2023 JEEP GLADIATOR maintenance

TABLE OF CONTENTS
1
2
3
4
5
6
7
8
9
10
11
1 INTRODUCTION .............................................................................................................................. 9
2 GETTING TO KNOW YOUR VEHICLE ..................................................................................15
3 GETTING TO KNOW YOUR INSTRUMENT PANEL ....................................................... 116
4 STARTING AND OPERATING ...............................................................................................144 5 MULTIMEDIA ............................................................................................................................... 214
6 SAFETY ........................................................................................................................................ 279 7 IN CASE OF EMERGENCY .................................................................................................... 332
8 SERVICING AND MAINTENANCE ...................................................................................... 353
9 TECHNICAL SPECIFICATIONS ............................................................................................. 418
10 CUSTOMER ASSISTANCE ..................................................................................................... 428 11 INDEX ............................................................................................................................................. 433

23_JT_OM_EN_USC_t.book Page 1

4
INSTRUMENT CLUSTER DISPLAY ...................... 121 Instrument Cluster Display Location And
Controls .......................................................... 122
Oil Life Reset — If Equipped

S
................... 122
Off Road+ Display — If Equipped .................. 123
Instrument Cluster Display Selectable
Items .............................................................. 123
Instrument Cluster Display Menu Items ...... 124
Battery Saver On, Battery Saver Mode
Message, And Electrical Load Reduction
Actions
(If Equipped) .................................................. 127
Diesel Displays .............................................. 128 Diesel Particulate Filter (DPF) Messages .... 128Fuel System Messages ................................. 130
WARNING LIGHTS AND MESSAGES ................. 132
Red Warning Lights ....................................... 132
Yellow Warning Lights ................................... 135Yellow Indicator Lights .................................. 138
Green Indicator Lights................................... 139White Indicator Lights ................................... 140Blue Indicator Lights ..................................... 141
ONBOARD DIAGNOSTIC SYSTEM — OBD II ...... 141
Onboard Diagnostic System
(OBD II) Cybersecurity ................................... 142
EMISSIONS INSPECTION AND MAINTENANCE
PROGRAMS .......................................................... 142
STARTING AND OPERATING
STARTING THE ENGINE — GASOLINE ENGINE
(IF EQUIPPED) ...................................................... 144
Manual Transmission — If Equipped ........... 144Automatic Transmission —
If Equipped .................................................... 144
Normal Starting ............................................ 144
AutoPark ........................................................ 145Extreme Cold Weather
(Below –22°F Or −30°C) ............................ 146
Extended Park Starting ................................. 146
If Engine Fails To Start ................................. 147
After Starting ................................................. 147
STARTING THE ENGINE — DIESEL ENGINE
(IF EQUIPPED) ...................................................... 147
Automatic Transmission ............................... 148
Extreme Cold Weather .................................. 148
Normal Starting ............................................. 148Starting Fluids ............................................... 149
NORMAL OPERATION — DIESEL ENGINE ......... 149
Cold Weather Precautions ............................ 149
Engine Idling .................................................. 150
Stopping The Engine ..................................... 150
Cooling System Tips — Automatic
Transmission ................................................. 151
ENGINE BREAK-IN RECOMMENDATIONS —
GASOLINE ENGINE (IF EQUIPPED) ................... 151 ENGINE BREAK-IN RECOMMENDATIONS —
DIESEL ENGINE (IF EQUIPPED) .......................... 152
PARKING BRAKE ................................................. 152
MANUAL TRANSMISSION — IF EQUIPPED ....... 153
Shifting........................................................... 154
Downshifting.................................................. 155
AUTOMATIC TRANSMISSION —
IF EQUIPPED ......................................................... 155
Ignition Park Interlock................................... 156
Brake/Transmission Shift Interlock (BTSI)
System .......................................................... 1578–Speed Automatic Transmission .............. 157
Gear Ranges .................................................. 157
FOUR–WHEEL DRIVE OPERATION ................... 161
Four-Position Transfer Case —
If Equipped .................................................... 161
Five-Position Transfer Case —
If Equipped .................................................... 163
Trac-Lok Rear Axle — If Equipped ................ 165Axle Lock (Tru-Lok) Front And Rear —
If Equipped ................................................... 165
Axle Lock (Tru-Lok) Rear Only —
If Equipped ................................................... 166
Electronic Sway Bar Disconnect —
If Equipped ................................................... 166
OFF ROAD+ — If Equipped ............................ 168
ELECTRO-HYDRAULIC POWER STEERING ....... 168

23_JT_OM_EN_USC_t.book Page 4

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

9
INTRODUCTION
Dear Customer,
Congratulations on the purchase of your Jeep® vehicle. Be assured that it represents precision workmanship, distinctive styling, and high quality.
This is a specialized utility vehicle. It can go places and perform tasks that are not intended for conventional passenger vehicles. It handles and maneuvers
differently from many passenger vehicles, both on-road and off-road, so take time to become familiar with your vehicle. If equipped, the two-wheel drive version
of this vehicle is designed for on-road use only. It is not intended for off-road driving or use in other severe conditions suited for a four-wheel drive vehicle. Before
you start to operate this vehicle, read the Owner’s Manual. Be sure you are familiar with all vehicle controls, particularly those used for braking, steering,
transmission, and transfer case operation. Learn how your vehicle handles on different road surfaces. Your driving skills will improve with experience. When
driving off-road, or operating the vehicle, don’t overload the vehicle or expect the vehicle to overcome the natural laws of physics. Always observe federal, state,
provincial and local laws wherever you drive. As with other vehicles of this type, failure to operate this vehicle correctly may result in loss of control or a collision.
See Úpage 207 for further information.
This Owner’s Manual has been prepared with the assistance of service and engineering specialists to acquaint you with the operation and maintenance of your
vehicle. It is supplemented by customer-oriented documents. Within this information, you will find a description of the services that FCA US LLC offers to its
customers as well as the details of the terms and conditions for maintaining its validity. Please take the time to read all of these publications carefully before
driving your vehicle for the first time. Following the instructions, recommendations, tips, and important warnings in this manual will help ensure safe and
enjoyable operation of your vehicle.
This Owner’s Manual describes all versions of this vehicle. Options and equipment dedicated to specific markets or versions are not expressly indicated in the
text. Therefore, you should only consider the information that is related to the trim level, engine, and version that you have purchased. Any content introduced
throughout the Owner’s Information that may or may not be applicable to your vehicle will be identified with the wording “If Equipped”. All information contained
in this publication is intended to help you use your vehicle in the best possible way. FCA US LLC aims towards a constant improvement of the vehicles produced.
For this reason, it reserves the right to make changes to the model described for technical and/or commercial reasons. For further information, contact an
authorized dealer.
When it comes to service, remember that authorized dealers know your Jeep® best, have factory-trained technicians, genuine Mopar® parts, and care about
your satisfaction.1

23_JT_OM_EN_USC_t.book Page 9

GETTING TO KNOW YOUR INSTRUMENT PANEL123
and release the OK button. To reset the oil change
indicator system (after performing the scheduled
maintenance), refer to the following procedure.
Oil Life Reset

1. Without pushing the brake pedal, place the ignition in the ON/RUN mode (do not start the
engine).

2. Navigate to "Oil Life" submenu in "Vehicle Info" in the instrument cluster display.
3. Push and hold the OK button until the gauge
resets to 100%.
Secondary Method For Oil Change Reset
Procedure

1. Without pushing the brake pedal, place the ignition in the ON/RUN position (do not start
the engine).

2. Fully press the accelerator pedal, slowly, three times within ten seconds.
3. Without pushing the brake pedal, place the ignition in the OFF position.
NOTE:If the indicator message illuminates when you start
the vehicle, the oil change indicator system did not
reset. If necessary, repeat this procedure.
OFF ROAD+ DISPLAY — IF EQUIPPED
When the Off Road+ button is pushed in the switch
bank, the Instrument Cluster Display will begin to
show messages related to the feature. Depending
on the Four Wheel Drive mode in use, the
messages will differ, and after five seconds, all
messages will clear from the display. The
messages are as follows:
2H: Off Road+ Unavailable, Shift to 4WD
4H: 4WD High Off Road+ Active
4L: 4WD Low Off Road+ Active
Adaptive Cruise Control (ACC) and Cruise Control
are not available when using Off Road+. If either
option is selected, a dedicated message will
display indicating that the features are not usable
concurrently. Messages are as follows:
4H: Cruise Control — Cruise Control Unavailable
in Off Road+
4H: Adaptive Cruise Control — Adaptive Cruise
Control (ACC) Unavailable in Off Road+
4L: Cruise Control — Cruise Control Unavailable
in 4WD Low
4L: Adaptive Cruise Control — Adaptive Cruise
Control (ACC) Unavailable in 4WD Low
NOTE:The behavior of Electronic Stability Control while in
Off Road+ varies depending on the 4WD status. If
the vehicle is in 4WD High, Traction Control is auto -
matically turned off. Also, holding the ESC OFF
button for five seconds will turn off ESC. In 4WD
Low, Electronic Stability Control automatically
shuts off regardless of the Off Road Status.
INSTRUMENT CLUSTER DISPLAY
S
ELECTABLE ITEMS
The instrument cluster display can be used to view
the following main menu items:
NOTE:Depending on the vehicles options, feature
settings may vary.
Speedometer Driver Assist —
If EquippedMessages
Vehicle Info Trip Info Screen Setup
Fuel Economy Stop/Start Audio
Off Road —
If Equipped
3

23_JT_OM_EN_USC_t.book Page 123

GETTING TO KNOW YOUR INSTRUMENT PANEL129
Your vehicle has the ability to alert you to
additional maintenance required on your vehicle or
engine. Refer to the following messages that may
be displayed on your instrument cluster display:
Exhaust Filter Nearing Full Safely Drive at
Consistent Speeds to Clear — This message will
be displayed if the exhaust particulate filter
reaches 80% of its maximum storage capacity.
Under conditions of exclusive short duration
and low speed driving cycles, your diesel engine
and exhaust after-treatment system may never
reach the conditions required to cleanse the
filter to remove the trapped PM. If this occurs,
the “Exhaust Filter XX% Full Safely Drive at
Highway Speeds to Remedy” message will be
displayed. If this message is displayed, you will
hear one chime to assist in alerting you of this
condition. By simply driving your vehicle at
highway speeds for up to 20 minutes, you can
remedy the condition in the particulate filter
system and allow your diesel engine and
exhaust after-treatment system to cleanse the
filter to remove the trapped PM and restore the
system to normal operating condition.
Exhaust System Regeneration in Process
Continue Driving — This message indicates that
the DPF is self-cleaning. Maintain your current
driving condition until regeneration is
completed.
Exhaust System — Regeneration Completed —
This message indicates that the DPF
self-cleaning is completed. If this message is
displayed, you will hear one chime to assist in
alerting you of this condition.
Exhaust System Service Required —
See Dealer — This message indicates regenera -
tion has been disabled due to a system malfunc -
tion. At this point the engine Powertrain Control
Module (PCM) will register a fault code, the
instrument panel will display a Malfunction Indi -
cator Light (MIL) light.
Exhaust Filter Full — Power Reduced
See Dealer — This message indicates the PCM
has derated the engine to limit the likelihood of
permanent damage to the after-treatment
system. If this condition is not corrected and a
dealer service is not performed, extensive
exhaust after-treatment damage can occur. To
correct this condition it will be necessary to have
your vehicle serviced by an authorized dealer.
NOTE:Failing to follow the oil change indicator, changing
your oil and resetting the oil change indicator by
0 miles (0 kilometers) remaining will prevent the
diesel exhaust filter from performing its cleaning
routine. This will shortly result in a Malfunction
Indicator Light (MIL) and reduced engine power.
Only an authorized dealer will be able to correct
this condition.
CAUTION!
See an authorized dealer, as damage to the
exhaust system could occur soon with continued
operation.CAUTION!
See an authorized dealer, as damage to the
exhaust system could occur soon with continued
operation.
3

23_JT_OM_EN_USC_t.book Page 129

GETTING TO KNOW YOUR INSTRUMENT PANEL137
Service Forward Collision Warning (FCW)
Light — If Equipped
This warning light will illuminate to
indicate a fault in the Forward Collision
Warning System. Contact an authorized
dealer for service Úpage 291.
Service Stop/Start System Warning Light —
If Equipped
This warning light will illuminate when the
Stop/Start system is not functioning
properly and service is required. Contact
an authorized dealer for service.
Sway Bar Fault Warning Light —
If Equipped
This light will illuminate when there is a
fault in the sway bar disconnect system
Úpage 166.
Tire Pressure Monitoring System (TPMS)
Warning Light
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 life and fuel consumption may not be
guaranteed. Should one or more tires be in the condition
previously mentioned, 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.
WARNING!
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.
3

23_JT_OM_EN_USC_t.book Page 137

142GETTING TO KNOW YOUR INSTRUMENT PANEL
If any of these systems require service, the OBD II
system will turn on the Malfunction Indicator Light
(MIL). It will also store diagnostic codes and other
information to assist your service technician in
making repairs. Although your vehicle will usually
be drivable and not need towing, see an authorized
dealer for service as soon as possible.
ONBOARD DIAGNOSTIC SYSTEM
(OBD II) C
YBERSECURITY
Your vehicle is required to have an OBD II and a
connection port to allow access to information
related to the performance of your emissions
controls. Authorized service technicians may need
to access this information to assist with the
diagnosis and service of your vehicle and
emissions system Ú page 214.
EMISSIONS INSPECTION AND
MAINTENANCE PROGRAMS
In some localities, it may be a legal requirement to
pass an inspection of your vehicle's emissions
control system. Failure to pass could prevent
vehicle registration. For states and/or provinces that require
an Inspection and Maintenance (I/M),
this check verifies the Malfunction
Indicator Light (MIL) is functioning and is
not on when the engine is running, and that the
OBD II system is ready for testing.
The OBD II system may not be ready if your vehicle
was recently serviced, recently had a depleted
battery or a battery replacement. If the OBD II
system should be determined not ready for the I/M
test, your vehicle may fail the test.
Your vehicle has a simple ignition actuated test,
which you can use prior to going to the test station.
To check if your vehicle's OBD II system is ready,
you must do the following:

1. Cycle the ignition switch to the ON position, but do not crank or start the engine.

NOTE:If you crank or start the engine, you will have to
start this test over.
2. As soon as you cycle the ignition switch to the ON position, you will see the Malfunction
Indicator Light (MIL) symbol come on as part of
a normal bulb check.
CAUTION!
Prolonged driving with the MIL on could cause
further damage to the emission control
system. It could also affect fuel economy and
driveability. The vehicle must be serviced
before any emissions tests can be performed.
If the MIL is flashing while the vehicle is
running, severe catalytic converter damage
and power loss will soon occur. Immediate
service is required.
WARNING!
ONLY an authorized service technician should
connect equipment to the OBD II connection
port in order to read the VIN, diagnose, or
service your vehicle.
If unauthorized equipment is connected to the
OBD II connection port, such as a
driver-behavior tracking device, it may:
Be possible that vehicle systems,
including safety related systems, could be
impaired or a loss of vehicle control could
occur that may result in an accident
involving serious injury or death.
Access, or allow others to access, infor -
mation stored in your vehicle systems,
including personal information.

23_JT_OM_EN_USC_t.book Page 142