engine overheat RAM CHASSIS CAB 2023 Owners Manual

7
SAFETY TIPS ........................................................ 321 Transporting Passengers .............................. 321Transporting Pets ......................................... 322
Connected Vehicles....................................... 322
Safety Checks You Should Make Inside The
Vehicle ........................................................... 322Periodic Safety Checks You Should Make
Outside The Vehicle ...................................... 323Exhaust Gas ................................................... 324Carbon Monoxide Warnings ......................... 324
IN CASE OF EMERGENCY
HAZARD WARNING FLASHERS ........................ 325
ASSIST AND SOS SYSTEM — IF EQUIPPED ...... 326
JACKING AND TIRE CHANGING.......................... 329 4500/5500 Models ...................................... 329Preparations For Jacking .............................. 329Jacking Instructions 4500 And
5500 Series ................................................... 330To Stow The Flat Or Spare — If Equipped ... 332
Hub Caps/Wheel Covers —If Equipped ........ 332
JUMP STARTING .................................................. 333
Preparations For Jump Start......................... 333Jump Starting Procedure .............................. 334
IF YOUR ENGINE OVERHEATS ........................... 335
GEAR SELECTOR OVERRIDE .............................. 336 6–Speed Transmission — If Equipped ........ 336 MANUAL PARK RELEASE ................................... 337
8–Speed Transmission — If Equipped ......... 337
FREEING A STUCK VEHICLE .............................. 338
TOWING A DISABLED VEHICLE ......................... 339
Two-Wheel Drive Models .............................. 340Four-Wheel Drive Models ............................. 340
Emergency Tow Hooks — If Equipped .......... 341
ENHANCED ACCIDENT RESPONSE SYSTEM
(EARS) .................................................................. 341
EVENT DATA RECORDER (EDR) ........................ 341
SERVICING AND MAINTENANCE
SCHEDULED SERVICING ................................... 342
Maintenance Plan — Gasoline Engine ......... 344Maintenance Plan — Diesel Engine ............ 346
ENGINE COMPARTMENT .................................... 350
6.4L Gasoline Engine ................................... 3506.7L Diesel Engine ........................................ 351Checking Oil Level ......................................... 352
Adding Washer Fluid .................................... 352
Maintenance-Free Battery ............................ 352
Pressure Washing ......................................... 353 VEHICLE MAINTENANCE .................................... 353
Engine Oil ...................................................... 353
Engine Oil Filter ............................................. 354Engine Air Cleaner Filter .............................. 355
Air Conditioner Maintenance ....................... 357
Accessory Drive Belt Inspection ................... 359Draining Fuel/Water Separator Filter .......... 360
Engine Mounted Fuel Filter Replacement ... 361Underbody Mounted Fuel Filter
Replacement ................................................. 362

Priming If The Engine Has Run Out Of Fuel ...363

Intervention Regeneration Strategy —
Message Process Flow ................................ 364Diesel Exhaust Fluid (DEF) ........................... 364
Body Lubrication ........................................... 364
Windshield Wiper Blades.............................. 365
Exhaust System ............................................ 367
Cooling System ............................................. 368Charge Air Cooler — Inter-Cooler ................. 370
Brake System ............................................... 371Automatic Transmission ............................... 372
Rear Axle And 4x4 Front Driving Axle
Fluid Level ..................................................... 374
Transfer Case ............................................... 374Noise Control System Required
Maintenance & Warranty ............................ 374
Fuses.............................................................. 377
Bulb Replacement ........................................ 384

23_DPF_OM_EN_USC_t.book Page 7

28GETTING TO KNOW YOUR VEHICLE
HEATED STEERING WHEEL —
I
F EQUIPPED
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 button is located on the
center of the instrument panel below the radio
screen, or within the climate or comfort screen of
the touchscreen.
NOTE:If the vehicle is equipped with a 12-inch radio,
there will only be control buttons through 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.
For information on use with the Remote Start
system, see Ú page 21.
UCONNECT VOICE RECOGNITION —
IF EQUIPPED
INTRODUCING VOICE RECOGNITION
Start using Uconnect Voice Recognition with these
helpful quick tips. It provides the key Voice
Commands and tips you need to know to control
your vehicle’s Voice Recognition (VR) system.

Uconnect 3 With 5-inch Display

If you see the NAV icon on the bottom bar or in the
Apps menus of your 8.4-inch touchscreen, you
have the Uconnect 5 NAV system. If not, you have
a Uconnect 5 with 8.4-inch display system.
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, medication,
alcohol use, exhaustion, or other physical
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 or mate -
rial. This may cause the steering wheel heater
to overheat.

23_DPF_OM_EN_USC_t.book Page 28

GETTING TO KNOW YOUR VEHICLE49
PROGRAMMING HOMELINK® TO A
M
ISCELLANEOUS DEVICE
The procedure on how to program HomeLink® to a
miscellaneous device follows the same procedure
as programming to a garage door opener
Ú page 48. Be sure to determine if the device has
a rolling code, or non-rolling code before beginning
the programming process.
NOTE:Canadian Radio Frequency (RF) laws require trans -
mitter signals to time-out (or quit) after several
seconds of transmission, which may not be long
enough for HomeLink® to pick up the signal during
programming. Similar to this Canadian law, some
U.S. gate operators are designed to time-out in the
same manner. The procedure may need to be
performed multiple times to successfully pair the
device to your HomeLink® buttons.
REPROGRAMMING A SINGLE
H
OMELINK® BUTTON
To reprogram a single HomeLink® button that has
been previously trained, without erasing all the
channels, proceed as follows. Be sure to
determine whether the new device you want to
program the HomeLink® button to has a rolling
code, or non-rolling code.
1. Place the ignition in the ON/RUN position,
without starting the engine.

2. Push and hold the desired HomeLink® button until the HomeLink® indicator light begins to
flash after 20 seconds. Do not release the
button.
3. Without releasing the button , proceed with
Step 2 in “Programming HomeLink® To A
Garage Door Opener” and follow all remaining
steps.
CANADIAN/GATE OPERATOR
P
ROGRAMMING
For programming transmitters in Canada/United
States that require the transmitter signals to
“time-out” after several seconds of transmission:
Canadian Radio Frequency (RF) laws require
transmitter signals to time-out (or quit) after
several seconds of transmission, which may not be
long enough for HomeLink® to pick up the signal
during programming. Similar to this Canadian law,
some U.S. gate operators are designed to time-out
in the same manner.
It may be helpful to unplug the device during the
cycling process to prevent possible overheating of
the garage door or gate motor.
1. Place the ignition in the ON/RUN position.

NOTE:For vehicles equipped with Keyless Enter ‘n Go™,
place the ignition in the RUN position. Make sure
while programming HomeLink® with the engine on
that your vehicle is outside of your garage, or that
the garage door remains open at all times.
2. Place the hand-held transmitter 1 to 3 inches
(3 to 8 cm) away from the HomeLink® button
you wish to program while keeping the
HomeLink® indicator light in view.
3. Continue to push and hold the HomeLink® button while you push and release (cycle) your
hand-held transmitter every two seconds until
HomeLink® has successfully accepted the
frequency signal. The indicator light will flash
slowly and then rapidly when fully trained.
4. Watch for the HomeLink® indicator to change flash rates. When it changes, it is
programmed. It may take up to 30 seconds or
longer in rare cases. The garage door may
open and close while you are programming.
5. Push and hold the programmed HomeLink® button and observe the indicator light.
2

23_DPF_OM_EN_USC_t.book Page 49

64GETTING TO KNOW YOUR VEHICLE
Mix Mode
Air is directed through the floor, defrost,
and side window demister outlets. This
setting works best in cold or snowy
conditions that require extra heat to the
windshield. This setting is good for maintaining
comfort while reducing moisture on the
windshield.
AUTOMATIC TEMPERATURE CONTROL
(ATC)
Automatic Operation

1. Push the AUTO button on the faceplate, or the
AUTO button on the touchscreen on the
Automatic Temperature Control (ATC) Panel.

2. Next, adjust the temperature you would like the system to maintain by adjusting the driver
and passenger temperature control buttons.
Once the desired temperature is displayed, the
system will achieve and automatically
maintain that comfort level.
3. When the system is set up for your comfort level, it is not necessary to change the
settings. You will experience the greatest
efficiency by simply allowing the system to
function automatically.
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 within
Uconnect Settings Ú page 199.
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.
CLIMATE VOICE RECOGNITION —
I
F EQUIPPED
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
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.

23_DPF_OM_EN_USC_t.book Page 64

GETTING TO KNOW YOUR INSTRUMENT PANEL79
Use this QR code to access your
digital experience.
MIDLINE INSTRUMENT
C
LUSTER DESCRIPTIONS

1. Tachometer

Indicates the engine speed
in revolutions per minute (RPM x 1000).
2. Voltmeter
When the vehicle is in the RUN state, the
gauge indicates the electrical system
voltage. The pointer should stay within the
normal range if the battery is charged. If the
pointer moves to either extreme left or right
and remains there during normal driving,
the electrical system should be serviced.
3. Instrument Cluster Display
When the appropriate conditions exist, this
display shows the instrument cluster
display messages Ú page 89.
The display always shows one of the main
menu item after the ignition is placed on.
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. Immediate
service should be obtained from an autho
-
rized dealer.
5. Speedometer
Indicates vehicle speed.
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 oper -
ating 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.
NOTE:The Instrument Cluster Warning Indicators will illu -
minate briefly for a bulb check when the ignition is
first cycled.
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 368.
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

23_DPF_OM_EN_USC_t.book Page 79

GETTING TO KNOW YOUR INSTRUMENT PANEL81
HIGHLINE 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 89.
The display always shows one of the main
menu item after the ignition is placed 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 oper -
ating 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.
NOTE:The Instrument Cluster Warning Indicators will illu -
minate briefly for a bulb check when the ignition is
first cycled.
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 368.
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

23_DPF_OM_EN_USC_t.book Page 81

GETTING TO KNOW YOUR INSTRUMENT PANEL83
PREMIUM INSTRUMENT CLUSTER
D
ESCRIPTIONS — GASOLINE

1. Temperature Gauge

The temperature gauge shows engine
coolant temperature. Any reading within
203°F - 230°F (95°C - 110°C) indicates
that the engine cooling system is operating
satisfactorily.
The 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. 2. Speedometer
Indicates vehicle speed.
3. Fuel Gauge
The pointer shows the level of fuel in the
fuel tank when the Keyless Push Button
Ignition is in the ON/RUN position.
 The fuel pump symbol points to
the side of the vehicle where the
fuel door is located.
4. Tachometer
Indicates the engine speed in revolutions
per minute (RPM x 1000).
5. Instrument Cluster Display
The instrument cluster display features a
driver interactive display Ú page 89.
NOTE:The hard telltales will illuminate for a bulb check
when the ignition is first cycled.
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 Úpage 368.
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

23_DPF_OM_EN_USC_t.book Page 83

GETTING TO KNOW YOUR INSTRUMENT PANEL85
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 tempera -
ture. 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 89.
The display always shows one of the main
menu item after the ignition is placed on.
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. Immediate
service should be obtained from an autho -
rized dealer.
5. Speedometer
Indicates vehicle speed.
6. Diesel Exhaust Fluid (DEF) Gauge
The DEF Gauge displays the actual level of
Diesel Exhaust Fluid in the DEF tank. DEF is
required to maintain normal vehicle opera -
tion and emissions compliance. If some -
thing is wrong with the gauge, a DEF
Warning Message or Malfunction Indicator
Light (MIL) will be displayed. More informa -
tion is available in the instrument cluster
display section under the heading of DEF
Warning Messages. 7. 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.
NOTE:
The gauge may take up to five seconds to
update after adding a gallon or more of 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 possibly 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.
NOTE:The Instrument Cluster Warning Indicators will illu -
minate briefly for a bulb check when the ignition is
first cycled.
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.

3

23_DPF_OM_EN_USC_t.book Page 85

GETTING TO KNOW YOUR INSTRUMENT PANEL89
PREMIUM INSTRUMENT CLUSTER
D
ESCRIPTIONS — DIESEL

1. Temperature Gauge

The temperature gauge shows engine
coolant temperature. Any reading within
203°F - 230°F (95°C - 110°C) indicates
that the engine cooling system is operating
satisfactorily.
The 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. 2. Speedometer
Indicates vehicle speed.
3. Fuel Gauge
The pointer shows the level of fuel in the
fuel tank when the Keyless Push Button
Ignition is in the ON/RUN position.
 The fuel pump symbol points to
the side of the vehicle where the
fuel door is located.
4. Tachometer
Indicates the engine speed in revolutions
per minute (RPM x 1000). 5. Instrument Cluster Display
The instrument cluster display features a
driver interactive display Ú
page 89.
NOTE:The hard telltales will illuminate for a bulb check
when the ignition is first cycled.
INSTRUMENT CLUSTER DISPLAY
Your vehicle is equipped with an instrument cluster
display, which offers useful information to the
driver. With the ignition in the OFF mode, opening/
closing of a door will activate the display for
viewing, and display the total miles, or kilometers,
in the odometer. Your instrument cluster display is
designed to display important information about
your vehicle’s systems and features. Using a driver
interactive display located on the instrument
panel, your instrument cluster display can show
you how systems are working and give you
warnings when they are not. The steering wheel
mounted controls allow you to scroll through the
main menus and submenus. You can access the
specific information you want and make selections
and adjustments.
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 Úpage 368.
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

23_DPF_OM_EN_USC_t.book Page 89

104GETTING 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 system 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
Ú
page 335.
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 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 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.
NOTE:This light may turn on if the accelerator and brake
pedals are pressed at the same time.
If the light continues to flash when the vehicle is
running, immediate service is required and you
may experience reduced performance, an
elevated/rough idle, or engine stall and your
vehicle may require towing. The light will come on
when the ignition is placed in the ON/RUN or ACC/
ON/RUN position and remain on briefly as a bulb
check. If the light does not come on during starting,
have the system checked by an authorized dealer.

23_DPF_OM_EN_USC_t.book Page 104