ESP RAM CHASSIS CAB 2022 Owners Manual

The driver’s primary responsibility is the safe operation of the vehicle. Driving while distracted can result in loss of vehicle control, resulting
in an accident and personal injury. FCA US LLC strongly recommends that the driver use extreme caution when using any device or feature
that may take their attention off the road. Use of any electrical devices, such as cellular telephones, computers, portable radios, vehicle
navigation or other devices, by the driver while the vehicle is moving is dangerous and could lead to a serious accident. Texting while driving
is also dangerous and should never be done while the vehicle is moving. If you find yourself unable to devote your full attention to vehicle
operation, pull off the road to a safe location and stop your vehicle. Some states or provinces prohibit the use of cellular telephones or texting
while driving. It is always the driver’s responsibility to comply with all local laws.
This Owner’s Manual has been prepared to help you get acquainted with your new Ram brand vehicle and to provide a convenient
reference for common questions.
Not all features shown in this manual may apply to your vehicle. For additional information on accessories to help personalize your vehicle,
visit mopar.com/om (U.S.), owners.mopar.ca (Canada) or your local Ram brand dealer.
DRIVING AND ALCOHOL
Drunk driving is one of the most frequent causes of accidents. Your driving ability can be seriously impaired with blood alcohol levels far
below the legal minimum. If you are drinking, don’t drive. Ride with a designated non-drinking driver, call a cab, a friend or use public
transportation.
WARNING
Driving after drinking can lead to an accident. Your perceptions are less sharp, your reflexes are slower and your judgment is impaired
when you have been drinking. Never drink and then drive.
WARNING: Operating, servicing and maintaining a passenger vehicle or off-highway
motor vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates,
and lead, which are known to the State of California to cause cancer and birth defects or other
reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except
as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently
when servicing your vehicle. For more information go to www.P65Warnings.ca.gov/passenger-vehicle.
This Owner’s Manual illustrates and describes the operation of features and equipment that are either standard or optional on this vehicle.
This manual may also include a description of features and equipment that are no longer available or were not ordered on this vehicle.
Please disregard any features and equipment described in this manual that are not on this vehicle. FCA US LLC reserves the right to make
changes in design and specifications, and/or make additions to or improvements to its products without imposing any obligation upon
itself to install them on products previously manufactured.
With respect to any vehicles sold in Canada, the name FCA US LLC shall be deemed to be deleted and the name FCA Canada Inc. used in
substitution therefore.
This Owner’s Manual is intended to familiarize you with the important features of your vehicle. Your most up-to-date Owner’s Manual, Navigation/
Uconnect manuals and Warranty Booklet can be found by visiting the website on the back cover.
U.S. Residents: If you are the first registered retail owner of your vehicle, you may obtain a complimentary printed copy of the Warranty
Booklet by calling 1-866-726-4636 or by contacting your dealer. Replacement kits can be purchased by visiting www.techauthority.com.
Canadian Residents: If you are the first registered retail owner of your vehicle, you may obtain a complimentary printed copy of the
Warranty Booklet or purchase a replacement kit by calling 1-800-387-1143 or by contacting your dealer.

6
CONNECTED SERVICES FAQS ........................... 247 Connected Services SOS FAQs —
If Equipped .................................................... 248
Connected Services Remote Door Lock/
Unlock FAQs .................................................. 248
Connected Services Roadside Assistance
FAQs .............................................................. 248
Connected Services Send & Go FAQs —
If Equipped .................................................... 248
Connected Services Vehicle Finder FAQs ... 249
Connected Services Stolen Vehicle
Assistance FAQs — If Equipped ................... 249
Connected Services Remote Vehicle Start
FAQs .............................................................. 249
Connected Services Remote Horn & Lights
FAQs ............................................................... 250
Connected Services Account FAQs —
If Equipped..................................................... 250
Data Collection & Privacy.............................. 252
RADIO OPERATION AND MOBILE PHONES...... 252
Regulatory And Safety Information .............. 252
OFF-ROAD PAGES — IF EQUIPPED .................... 253
Off-Road Pages Status Bar ........................... 254
Vehicle Dynamics .......................................... 255
Accessory Gauge ........................................... 256Pitch & Roll .................................................... 257
Suspension .................................................... 258
Forward Facing Camera ................................ 258
SAFETY
SAFETY FEATURES .............................................. 259
Anti-Lock Brake System (ABS) ..................... 259
Electronic Brake Control (EBC) System ...... 260
AUXILIARY DRIVING SYSTEMS.......................... 266
Forward Collision Warning (FCW) With
Mitigation — If Equipped ............................... 266
Tire Pressure Monitoring System (TPMS) .... 268
OCCUPANT RESTRAINT SYSTEMS ................... 275
Occupant Restraint Systems Features ....... 275
Important Safety Precautions ...................... 276Seat Belt Systems ........................................ 276Supplemental Restraint Systems (SRS) ...... 284Child Restraints ............................................. 291
SAFETY TIPS ........................................................ 307
Transporting Passengers .............................. 307Transporting Pets .......................................... 307
Safety Checks You Should Make Inside
The Vehicle ................................................... 307
Periodic Safety Checks You Should Make
Outside The Vehicle ...................................... 309
Exhaust Gas .................................................. 309
Carbon Monoxide Warnings ......................... 310
IN CASE OF EMERGENCY
HAZARD WARNING FLASHERS ......................... 311
ASSIST AND SOS SYSTEM — IF EQUIPPED ...... 312
JACKING AND TIRE CHANGING ........................ 315 4500/5500 Models...................................... 315
Preparations For Jacking .............................. 316
Jacking Instructions 4500 And 5500
Series ............................................................. 316
To Stow The Flat Or Spare — If Equipped ... 318Hub Caps/Wheel Covers — If Equipped....... 318
JUMP STARTING ................................................. 319
Preparations For Jump Start ........................ 320Jump Starting Procedure .............................. 320
IF YOUR ENGINE OVERHEATS ........................... 322
GEAR SELECTOR OVERRIDE .............................. 322
6–Speed Transmission ................................ 322
MANUAL PARK RELEASE ................................... 323
8–Speed Transmission................................. 323
FREEING A STUCK VEHICLE .............................. 324
TOWING A DISABLED VEHICLE .......................... 325
Two-Wheel Drive Models .............................. 326
Four-Wheel Drive Models ............................. 326Emergency Tow Hooks — If Equipped .......... 327
ENHANCED ACCIDENT RESPONSE SYSTEM
(EARS) .................................................................. 327
EVENT DATA RECORDER (EDR) ......................... 327

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GETTING TO KNOW YOUR VEHICLE25
The driver’s door will unlock automatically if the
keys are detected inside the vehicle when the door
lock button on the front door panel is used to lock
the door. This will occur for two attempts. Upon the
third attempt, the doors will lock even if the key is
inside.
NOTE:If the key fob is located next to a mobile phone,
laptop, or other electronic device, the wireless
signal may get blocked, and the driver’s door may
not unlock automatically.
If the door lock switch is pushed while the ignition
is in ACC or ON/RUN and the driver's door is open,
the doors will not lock.
KEYLESS ENTER ‘N GO™ —
P
ASSIVE ENTRY (IF EQUIPPED)
The Passive Entry system is an enhancement to
the vehicle’s Remote Keyless Entry system and a
feature of Keyless Enter ‘n Go™. This feature
allows you to lock and unlock the vehicle’s door(s)
without having to push the key fob lock or unlock
buttons.
NOTE:
Passive Entry may be programmed on/off within
Uconnect Settings Ú page 191.
If wearing gloves or if it has been raining/
snowing on the Passive Entry door handle, the
unlock sensitivity can be affected, resulting in a
slower response time.
If the vehicle is unlocked by Passive Entry and
no door is opened within 60 seconds, the
vehicle will relock and if equipped will arm the
security alarm.
The Vehicle Security system can be armed/
disarmed by pushing the Passive Entry key fob
lock/unlock buttons (if equipped).
The key fob may not be detected by the vehicle
Passive Entry system if it is located next to a
mobile phone, laptop or other electronic device;
these devices may block the key fob's wireless
signal and prevent the Passive Entry door
handle from locking/unlocking the vehicle.
To Unlock From The Driver or Passenger Side:
With a valid Passive Entry key fob within 5 ft
(1.5 m) of the door handle, grab the handle to
unlock the vehicle. Grabbing the driver’s door
handle will unlock the driver’s door automatically.
Grabbing the passenger door handle will unlock all
doors automatically. The interior door panel lock
knob will raise when the door is unlocked.
Grab The Door Handle To Unlock
NOTE:
Either the driver’s door only or all doors will
unlock when you grab hold of the front driver’s
door handle, depending on the selected setting
in the Uconnect system Ú
page 191.
All doors will unlock when the front passenger
door handle is grabbed regardless of the
driver’s door unlock preference setting.
Preventing Inadvertent Locking Of Passive Entry
Key Fob In Vehicle:
To minimize the possibility of unintentionally
locking a Passive Entry key fob inside your vehicle,
the Passive Entry system is equipped with an
automatic door unlock feature which will function if
the ignition switch is in the OFF position.
If one of the vehicle doors is open and the door
panel switch is used to lock the vehicle, once all
open doors have been closed the vehicle checks
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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 control button is
located on the center instrument panel below the
touchscreen, as well as within the climate or
controls screen of the touchscreen.
Push the heated steering wheel button once to
turn the heating element on.
Push 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.
BASIC VOICE COMMANDS
The basic Voice Commands below can be given at
any point while using your Uconnect system.

Push the VR button or for the Uconnect 5/5 NAV,
say the vehicle’s Wake Up word, “Hey Uconnect”.
After the beep, say:

“ Cancel ” to stop a current voice session
“Help ” to hear a list of suggested Voice
Commands
“ Repeat ” to listen to the system prompts again
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.

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GETTING TO KNOW YOUR VEHICLE33
Power Lumbar — If Equipped
Vehicles equipped with power driver or passenger
seats may also be equipped with power lumbar.
The power lumbar switch is located on the
outboard side of the power seat. Push the switch
forward to increase the lumbar support. Push the
switch rearward to decrease the lumbar support.

Lumbar Control Switch

Easy Entry/Exit Seat
This feature provides automatic driver’s seat
positioning to enhance driver mobility when
entering and exiting the vehicle.
The distance the driver’s seat moves depends on
where you have the driver’s seat positioned when
you remove the key fob from the ignition.
When you place the ignition in the OFF position,
the driver’s seat will move about 2.4 inches
(60 mm) rearward if the driver’s seat position is
greater than or equal to 2.7 inches (67.7 mm)
forward of the rear stop. The seat will return to
its previously set position when you place the
ignition into the ACC or RUN position.
When you place the ignition in the OFF position,
the driver’s seat will move to a position
0.3 inches (7.7 mm) forward of the rear stop if
the driver’s seat position is between 0.9 inches
and 2.7 inches (22.7 mm and 67.7 mm)
forward of the rear stop. The seat will return to
its previously set position when you place the
ignition to the ACC or RUN position.
The Easy Entry/Exit feature is disabled when the
driver’s seat position is less than 0.9 inches
(22.7 mm) forward of the rear stop. At this posi -
tion, there is no benefit to the driver by moving
the seat for Easy Exit or Easy Entry.
When enabled in Uconnect Settings, Easy Entry
and Easy Exit positions are stored in each memory
setting profile Ú page 29.
NOTE:The Easy Entry/Exit feature is enabled or disabled
through the programmable features in the
Uconnect system Ú page 191.
HEATED SEATS — IF EQUIPPED
On some models, the front and rear seats may be
equipped with heaters located in the seat cushions
and seatbacks.
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
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 seatback
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 over -
heated could cause serious burns due to the
increased surface temperature of the seat.
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GETTING TO KNOW YOUR VEHICLE51
transmission is in PARK, NEUTRAL, or REVERSE.
The trailer spotter lights will turn off when the
vehicle transmission is placed in DRIVE.
BATTERY SAVER
Timers are set to both the interior and exterior
lights to protect the life of your vehicle’s battery.
If the ignition is OFF, the interior lights will
automatically turn off when:
Any door is left ajar for 10 minutes.
The Dome Off button is pushed.
The cargo and spotter lights are manually acti -
vated by the headlight switch.
NOTE:Battery saver mode is canceled if the ignition is ON.
If the headlights remain on while the ignition is
placed in the OFF position, the exterior lights will
automatically turn off after eight minutes. If the
headlights are turned on and left on for eight
minutes while the ignition is OFF, the exterior lights
will automatically turn off.
INTERIOR LIGHTS
COURTESY LIGHTS
The courtesy, dome, and cargo lights are turned on
when any door is opened or the Dome On button is
pushed on the overhead console. Also, if your vehicle is equipped with Remote Keyless Entry,
and the unlock button is pushed on the key fob, the
courtesy, dome, and cargo lights will turn on.
Courtesy/Reading Lights
The overhead console lights can also be operated
individually as reading lights by pushing the
corresponding buttons.

Front Courtesy/Reading Lights Front Courtesy/Reading Lights

NOTE:On vehicles equipped with an LED overhead
console, if both the Dome On and Dome Off
buttons are pushed, the Illuminated Entry with
door ajar feature will be disabled, but the Dome
Lights inside the vehicle will turn on.
Three types of Rear Courtesy/Reading Lights are
available for your vehicle:
Push button on/off
Push lens on/off
No on/off button, just Courtesy Light
1 — Driver’s Reading Light On/Off Button
2 — Dome Off Button
3 — Dome On Button
4 — Passenger’s Reading Light On/Off Button
1 — Driver’s Reading Light On/Off Button
2 — Dome Off Button
3 — Passenger’s Reading Light On/Off Button
4 — Dome On Button
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GETTING TO KNOW YOUR INSTRUMENT PANEL99
Low Fuel Warning Light
When the fuel level reaches
approximately 3.2 gal (12 L) this light will
turn on, and remain on until fuel is
added.
A single warning chime will sound with Low Fuel
Warning.
Low Coolant Level Warning Light
This telltale will turn on to indicate the
vehicle coolant level is low Ú page 341.
Loose Fuel Filler Cap Warning Light —
If Equipped
This warning light will illuminate when the
fuel filler cap is loose. Properly close the
filler cap to disengage the light. If the
light does not turn off, please see an
authorized dealer.
Tire Pressure Monitoring System (TPMS)
Warning Light — If Equipped
The warning light switches on and a
message is displayed to indicate that the
tire pressure is lower than the
recommended value and/or that slow
pressure loss is occurring. In these cases, optimal
tire duration and fuel consumption may not be
guaranteed. Should one or more tires be in the condition
mentioned above, the display will show the
indications corresponding to each tire.
Each tire, including the spare (if provided), should
be checked monthly when cold and inflated to the
inflation pressure recommended by the vehicle
manufacturer on the vehicle placard or tire
inflation pressure label. If your vehicle has tires of
a different size than the size indicated on the
vehicle placard or tire inflation pressure label, you
should determine the proper tire inflation pressure
for those tires.
As an added safety feature, your vehicle has been
equipped with a TPMS that illuminates a low tire
pressure telltale when one or more of your tires is
significantly underinflated. Accordingly, when the
low tire pressure telltale illuminates, you should
stop and check your tires as soon as possible, and
inflate them to the proper pressure. Driving on a
significantly underinflated tire causes the tire to
overheat and can lead to tire failure. Underinflation also reduces fuel efficiency and tire tread life, and
may affect the vehicle’s handling and stopping
ability.
Please note that the TPMS is not a substitute for
proper tire maintenance, and it is the driver’s
responsibility to maintain correct tire pressure,
even if underinflation has not reached the level to
trigger illumination of the TPMS low tire pressure
telltale.
Your vehicle has also been equipped with a TPMS
malfunction indicator to indicate when the system
is not operating properly. The TPMS malfunction
indicator is combined with the low tire pressure
telltale. When the system detects a malfunction,
the telltale will flash for approximately one minute
and then remain continuously illuminated. This
sequence will continue upon subsequent vehicle
start-ups as long as the malfunction exists. When
the malfunction indicator is illuminated, the
system may not be able to detect or signal low tire
pressure as intended. TPMS malfunctions may
occur for a variety of reasons, including the
installation of replacement or alternate tires or
wheels on the vehicle that prevent the TPMS from
functioning properly. Always check the TPMS
malfunction telltale after replacing one or more
tires or wheels on your vehicle to ensure that the
replacement or alternate tires and wheels allow
the TPMS to continue to function properly.
CAUTION!
Do not continue driving with one or more flat
tires as handling may be compromised. Stop the
vehicle, avoiding sharp braking and steering. If a
tire puncture occurs, repair immediately using
the dedicated tire repair kit and contact an
authorized dealer as soon as possible.
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102GETTING TO KNOW YOUR INSTRUMENT PANEL
Automatic Diesel Exhaust Brake Indicator
Light — If Equipped
This indicator light will illuminate when
the Diesel Exhaust Brake has been
activated, and has switched to Automatic
mode Úpage 141.
ECO Mode Indicator Light — If Equipped
This light will turn on when ECO mode is
active.
Parking/Headlights On Indicator Light
This indicator light will illuminate when
the parking lights or headlights are
turned on.
LaneSense Indicator Light — If Equipped
The LaneSense indicator light illuminates
solid green when both lane markings
have been detected and the system is
“armed” and ready to provide visual and
torque warnings if an unintentional lane departure
occurs Ú page 156.
Front Fog Indicator Light — If Equipped
This indicator light will illuminate when
the front fog lights are on.
Turn Signal Indicator Lights
When the left or right turn signal is
activated, the turn signal indicator will
flash independently and the
corresponding exterior turn signal lamps
will flash. Turn signals can be activated when the
multifunction lever is moved down (left) or up
(right).
NOTE:
A continuous chime will sound if the vehicle is
driven more than 1 mile (1.6 km) with either
turn signal on.
Check for an inoperative outside light bulb if
either indicator flashes at a rapid rate.
If equipped with fog lamps, the fog lamp on
the side of the activated turn signal will also
illuminate to provide additional light when
turning.
Cruise Control Set Indicator Light —
If Equipped
This indicator light will illuminate when
the cruise control is set to the desired
speed Ú page 141.
WHITE INDICATOR LIGHTS
Adaptive Cruise Control (ACC) Ready
Light — If Equipped
This light will illuminate when the vehicle
equipped with ACC has been turned on
but not set Ú page 143.
Cruise Control Ready Indicator
This indicator light will illuminate when
the cruise control is ready, but not set
Úpage 141.
Set Speed Display
The Set Speed Display indicator light
indicates the set speed for the Speed
Control and ACC settings.
LaneSense Indicator Light — If Equipped
When the LaneSense system is ON, but
not armed, the LaneSense indicator light
illuminates solid white. This occurs when
only left, right, or neither lane line has
been detected. If a single lane line is detected, the
system is ready to provide only visual warnings if
an unintentional lane departure occurs on the
detected lane line Ú page 156.

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114STARTING AND OPERATING
COLD WEATHER PRECAUTIONS
Operation in ambient temperature below 32°F
(0°C) may require special considerations. The
following charts suggest these options:
Fuel Operating Range
NOTE:Use Ultra Low Sulfur Diesel (ULSD) Fuels ONLY.

Fuel Operating Range Chart

*Number 1 ULSD Fuel should only be used where
extended arctic conditions (0°F/-18°C) exist.
NOTE:
Use of Climatized ULSD or Number 1 ULSD Fuel
results in a noticeable decrease in fuel
economy.
Climatized ULSD Fuel is a blend of Number 2
ULSD and Number 1 ULSD Fuels which reduces
the temperature at which wax crystals form in
fuel.
The fuel grade should be clearly marked on the
pump at the fuel station.
The engine requires the use of ULSD Fuel. Use
of incorrect fuel could result in engine and
exhaust system damage Ú page 399.
If climatized or diesel Number 1 ULSD Fuel is
not available, and you are operating below
(20°F/-6°C), in sustained arctic conditions,
Mopar® Premium Diesel Fuel Treatment (or
equivalent) is recommended to avoid gelling
(see Fuel Operating Range Chart).

Under some circumstances increased engine
noise may be audible in the seconds following a
cold start. This is most likely to occur when using
fuel that isn't blended for the ambient tempera -
ture present. This may occur on an unseasonably
cold day or when a truck is fueled in a warmer
climate and driven to a colder climate. The noise
can typically be prevented by using Mopar®
Premium Diesel Fuel Treatment as recom -
mended (see Fuel Operating Range Chart).

Engine Oil Usage
For the correct engine oil viscosity Ú page 341.
Winter Front Cover Usage
A Winter front or cold weather cover is to be used
in ambient temperatures below 32°F (0°C),
especially during extended idle conditions. This
cover is equipped with four flaps for managing
total grille opening in varying ambient
temperatures. If a Winter front or cold weather
cover is to be used the flaps should be left in the
full open position to allow air flow to the charge air
cooler and automatic transmission oil cooler.
When ambient temperatures drop below 0°F
(-17°C) the four flaps need to be closed. A suitable
cold weather cover is available from a Mopar®
dealer.
Battery Blanket Usage
A battery loses 60% of its cranking power as the
battery temperature decreases to 0°F (-18°C). For
the same decrease in temperature, the engine
requires twice as much power to crank at the same
RPM. The use of 120 Volt AC powered battery
blankets will greatly increase starting capability at
low temperatures. Suitable battery blankets are
available from an authorized Mopar® dealer.

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STARTING AND OPERATING115
Engine Warm-Up
Avoid full throttle operation when the engine is
cold. When starting a cold engine, bring the engine
up to operating speed slowly to allow the oil
pressure to stabilize as the engine warms up.
NOTE:High-speed, no-load running of a cold engine can
result in excessive white smoke and poor engine
performance. No-load engine speeds should be
kept under 1,000 RPM during the warm-up period,
especially in cold ambient temperature conditions.
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.
NOTE:If ambient temperatures are low and the coolant
temperature is below 180°F (82°C), the engine
idle speed will slowly increase to 1,000 RPM after
two minutes of idle, if the following conditions are
met:
Foot is off brake pedal and throttle pedal.
Automatic transmission is in PARK.
Vehicle speed is 0 mph (0 km/h).
Applying the throttle will cancel fast idle.
Operating the exhaust brake at idle will greatly
improve warm-up rate and will help keep the
engine close to operating temperature during
extended idle.
ENGINE IDLING
Avoid prolonged idling. Long periods of idling may
be harmful to your engine because combustion
chamber temperatures can drop so low that the
fuel may not burn completely. Incomplete
combustion allows carbon and varnish to form on
piston rings, engine valves, and injector nozzles.
Also, the unburned fuel can enter the crankcase,
diluting the oil and causing rapid wear to the
engine.
If the engine is allowed to idle or the truck is driven
on low engine speed drive cycles for more than two
hours, the system will automatically enter an
emissions operating mode that will increase the
engine idle speed to 900 RPM (1,050 RPM for
Chassis Cab). While in this mode, which is
designed to help maintain the Diesel Particulate
Filter, the engine idle speed will return to normal
when the brake pedal is applied. A small change in
engine tone or a slight change in engine
performance while accelerating may also be
noticeable at speeds below 20 mph (32 km/h). This operating mode may last for up to an hour of
idle time, or around 20 minutes of driving time.
Your truck may have been ordered with an optional
voltage monitoring idle up feature. If a load is
placed on the electrical system while the truck is in
PARK, this feature will attempt to maintain normal
system voltage by automatically increasing engine
idle speed. You may notice several consecutive
increases in idle speed, up to a maximum of
1,450 RPM, as the system will attempt to utilize
the smallest increase in idle speed necessary to
maintain normal system voltage. The idle speed
will return to normal when either the electrical load
is removed, or when the brake pedal is applied.
NOTE:For instrument cluster display messages related to
the vehicle's exhaust system Ú
page 81.
Idle-Up Feature
The driver-controlled high idle speed feature will
help increase cylinder temperatures and provide
additional cab heat, however, excessive idling may
still cause the exhaust after-treatment system to
not properly regenerate. Extended periods of idle
time should be avoided.
The Idle-Up feature uses the Cruise Control buttons
to increase engine idle speed and quickly warm the
vehicle's interior.
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