2023 JEEP WRANGLER open hood

328SERVICING AND MAINTENANCE
(Continued)
(Continued)
Installing The Rear Wiper

1. Lift the wiper arm off of the glass.

2. Insert the wiper blade pivot pin into the opening on
the end of the wiper arm and rotate the wiper in to
place.
3. Place with wiper on the glass and close the tail gate.
EXHAUST SYSTEM
The best protection against carbon monoxide entry into
the vehicle body is a properly maintained engine exhaust
system.
If you notice a change in the sound of the exhaust system;
or if the exhaust fumes can be detected inside the vehicle;
or when the underside or rear of the vehicle is damaged;
have an authorized technician inspect the complete
exhaust system and adjacent body areas for broken,
damaged, deteriorated, or mispositioned parts. Open
seams or loose connections could permit exhaust fumes
to seep into the passenger compartment. In addition, have
the exhaust system inspected each time the vehicle is
raised for lubrication or oil change. Replace as required.
Under normal operating conditions, the catalytic converter
will not require maintenance. However, it is important to
keep the engine properly tuned to ensure proper catalyst
operation and prevent possible catalyst damage.
NOTE:Intentional tampering with emissions control systems can
result in civil penalties being assessed against you.
In unusual situations involving grossly malfunctioning
engine operation, a scorching odor may suggest severe
and abnormal catalyst overheating. If this occurs, stop the
vehicle, turn off the engine and allow it to cool. Service,
including a tune-up to manufacturer's specifications,
should be obtained immediately.
To minimize the possibility of catalytic converter damage:
Do not interrupt the ignition when the transmission is
in gear and the vehicle is in motion.
 Do not try to start the vehicle by pushing or towing the
vehicle.
 Do not idle the engine with any ignition components
disconnected or removed, such as when diagnostic
testing, or for prolonged periods during very rough idle
or malfunctioning operating conditions.
COOLING SYSTEM
WARNING!
Exhaust gases can injure or kill. They contain Carbon
Monoxide (CO), which is colorless and odorless.
Breathing it can make you unconscious and can
eventually poison you
Úpage 288.
A hot exhaust system can start a fire if you park over
materials that can burn. Such materials might be
grass or leaves coming into contact with your
exhaust system. Do not park or operate your vehicle
in areas where your exhaust system can contact
anything that can burn.
CAUTION!
The catalytic converter requires the use of unleaded
fuel only. Leaded gasoline will destroy the effective -
ness of the catalyst as an emissions control device
and may seriously reduce engine performance and
cause serious damage to the engine.
 Damage to the catalytic converter can result if your
vehicle is not kept in proper operating condition. In
the event of engine malfunction, particularly
involving engine misfire or other apparent loss of
performance, have your vehicle serviced promptly.
Continued operation of your vehicle with a severe
malfunction could cause the converter to overheat,
resulting in possible damage to the converter and
vehicle.
WARNING!
WARNING!
You or others can be badly burned by hot engine
coolant (antifreeze) or steam from your radiator. If
you see or hear steam coming from under the hood,
do not open the hood until the radiator has had time
to cool. Never open a cooling system pressure cap
when the radiator or coolant bottle is hot.
 Keep hands, tools, clothing, and jewelry away from
the radiator cooling fan when the hood is raised. The
fan starts automatically and may start at any time,
whether the engine is running or not.

23_JL_OM_EN_USC_t.book Page 328

330SERVICING AND MAINTENANCE
NOTE:
It is the owner's responsibility to maintain the proper
level of protection against freezing according to the
temperatures occurring in the area where the vehicle is
operated.
 Use care when filling under hood fluids such as engine
oil, washer fluid, antifreeze, etc., to minimize spillage
onto the top of the engine. Any excess fluid that is
spilled onto the top of the engine should be removed
using compressed air or an absorbent cloth.
 Some vehicles require special tools to add coolant
properly. Failure to fill these systems properly could
lead to severe internal engine damage. If any coolant is
needed to be added to the system, please contact an
authorized dealer.
 Mixing engine coolant types is not recommended and
can result in cooling system damage. If HOAT and OAT
coolant are mixed in an emergency, have an authorized
dealer drain, flush, and refill with OAT coolant
(conforming to MS.90032) as soon as possible.
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of engine
coolant (antifreeze), and to ensure that engine coolant will
return to the radiator from the coolant expansion bottle/
recovery tank if so equipped.
The cap should be inspected and cleaned if there is any
accumulation of foreign material on the sealing surfaces.
Disposal Of Used Coolant
Used ethylene glycol-based coolant (antifreeze) OAT or
HOAT, is a regulated substance requiring proper disposal.
Check with your local authorities to determine the disposal
rules for your community. To prevent ingestion by animals
or children, do not store ethylene glycol-based coolant in
open containers or allow it to remain in puddles on the
ground, clean up any ground spills immediately. If
ingested, seek emergency assistance immediately.
Coolant Level
The coolant bottle provides a quick visual method for
determining that the coolant level is adequate. With the
engine OFF and cold, the level of the engine coolant
(antifreeze) in the bottle should be between the ranges
indicated on the bottle. The radiator normally remains completely full, so there is
no need to remove the radiator/coolant pressure cap
unless checking for engine coolant freeze point or
replacing coolant. Advise your service attendant of this. As
long as the engine operating temperature is satisfactory,
the coolant bottle need only be checked once a month.
When additional engine coolant is needed to maintain the
proper level, only OAT coolant that meets the
requirements of the manufacturer Material Standard
MS.90032 should be added to the coolant bottle. Do not
overfill.
Engine Coolant Level — 2.0L
WARNING!

Do not open hot engine cooling system. Never add
engine coolant (antifreeze) when the engine is over -
heated. Do not loosen or remove the cap to cool an
overheated engine. Heat causes pressure to build up
in the cooling system. To prevent scalding or injury,
do not remove the pressure cap while the system is
hot or under pressure.
 Do not use a pressure cap other than the one speci -
fied for your vehicle. Personal injury or engine
damage may result.
WARNING!
 Do not open hot engine cooling system. Never add
engine coolant (antifreeze) when the engine is over -
heated. Do not loosen or remove the cap to cool an
overheated engine. Heat causes pressure to build up
in the cooling system. To prevent scalding or injury,
do not remove the pressure cap while the system is
hot or under pressure.
 Do not use a pressure cap other than the one speci -
fied for your vehicle. Personal injury or engine
damage may result.

23_JL_OM_EN_USC_t.book Page 330

SERVICING AND MAINTENANCE343
Bulb Replacement
NOTE:Lens fogging can occur under certain atmospheric condi -
tions. This will usually clear as atmospheric conditions
change to allow the condensation to change back into a
vapor. Turning the lamps on will usually accelerate the
clearing process.
HALOGEN HEADLAMPS
See the following steps to replace:

1. Open hood and support using prop rod.

2. Remove the front grille. Turn the retainers along the top a quarter turn counterclockwise and remove. 3. Pull the bottom of the grille away starting at one side
and working toward the other.
4. Remove the three screws holding the headlamp to the vehicle.
5. Remove lamp from the vehicle.
6. Remove the lamp from the collar.
7. Grab the bulb and rotate a quarter turn counter -
clockwise.
8. Pull the bulb from the housing.
9. Push connector locking tab to the unlock position.
10. Remove connector from bulb.
11. Push connector onto new bulb base, and push the connector locking tab to the lock position. 12. Reinstall bulb housing. Rotate the bulb a quarter turn
clockwise.
Premium Fog Lamps
LED
Rear Premium LED Tail Lamps LED
Rear Base Tail Lamp Stop/Tail/Turn Bulb 3157
Rear Base Tail Lamp Backup Bulb 7440
Rear Base Tail Lamp Side Marker LED
Center High Mounted Stop Lamp (CHMSL) LED
License Lamp LED
NOTE: Numbers refer to commercial bulb types that can be purchased from an authorized dealer. If a bulb needs to be replaced, visit an authorized dealer or refer to the applicable Service
Manual.
Exterior Bulbs
Bulb Name Bulb Number
CAUTION!
Do not touch the new bulb with your fingers. Oil
contamination will severely shorten bulb life. If the bulb
comes in contact with any oily surface, clean the bulb
with rubbing alcohol.
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385
Four Wheel Drive Operation ........................................ 142
Four-Way Hazard Flasher ............................................ 291
Freedom Panels .............................................................. 86
Freeing A Stuck Vehicle ............................................... 302
Front Axle (Differential) ................................................ 332
Fuel ...................................................................... 369
, 371
Adding............................................................. 165, 166
Additives .................................................................. 369
Clean Air .................................................................. 369
Ethanol .................................................................... 370
Filler Cap (Gas Cap) ................................................ 165
Filter......................................................................... 321
Gasoline .................................................................. 369
Materials Added...................................................... 369
Methanol ................................................................. 370
Octane Rating ................................................ 369
, 374
Requirements ................................................ 371, 373
Specifications................................................. 371, 374
Tank Capacity.......................................................... 373
Fueling ................................................................. 165
, 166
Fuses ............................................................................ 333
GGarage Door Opener (HomeLink) ..................................47
Gas Cap (Fuel Filler Cap) .................................... 165, 166
Gasoline, (Fuel) ............................................................ 369
Gasoline, Clean Air ....................................................... 369
Gasoline, Reformulated............................................... 369
Gauges Voltage..................................................................... 130
Gear Ranges ........................................................ 135
, 138
Getting Started ............................................................. 227 Glass Cleaning .............................................................. 367
Gross Vehicle Weight Rating .............................. 170
, 171
GVWR.............................................................................169
HHalf-Door Installation ..................................................... 31 Half-Door Installation — If Equipped
S
...................... 31
Hard Top .......................................................................... 66 Hard Top Front Panel(s) Removal

S
.......................... 83
Hazard Warning Flashers ............................................. 291
Head Restraints .............................................................. 41
Headlights Automatic ................................................................... 51
Bulb Replacement...................................................343
Cleaning ...................................................................361High Beam/Low Beam Select Switch ...................... 51
Lights On Reminder................................................... 51
Passing....................................................................... 51
Replacing ................................................................. 343
Heated Mirrors ................................................................ 46
Heated Seats .................................................................. 41
Heated Steering Wheel .................................................. 37
High Beam/Low Beam Select (Dimmer) Switch ........... 51
Hill Descent Control ...................................................... 248
Hill Descent Control Indicator ...................................... 248
Hill Start Assist .............................................................. 249
Hitches Trailer Towing .......................................................... 172
HomeLink (Garage Door Opener) .................................. 47
Hood Prop .....................................................................100
Hood Release................................................................ 100
IIgnition ............................................................................ 15 Switch ........................................................................ 15
In Case Of Emergency .................................................. 291
Inside Rearview Mirror ................................................... 45
Instrument Cluster ....................................................... 104 Descriptions ............................................................ 123
Display ..................................................................... 108Engine Oil Reset ...................................................... 110
Menu Items ............................................................. 112
Instrument Cluster

S
................................................ 108
Instrument Panel Lens Cleaning ................................. 367
Integrated Power Module (Fuses) ............................... 334
Interior And Instrument Lights....................................... 52
Interior Appearance Care............................................. 362
Interior Lights.................................................................. 52
Intermittent Wipers (Delay Wipers) ............................... 53
Intervention Regeneration Strategy ............................ 323
Introduction .................................................................. 226
Inverter Power ......................................................................... 63
JJack Location ................................................................ 294
Jack Operation.............................................................. 295
Jacking And Tire Changing

S
................................... 293
Jacking Instructions ..................................................... 295
Jump Starting ............................................................... 298
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389
Signals, Turn...............................................123, 290, 344
Sirius Satellite Radio ................................................... 203 Favorites.................................................................. 206
Replay ...................................................................... 205
SiriusXM Satellite Radio Browse in SXM ........................................................ 206Favorites.................................................................. 206
Replay ...................................................................... 205
Smart Watch................................................................. 236
Snow Chains (Tire Chains)........................................... 357
Snow Tires .................................................................... 355
Soft Top .................................................................... 66
, 74
Soft Top Windows ...........................................................74
SOS Call ............................................................... 228
, 237
Spare Tires .................................................295, 355, 356
Specifications Fuel (Gasoline) ........................................................ 374Oil ............................................................................. 374
Speed Control Accel/Decel ............................................................. 152
Accel/Decel (ACC Only)........................................... 155Cancel ...................................................................... 152Resume ................................................................... 152
Speed Control (Cruise Control) ................................... 152
Starting ................................................................ 126
, 129
Automatic Transmission................................ 126, 129
Button .........................................................................15
Cold Weather .......................................................... 128
Engine Block Heater ............................................... 129
Engine Fails To Start............................................... 128
Manual Transmission ............................................. 126
Remote ....................................................................... 17
Starting And Operating ................................................ 126
Starting Procedures ............................................ 126
, 129 Starting Procedures (Diesel Engines)..........................129
Steering ........................................................................... 36
Power ....................................................................... 146
Tilt Column ................................................................. 36
Wheel, Heated ........................................................... 37
Wheel, Tilt .................................................................. 36
Steering Wheel Audio Controls ....................................201
Steering Wheel Mounted Sound System .................... 201
Stolen Vehicle Assistance .................................. 234
, 238
Stop/Start ........................................................... 147, 149
Storage .............................................................. 60, 74, 93
Behind the Seat ......................................................... 61
Storage, Vehicle ............................................................359
Store Radio Presets ...................................................... 207
Storing Your Vehicle ..................................................... 359
Stuck, Freeing ............................................................... 302
Sun Roof .......................................................................... 91 Sunrider® For Hard Top ................................................. 89
Sway Bar Disconnect Electronic ................................................................. 145
Sway Control, Trailer..................................................... 251
Swing Gate, Rear .......................................................... 101
Synthetic Engine Oil ...................................................... 318
System, Remote Starting ............................................... 17
TTelescoping Steering Column ........................................ 36
Temperature Control, Automatic (ATC) ......................... 59 Tie Down Hooks, Cargo ................................................ 102
Tilt Steering Column ....................................................... 36
Tire And Loading Information Placard ......................... 349
Tire Markings ................................................................ 345
Tire Safety Information................................................. 345 Tires ................................................... 290
, 352, 355, 358
Aging (Life Of Tires) ................................................. 354 Air Pressure ............................................................. 352
Chains ...................................................................... 357Changing.................................................................. 293
Compact Spare........................................................ 355General Information.......................................352
, 355
High Speed .............................................................. 353 Inflation Pressure .................................................... 352
Life Of Tires ............................................................. 354
Load Capacity .......................................................... 349
Pressure Monitoring System (TPMS) ............ 121
, 257
Quality Grading........................................................ 358 Radial ....................................................................... 353
Replacement ........................................................... 354
Rotation ................................................................... 358
Safety .............................................................. 345
, 352
Sizes......................................................................... 346
Snow Tires ............................................................... 355 Spare Tires ........................................... 295
, 355, 356
Spinning ................................................................... 353
Tread Wear Indicators ............................................ 354
Wheel Nut Torque ................................................... 368
To Open Hood ............................................................... 100
Tongue Weight/Trailer Weight..................................... 173
Top Dual............................................................................ 66
Hard ........................................................................... 66
Power Sliding ............................................................. 91
Removable................................................................. 66
Soft............................................................................. 66
Tow Hooks Emergency ............................................................... 304
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