oil temperature JEEP GLADIATOR 2023 Owners Manual

7
TOWING A DISABLED VEHICLE .......................... 350 Four–Wheel Drive Models ............................ 351
Without The Key Fob ..................................... 351
Emergency Tow Hooks —
If Equipped .................................................... 351
ENHANCED ACCIDENT RESPONSE SYSTEM
(EARS) .................................................................. 352
EVENT DATA RECORDER (EDR) ......................... 352
SERVICING AND MAINTENANCE
SCHEDULED SERVICING — GASOLINE
ENGINE ................................................................. 353
Maintenance Plan ......................................... 354
SCHEDULED SERVICING — DIESEL ENGINE .... 357
Maintenance Plan — Diesel Fuel Up To
B5 Biodiesel................................................... 358Additional Maintenance — B6 To B20
Biodiesel ........................................................ 361
ENGINE COMPARTMENT .................................... 362
3.6L Gasoline Engine ................................... 3623.0L Diesel Engine ........................................ 363
Checking Oil Level ......................................... 364
Adding Washer Fluid ..................................... 364
Maintenance-Free Battery ............................ 364
Pressure Washing ......................................... 365 VEHICLE MAINTENANCE..................................... 365
Engine Oil ....................................................... 365
Engine Oil Filter ............................................. 366Engine Air Cleaner Filter ............................... 366
Draining Fuel/Water Separator Filter —
Diesel Engine ................................................. 368
Fuel Filter Replacement — Diesel Engine .... 369
Priming If The Engine Has Run Out Of
Fuel — Diesel Engine .................................... 370
Intervention Regeneration Strategy —
Message Process Flow ................................ 371Diesel Exhaust Fluid ..................................... 371
Accessory Drive Belt Inspection ................... 372Air Conditioner Maintenance........................ 372
Body Lubrication ........................................... 374Windshield Wiper Blades.............................. 374Exhaust System ............................................ 376
Cooling System .............................................. 377
Charge Air Cooler — Inter-Cooler
(Diesel Engine) .............................................. 379
Brake System ............................................... 380
Front/Rear Axle Fluid ................................... 380Transfer Case ............................................... 381
Manual Transmission — If Equipped............ 381
Automatic Transmission —
If Equipped .................................................... 381
Fuses ............................................................. 382Bulb Replacement ........................................ 392 TIRES ..................................................................... 395
Tire Safety Information ................................. 395
Tires — General Information ......................... 401
Tire Types....................................................... 405Spare Tires — If Equipped ............................ 406
Wheel And Wheel Trim Care......................... 407
Snow Traction Devices ................................. 408
Tire Rotation Recommendations ................. 409
DEPARTMENT OF TRANSPORTATION
UNIFORM TIRE QUALITY GRADES .................... 410
Treadwear...................................................... 410
Traction Grades ............................................. 410Temperature Grades..................................... 410
STORING THE VEHICLE ....................................... 411
BODYWORK .......................................................... 411
Protection From Atmospheric Agents .......... 411
Body And Underbody Maintenance ............. 412
Preserving The Bodywork ............................. 412
INTERIORS ........................................................... 414
Carpet Safety Information ............................ 414
Carpet Removal............................................. 415Seats And Fabric Parts ................................. 416
Plastic And Coated Parts .............................. 417
Leather Surfaces........................................... 417
Glass Surfaces ............................................. 417

23_JT_OM_EN_USC_t.book Page 7

11
CAMPERS
This vehicle is NOT recommended for slide-in camper applications.
VEHICLE MODIFICATIONS/ALTERATIONS
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 132.
NOTE:Warning and Indicator lights are different based upon equipment options and
current vehicle status. Some telltales are optional and may not appear.
WARNING!
Any modifications or alterations to this vehicle could seriously affect its
roadworthiness and safety and may lead to a collision resulting in serious
injury or death.
Red Warning LightsAir Bag Warning Light Úpage 132
Brake Warning Light Úpage 132
Battery Charge Warning Light
Úpage 133
Door Open Warning Light Úpage 133
Electric Power Steering (EPS) Fault Warning Light Úpage 133
Electronic Throttle Control (ETC) Warning Light Úpage 133
Engine Coolant Temperature Warning Light Úpage 133
Hood Open Warning Light Úpage 133
Oil Pressure Warning Light Úpage 134
Oil Temperature Warning Light Úpage 134
Red Warning Lights1

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118GETTING TO KNOW YOUR INSTRUMENT PANEL
Use this QR code to access your
digital experience.
INSTRUMENT CLUSTER
D
ESCRIPTIONS

1.
Tachometer
Indicates the engine speed in revolutions
per minute (RPM x 1000).
2. Temperature Gauge
The temperature gauge shows engine
coolant temperature. Any reading 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. 3.
Instrument Cluster Display
The instrument cluster display features a
driver interactive display Ú page 121.
4. 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 Ú page 191.
5. Speedometer
Indicates vehicle speed.CAUTION!
Do not operate the engine with the tachometer
pointer in the red area. Engine damage will
occur.
WARNING!
A hot engine cooling system is dangerous. You or
others could be badly burned by steam or boiling
coolant. It is recommended that you 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 “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.

23_JT_OM_EN_USC_t.book Page 118

GETTING TO KNOW YOUR INSTRUMENT PANEL121
INSTRUMENT CLUSTER DESCRIPTIONS

1.
Tachometer
Indicates the engine speed in revolutions
per minute (RPM x 1000).
2. Temperature Gauge
The temperature gauge shows engine
coolant temperature. Any reading 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. 3.
Instrument Cluster Display
The instrument cluster display features a
driver interactive display Ú page 121.
4. 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 Ú page 191.
5. Speedometer
Indicates vehicle speed.
INSTRUMENT CLUSTER DISPLAY
Your vehicle will be 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 (kilometers)
in the odometer. Your instrument cluster display is
designed to display important information about
your vehicle’s systems and features. The driver
interactive display, located in the instrument
panel, indicates how systems are operating and
gives you warnings when a system, or systems,
needs your attention. The steering wheel mounted
controls allow you to scroll through and enter the
main menus and submenus. You can access the
specific information you want to make selections
and adjustments.
CAUTION!
Do not operate the engine with the tachometer
pointer in the red area. Engine damage will
occur.
WARNING!
A hot engine cooling system is dangerous. You or
others could be badly burned by steam or boiling
coolant. It is recommended that you 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 “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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122GETTING TO KNOW YOUR INSTRUMENT PANEL
INSTRUMENT CLUSTER DISPLAY
L
OCATION AND CONTROLS
The Instrument Cluster Display is located in the
center of the instrument cluster. The display
contains different areas of vehicle information.

Instrument Cluster Display Location

The top line where Reconfigurable Telltales,
Compass Direction, Outside Temperature, Time,
Range, Audio Info, MPG or Trip are displayed.
This also displays the Speedometer which is an
option for the upper center reconfigurable, but
is not the default. Default setting is Menu Title.
The main display area where the menus and
pop-up messages are displayed.
The lower line where telltales, menu name and
menu page are displayed.
The system allows the driver to select information
by pushing the following buttons mounted on the
steering wheel:

Instrument Cluster Display Control Buttons

Up And Down Arrow Buttons:
Using the up or down arrow button allow you
to cycle through the Main Menu Items. They allow you to change the Main Screen area
and Menu Title area.
Left
And Right Arrow Buttons:
Using the left or right arrow button allow you
to cycle through the submenu screens of the Main
menu item.
OK Button
Push the OK button to access/select the
information screens or submenu screens of a main
menu item. To reset displayed/selected features
push and hold the OK button for two seconds.
OIL LIFE RESET — IF EQUIPPED
Use this QR code to access your
digital experience.
Your vehicle may be equipped
with an engine oil change
indicator system. The “Oil Change
Required” message will display in
the instrument cluster display for
five seconds after a single chime has sounded to
indicate the next scheduled oil change interval.
The engine oil change indicator system is duty
cycle based, which means the engine oil change
interval may fluctuate, dependent upon your
personal driving style.
Unless reset, this message will continue to display
each time you place the ignition in the ON/RUN
position. To turn off the message temporarily, push
1 — Instrument Cluster Display Screen
2 — Instrument Cluster Display Controls
1 — Left Arrow Button
2 — Up Arrow Button
3 — Right Arrow Button
4 — Down Arrow Button
5 — OK Button

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124GETTING TO KNOW YOUR INSTRUMENT PANEL
INSTRUMENT CLUSTER DISPLAY MENU
I
TEMS
NOTE:Depending on the vehicle’s options, feature
settings may vary.
Speedometer
Push and release the up or down arrow
button until the speedometer menu icon is
displayed in the instrument cluster display. Push
and release the OK button to toggle between mph
and km/h.
Vehicle Info
Push and release the up or down arrow
button until the Vehicle Info menu icon is displayed
in the instrument cluster display. Push and release
the left or right arrow button to scroll
through the information submenus and push and
release the OK button to select or reset the
resettable submenus.
Off Road — If Equipped
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.
Transfer Case Lock Status: displays “Lock”
graphic only during 4WD High, 4WD Auto, or
4WD Low status.
Axle Lock And Sway Bar Status (if equipped):
displays front and rear or rear only axle locker
graphic, and sway bar connection graphic with
text message (connected or disconnected).
Pitch And Roll
Displays the pitch and roll of the vehicle in the
graphic with the angle number on the screen.
NOTE:When vehicle speed becomes too high to display
the pitch and roll, “- -” will display in place of the
numbers, and the graphic will be grayed out. A
message indicating the necessary speed for the
feature to become available will also display.
Driver Assist — If Equipped
The Driver Assist menu displays the status of the
ACC system.
Push and release the up or down arrow
button until the Driver Assist menu is displayed in
the instrument cluster display.
Adaptive Cruise Control (ACC) Feature —
If Equipped
The instrument cluster display displays the current
ACC system settings. The information displayed
depends on ACC system status.
Push the ACC ON/OFF button (located on the
steering wheel) until one of the following displays
in the instrument cluster display:
Adaptive Cruise Control Off
When ACC is deactivated, the display will read
“Adaptive Cruise Control Off.”
Adaptive Cruise Control Ready
When ACC is activated but the vehicle speed
setting has not been selected, the display will read
“Adaptive Cruise Control Ready.”
Push the SET + or the SET - button (located on the
steering wheel), and the following will display in the
instrument cluster display.
Tire Pressure
Coolant Temperature
Transmission
Temperature —
Automatic
Transmission Only Oil Pressure
Oil Temperature Oil Life
Battery Voltage Diesel Exhaust Fluid
Level — If Equipped

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128GETTING TO KNOW YOUR INSTRUMENT PANEL
What to do when an electrical load reduction
action message is present (“Battery Saver On” or
“Battery Saver Mode”)
During a trip:
Reduce power to unnecessary loads if possible:
Turn off redundant lights (interior or exte -
rior)
Check what may be plugged in to power
outlets +12 Volt, 115 Volts AC, USB ports
Check HVAC settings (blower, temperature)
Check the audio settings (volume)
After a trip:
Check if any aftermarket equipment was
installed (additional lights, upfitter electrical
accessories, audio systems, alarms) and review
specifications if any (load and ignition off draw
currents).
Evaluate the latest driving cycles (distance,
driving time and parking time).
The vehicle should have service performed if
the message is still present during consecutive
trips and the evaluation of the vehicle and
driving pattern did not help to identify the cause.
DIESEL DISPLAYS
When the appropriate conditions exist, the
following messages display in the instrument
cluster display:
Exhaust Filter Nearing Full Safely Drive at
Consistent Speeds to Clear
Exhaust Filter Full – Power Reduced See Dealer
Exhaust System Service Required – See Dealer
Exhaust System – Filter XX% Full Service
Required See Dealer
Exhaust System Regeneration in Process
Continue Driving
Exhaust System – Regeneration Completed
DIESEL PARTICULATE FILTER (DPF)
M
ESSAGES
This engine meets all required diesel engine
emissions standards. To achieve these emissions
standards, your vehicle is equipped with a
state-of-the-art engine and exhaust system. These
systems are seamlessly integrated into your
vehicle and managed by the Powertrain Control
Module (PCM). The PCM manages engine combustion to allow the exhaust system’s catalyst
to trap and burn Particulate Matter (PM)
pollutants, with no input or interaction on your part.
WARNING!
A malfunctioning catalytic converter, as
previously referenced, can reach higher
temperatures than in normal operating
conditions. This can cause a fire if you drive
slowly or park over flammable substances such
as dry plants, wood, cardboard, etc. This could
result in death or serious injury to the driver,
occupants or others.
CAUTION!
The engine may be switched off even if the
warning light is on: repeated interruptions of the
regeneration process could cause an early
deterioration of engine oil. For this reason it is
always advisable to wait for the symbol to go off
before turning off the engine, following the
previously mentioned instructions. Do not
complete the DPF regeneration process when
the vehicle is stopped.

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134GETTING TO KNOW YOUR INSTRUMENT PANEL
Oil Pressure Warning Light
This warning light will illuminate, and a
chime will sound, to indicate low engine
oil pressure. If the light and chime turn on
while driving, safely stop the vehicle and
turn off the engine as soon as possible. After the
vehicle is safely stopped, restart the engine and
monitor the Oil Pressure Warning Light. If the Oil
Pressure Warning Light is still illuminated, turn the
engine OFF and contact an authorized dealer for
further assistance. Do not operate the vehicle until
the cause is corrected. If the light is no longer
illuminated, the engine can be operated but it is
recommended to take the vehicle to an authorized
dealer as soon as possible.
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.
Seat Belt Reminder Warning Light
This warning light indicates when the
driver or passenger seat belt is
unbuckled. When the ignition is first
placed in the ON/RUN or ACC/ON/RUN
position and if the driver’s seat belt is unbuckled,
a chime will sound and the light will turn on. When
driving, if the driver or front passenger seat belt
remains unbuckled, the Seat Belt Reminder Light
will flash or remain on continuously and a chime
will sound Ú page 299.
Rear Seat Belt Reminder Indicator Light —
If Equipped With A Base Instrument
Cluster
This light indicates when a rear seat belt
is unbuckled in the second row. When
the ignition is first placed in the ON/RUN
or ACC/ON/RUN position, and if a seat
belt in the second row is unbuckled, a light
corresponding to the specific seat will turn on in
the upper right portion of the instrument cluster
display, momentarily replacing the configurable
corner information. If a second row seat belt that
was buckled at the start of the trip is unbuckled,
the Rear Seat Belt Reminder Light will change from
the buckled to the unbuckled symbol, and a chime
will sound Ú page 299.
Transmission Temperature Warning
Light — If Equipped

This warning light will illuminate to warn of
a high transmission fluid temperature.
This may occur with strenuous usage such
as trailer towing. If this light turns on, stop
the vehicle and run the engine at idle or slightly
faster, with the transmission in PARK (P) or NEUTRAL
(N), until the light turns off. Once the light turns off,
you may continue to drive normally. If Manual
transmission equipped, this warning will illuminate
to warn of high clutch temperature. This may occur
with driver misuse of clutch pedal or resting foot on
the clutch pedal or partially engaging the clutch for
longer duration. If the light turns on, it will be with an
additional CLUTCH HOT message. Stop the vehicle
safely and run the engine at idle with transmission
gear in NEUTRAL (N) until the light turns off. Once the
light turns off, follow the message displayed in the
instrument cluster.

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GETTING TO KNOW YOUR INSTRUMENT PANEL135
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.
YELLOW WARNING LIGHTS
Anti-Lock Brake System (ABS) Warning
Light
This warning light monitors the ABS. The
light will turn on when the ignition is
placed in the ON/RUN or ACC/ON/RUN
position and may stay on for as long as
four seconds.
If the ABS light remains on or turns on while
driving, then the Anti-Lock portion of the brake
system is not functioning and service is required as
soon as possible. However, the conventional brake
system will continue to operate normally,
assuming the Brake Warning Light is not also on.
If the ABS light does not turn on when the ignition
is placed in the ON/RUN or ACC/ON/RUN position,
have the brake system inspected by an authorized
dealer.
Electronic Stability Control (ESC) Active
Warning Light — If Equipped
This warning light will indicate when the
Electronic Stability Control system is
Active. The ESC Indicator Light in the
instrument cluster will come on when the
ignition is placed in the ON/RUN or ACC/ON/RUN
position, and when ESC is activated. It should go
out with the engine running. If the ESC Indicator
Light comes on continuously with the engine
running, a malfunction has been detected in the
ESC system. If this warning light remains on after
several ignition cycles, and the vehicle has been
driven several miles (kilometers) at speeds greater
than 30 mph (48 km/h), see an authorized dealer
as soon as possible to have the problem
diagnosed and corrected.
The ESC OFF Indicator Light and the ESC Indi -
cator Light come on momentarily each time the
ignition is placed in the ON/RUN or ACC/ON/
RUN position.
The ESC system will make buzzing or clicking
sounds when it is active. This is normal; the
sounds will stop when ESC becomes inactive.
This light will come on when the vehicle is in an
ESC event.
WARNING!

If you continue operating the vehicle when the
Transmission Temperature Warning Light is illumi -
nated you could cause the fluid to boil over, come
in contact with hot engine or exhaust components
and cause a fire. If you continue to operate the
vehicle when the CLUTCH HOT message is dis -
played or Transmission Temperature Warning
Light is illuminated, you could cause the clutch to
overheat and cause a fire.

CAUTION!
Continuous driving with the Transmission Tem -
perature Warning Light illuminated will eventu -
ally cause severe transmission damage or
transmission failure. If you continue to operate
the vehicle when the CLUTCH HOT message is
displayed or Transmission Temperature Warning
Light is illuminated, you could cause the clutch
to overheat and cause severe clutch damage,
transmission damage or failure.
3

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STARTING AND OPERATING149
(Continued)
3. The system will automatically engage the
starter to crank the engine. If the vehicle fails
to start, the starter will disengage automat-
ically after 25 seconds.
4. If you wish to stop the cranking of the engine prior to the engine starting, push the ENGINE
START/STOP button again.
5. Check that the Oil Pressure Warning Light has turned off.
6. Release the parking brake.
STARTING FLUIDS
The engine is equipped with a glow plug preheating
system. If the instructions in this manual are
followed, the engine should start in all conditions
and no type of starting fluid should be used.
NORMAL OPERATION — DIESEL ENGINE
Observe the following when the diesel engine is
operating:
All message center lights are off.
Malfunction Indicator Light (MIL) is off.
Engine Oil Pressure telltale is not illuminated.
Voltmeter operation.
The voltmeter may show a gauge fluctuation at
various engine temperatures. This is caused by the
glow plug heating system. The number of cycles
and the length of the cycling operation is controlled by the engine control module. Glow plug heater
operation can run for several minutes. Once the
heater operation is complete the voltmeter needle
will stabilize.
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.
WARNING!
Do not leave children or animals inside parked
vehicles in hot weather. Interior heat build-up
may cause serious injury or death.
When leaving the vehicle, always make sure
the keyless ignition node is in the OFF posi -
tion, remove the key fob from the vehicle and
lock the vehicle.
Never leave children alone in a vehicle, or with
access to an unlocked vehicle. Allowing chil -
dren to be in a vehicle unattended is
dangerous for a number of reasons. A child or
others could be seriously or fatally injured.
Children should be warned not to touch the
parking brake, brake pedal or the gear
selector.
Do not leave the key fob in or near the vehicle,
or in a location accessible to children, and do
not leave the ignition of a vehicle equipped
with Keyless Enter ‘n Go™ in the ACC or ON/
RUN position. A child could operate power
windows, other controls, or move the vehicle.
WARNING!
4

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