as soon as
possible, and contact an authorized dealer. A
chime will sound when this light turns on. Do not operate the vehicle until the cause is
corrected. This light does not indicate how
much oil is in the engine. The engine oil level
must be checked under the hood.
Oil Temperature Warning Light
This warning light will illuminate to
indicate the engine oil temperature is
high. If the light turns on while driving,
stop the vehicle and shut off the
engine as soon as possible. Wait for oil
temperature to return to normal levels.
Electronic Throttle Control (ETC) Warning
Light
This warning light will illuminate to
indicate a problem with the Electronic
Throttle Control (ETC) system. If a
problem is detected while the vehicle
is running, the light will either stay on or flash
depending on the nature of the problem. Cycle
the ignition when the vehicle is safely and
completely stopped and the transmission is
placed in the PARK (P) position. The light should
turn off. If the light remains on with the vehicle
running, your vehicle will usually be drivable;
however, see an authorized dealer for service
as soon as possible.

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