2020 JEEP WRANGLER UNLIMITED maintenance

SERVICING AND MAINTENANCE
240
(Continued)
Dark Vapor Chrome, Black Satin Chrome, or
Low Gloss Clear Coat WheelsTire Chains And Traction Devices
Use of traction devices require sufficient
tire-to-body clearance. Follow these recom-
mendations to guard against damage.
the tire, as recommended by the traction
device manufacturer.
Install on rear tires only. 

All OE equipped tire and wheel sizes are

chainable with an Autosock traction
device. See Autosock.com for the recom -
mended part or model number for your OE
equipped tire size.
permitted with the use of 245/75R17
tires on size 17 x 7.5 ET44.45 wheels.
CAUTION!
If your vehicle is equipped with these
specialty wheels, DO NOT USE wheel
cleaners, abrasives, or polishing
compounds. They will permanently
damage this finish and such damage is not
covered by the New Vehicle Limited
Warranty. HAND WASH ONLY USING
MILD SOAP AND WATER WITH A SOFT
CLOTH. Used on a regular basis; this is all
that is required to maintain this finish.
WARNING!
Using tires of different size and type
(M+S, Snow) between front and rear axles
can cause unpredictable handling. You
could lose control and have a collision.
CAUTION!
To avoid damage to your vehicle or tires,
observe the following precautions:
Because of restricted traction device
clearance between tires and other
suspension components, it is important
that only traction devices in good condi -
tion are used. Broken devices can cause
serious damage. Stop the vehicle imme-
diately if noise occurs that could indi -
cate device breakage. Remove the
damaged parts of the device before
further use.
Install device as tightly as possible and
then retighten after driving about ½ mile
(0.8 km). Autosock traction devices do
not require retightening.
Do not exceed 30 mph (48 km/h).
Drive cautiously and avoid severe turns
and large bumps, especially with a
loaded vehicle.
Do not drive for a prolonged period on
dry pavement.
2020_JEEP_JL_WRANGLER_UG_RHD_UK.book Page 240 
The use of S-class snow chains is 
Traction device must be of proper size for

241
Tire Rotation Recommendations
The tires on the front and rear of your vehicle
operate at different loads and perform
different steering, handling, and braking
functions. For these reasons, they wear at
unequal rates.
These effects can be reduced by timely rota-
tion of tires. The benefits of rotation are
especially worthwhile with aggressive tread
designs such as those on On/Off Road type
tires. Rotation will increase tread life, help to
maintain mud, snow, and wet traction levels,
and contribute to a smooth, quiet ride. Refer to the “Maintenance Plan” for the
proper maintenance intervals. The reasons
for any rapid or unusual wear should be
corrected prior to rotation being performed.
The suggested rotation method is the “rear
-
ward-cross” shown in the following diagram.
Tire Rotation (Rearward Cross)
STORING THE VEHICLE

Observe the traction device manufacturer’s
instructions on the method of installation,
operating speed, and conditions for use.
Always use the suggested operating speed
of the device manufacturer’s if it is less
than 30 mph (48 km/h).

Do not use traction devices on a compact
spare tire.
CAUTION! (Continued)
CAUTION!
Proper operation of four-wheel drive
vehicles depends on tires of equal size,
type and circumference on each wheel.
Any difference in tire size can cause
damage to the transfer case. Tire rotation
schedule should be followed to balance
tire wear.
WARNING!
Take care to avoid the radiator cooling
fan whenever the hood is raised. It can
start anytime the ignition switch is ON.
You can be injured by moving fan blades.
Remove any metal jewelry such as rings,
watch bands and bracelets that could
make an inadvertent electrical contact.
You could be seriously injured.
Vehicles with the Stop/Start system will
be equipped with two batteries. Both the
main and the supplemental batteries
must be disconnected to completely
de-energize the 12 Volt electrical
system.
Serious injury or death could result if you
do not disconnect both batteries. To
learn how to properly disconnect, see
your authorized dealer.
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SERVICING AND MAINTENANCE
242
If you are storing your vehicle for more than
21 days, we recommend that you take the
following steps to minimize the drain on your
vehicle's battery:
Disconnect the negative cable from
battery.
If your vehicle is equipped with Stop/Start
system then disconnect both the main and
supplemental negative battery cables.
Any time you store your vehicle or keep it
out of service (i.e., vacation) for two weeks
or more, run the air conditioning system at
idle for about five minutes in the fresh air
and high blower setting. This will ensure
adequate system lubrication to minimize
the possibility of compressor damage
when the system is started again.
If assistance is needed to disconnect the
battery system, see your authorized dealer.Battery Cable Disconnect
NOTE:
You must isolate the supplemental battery
connection point, as well as the main
battery terminal from the post, as shown in
the image, to fully de-energize both
batteries for storage. If assistance is
needed to disconnect the battery system,
see an authorized dealer.
Do not disconnect the Intelligent Battery
Sensor (IBS), or your Stop/Start system
may not function for up to 24 hours, due
to the IBS being set into learn mode.
BODYWORK
Body And Underbody Maintenance
Cleaning Headlights
Your vehicle is equipped with plastic head -
lights and fog lights that are lighter and less
susceptible to stone breakage than glass
headlights.
Plastic is not as scratch resistant as glass
and therefore different lens cleaning proce -
dures must be followed.
To minimize the possibility of scratching the
lenses and reducing light output, avoid
wiping with a dry cloth. To remove road dirt,
wash with a mild soap solution followed by
rinsing.
Do not use abrasive cleaning components,
solvents, steel wool or other aggressive mate -
rial to clean the lenses.
CAUTION!
If the negative battery cables are not
isolated properly it can cause a potential
power spike or surge in the system,
resulting in damage to essential electrical
components.
1 — Supplemental Negative Battery Cable
2 — Main Negative Battery Cable
3 — Intelligent Battery Sensor (IBS)
4 — Main Negative Battery Terminal
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SERVICING AND MAINTENANCE
244(Continued)
(Continued)
Appearance Care For Fabric Top Models

To maintain the appearance of your vehicle's inte
-
rior trim and top, follow these precautions:

Avoid leaving your vehicle unattended
with the top down, as exposure to sun or
rain may damage interior trim.
Do not use harsh cleaners or bleaching
agents on top material, as damage may
result.
Do not allow any vinyl cleaner to run down
and dry on the paint, leaving a streak.
After cleaning your vehicle's fabric top,
always make sure it is completely dry
before lowering.
Be especially careful when washing the
windows by following the directions for
“Care of Fabric Top Windows.”
Washing – Use mild soap suds, lukewarm
water, and a brush with soft bristles. If extra
cleaning is required, use a mild foaming
cleaner on the entire top, but support the top
from underneath.
Rinsing – Be sure to remove all traces of
cleaner by rinsing the top thoroughly with
clean water. Remember to allow the top to
dry before lowering it. Some parts of the vehicle may be painted
with a matte paintwork which requires
special care for its preservation.
CAUTION!
Failure to follow these cautions may cause
interior and exterior vehicle water damage,
stains or mildew on the top material or
electrical components damage:
Avoid high-pressure car washes for the
exterior and interior of the vehicle, as
they can damage the top material and
electrical connectors. Also, increased
water pressure may force past the
weather strips.
It is recommended that the top be free of
water prior to opening it. Operating the
top, opening a door or lowering a window
while the top is wet may allow water to
drip into the vehicle’s interior.
Use care when washing the vehicle,
water pressure directed at the weather
strip seals may cause water to leak into
the vehicle’s interior.
Careless handling and storage of the
removable roof panels may damage the
seals, causing water to leak into the
vehicle’s interior.
The front panel(s) must be positioned
properly to ensure sealing. Improper
installation can cause water to leak into
the vehicle’s interior.
CAUTION!
Avoid washing with rollers and/or
brushes in washing stations. Wash the
vehicle only by hand using neutral pH
detergents; dry it with a wet chamois
leather. Abrasive products and/or
polishes should not be used for cleaning
the car. Bird droppings must be washed
off immediately and thoroughly as the
acid they contain is particularly aggres-
sive.
Avoid (if at all possible) parking the
vehicle under trees; remove vegetable
resins immediately as, when dried, it
may only be possible to remove them
with abrasive products and/or polishes,
which is highly inadvisable as they could
alter the typical opaqueness of the paint.
CAUTION! (Continued)
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245
Care Of Fabric Top Windows
Your vehicle's fabric top has pliable plastic
windows which can be scratched unless
special care is taken by following these
directions:
Never use a dry cloth to remove dust.
Instead, use a microfiber towel or soft
cotton cloth moistened with cold or warm,
clean water, and wipe across the window,
not up and down. It removes fine scratches
to improve visibility and provides UV
protection to help prevent yellowing.
When washing, never use hot water or
anything stronger than a mild soap. Never
use solvents such as alcohol or harsh
cleaning agents.
Always rinse thoroughly with cold water,
then wipe with a soft and slightly moist,
clean cloth.
When removing frost, snow or ice, never
use a scraper or de-icing chemicals. Use
warm water only if you must clean the
window quickly.
Debris (sand, mud/dirt, dust, or salt) from
off-road driving will have an impact on
plastic retainer operation. Even normal
on-road driving and vehicle washing will
eventually impact window plastic retainer
operation. To maintain ease of use of the
window plastic retainers, each window
plastic retainer should be cleaned and
lubricated regularly. Clean them with a
mild soap solution and a small brush.
Cleaning products are available through
an authorized dealer.
Never paste stickers, gummed labels or
any tape to the windows. Adhesives are
hard to remove and may damage the
windows.
INTERIORS
Seats And Fabric Parts
Use a specific product to clean fabric uphol -
stery and carpeting.
Seat Belt Maintenance
Do not bleach, dye or clean the belts with
chemical solvents or abrasive cleaners. This
will weaken the fabric. Sun damage can also
weaken the fabric.
If the belts need cleaning, use a mild soap
solution or lukewarm water. Do not remove
the belts from the vehicle to wash them. Dry
with a soft cloth.
Replace the belts if they appear frayed or
worn or if the buckles do not work properly.
Do not use pure windshield washer fluid
for cleaning the front windshield and
rear window; dilute it min. 50% with
water. Only use pure windshield washer
fluid when strictly necessary due to
outside temperature conditions.
CAUTION! (Continued)
WARNING!
Do not use volatile solvents for cleaning
purposes. Many are potentially flammable,
and if used in closed areas they may cause
respiratory harm.
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SERVICING AND MAINTENANCE
246
Plastic And Coated Parts
Use a specific product to clean vinyl uphol-
stery.
Cleaning Plastic Instrument Cluster Lenses
The lenses in front of the instruments in this
vehicle are molded in clear plastic. When
cleaning the lenses, care must be taken to
avoid scratching the plastic.
1. Clean with a wet soft cloth. A mild soap solution may be used, but do not use
high alcohol content or abrasive
cleaners. If soap is used, wipe clean with
a clean damp cloth.
2. Dry with a soft cloth.
Leather Parts
Your leather upholstery can be best
preserved by regular cleaning with a damp
soft cloth. Small particles of dirt can act as
an abrasive and damage the leather uphol -
stery and should be removed promptly with a
damp cloth. Care should be taken to avoid
soaking your leather upholstery with any
liquid. Please do not use polishes, oils,
cleaning fluids, solvents, detergents, or
ammonia-based cleaners to clean your
leather upholstery. Application of a leather
conditioner is not required to maintain the
original condition. NOTE:
If equipped with light colored leather, it
tends to show any foreign material, dirt, and
fabric dye transfer more so than darker
colors. The leather is designed for easy
cleaning.
Glass Surfaces
All glass surfaces should be cleaned on a
regular basis with any commercial house
-
hold-type glass cleaner. Never use an abra -
sive type cleaner. Use caution when cleaning
the inside rear window equipped with elec -
tric defrosters or windows equipped with
radio antennas. Do not use scrapers or other
sharp instruments that may scratch the
elements.
When cleaning the rear view mirror, spray
cleaner on the towel or cloth that you are
using. Do not spray cleaner directly on the
mirror.
WARNING!
A frayed or torn belt could rip apart in a
collision and leave you with no protection.
Inspect the belt system periodically,
checking for cuts, frays, or loose parts.
Damaged parts must be replaced
immediately. Do not disassemble or modify
the system. Seat belt assemblies must be
replaced after a collision if they have been
damaged (i.e., bent retractor, torn
webbing, etc.).
CAUTION!

Direct contact of air fresheners, insect
repellents, suntan lotions, or hand sani -
tizers to the plastic, painted, or decorated
surfaces of the interior may cause perma -
nent damage. Wipe away immediately.

Damage caused by these type of prod -
ucts may not be covered by your New
Vehicle Limited Warranty.
CAUTION!
Do not use Alcohol and Alcohol-based and/
or Ketone based cleaning products to
clean leather upholstery, as damage to the
upholstery may result.
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319
INDEX
A
Accessories ....................................... 258Mopar ........................................... 258
Active Speed Limiter .......................... 156
Adaptive Cruise Control (ACC)
(Cruise Control) ................................. 158
Adding Fuel ...................................... 169
Additives, Fuel .................................. 249
Air Bag Air Bag Operation ........................... 107Air Bag Warning Light ..................... 105
Disable, Passenger Air Bag.............. 107

Enhanced Accident Response ... 115 , 209

Event Data Recorder (EDR) ............. 209
Front Air Bag ................................. 106
If Deployment Occurs ..................... 114
Knee Impact Bolsters ..................... 112
Maintaining Your Air Bag System ..... 116
Maintenance .................................. 116
Redundant Air Bag Warning Light .... 105
Transporting Pets ........................... 134
Air Bag Light ........................65 , 105 , 136
Air Conditioning................................... 44
Air Conditioning Filter .......................... 46
Air Conditioning System ....................... 44
Air Conditioning, Operating Tips ............ 45 Air Pressure
Tires ............................................. 233
Alarm Arm The System .............................. 15
Disarm The System .......................... 15
Security Alarm ............................15 , 68
Alarm (Security Alarm) ......................... 16
Alterations/Modifications Vehicle ............................................. 2
Android Auto...................... 266 , 271 , 302
Apps ............................................. 274
Communication ............................. 273
Maps ............................................ 272
Music ........................................... 273
Antifreeze (Engine Coolant) ................ 253
Anti-Lock Brake System (ABS) .............. 78
Anti-Lock Warning Light ....................... 68
Apple CarPlay .................... 267 , 274 , 303
Apps ............................................. 276
Maps ............................................ 276
Messages ...................................... 275
Music ........................................... 275
Phone ........................................... 275
Assist, Hill Start .................................. 85
Audio Systems (Radio) ................260 , 262
Auto Down Power Windows ................... 46
Automatic Headlights .......................... 33 Automatic High Beams .........................33
Automatic Temperature Control (ATC) ....44
Automatic Transmission......................145
Fluid Level Check ................... 231 , 232
Fluid Type ............................. 231 , 257
Special Additives ............................231

Auxiliary Electrical Outlet (Power Outlet)... 56

Auxiliary Power Outlet ..........................56
Auxiliary Switches ................................58
Axle Fluid..........................................257
Axle Lock ..........................................151
B
Battery ........................................ 66 , 225
Charging System Light ......................66
Belts, Seat ........................................136
Blind Spot Monitoring ..........................87
Brake Assist System .............................79
Brake Control System ...........................79
Brake Fluid ............................... 230 , 257
Brake System ....................................230 Fluid Check ...................................230
Master Cylinder ..............................230
Warning Light...................................65
Brake/Transmission Interlock...............144
Bulb Replacement ..................... 179 , 181
Bulbs, Light .............................. 137 , 179
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323
Loading Vehicle ................................. 174
LockingAxle .............................................. 151
Locks Child Protection ............................... 20
Low Tire Pressure System ..................... 92
Lowering ............................................. 47
Lowering Four Door .............................. 47
Lowering The Top ................................ 47
Lowering Two Door ............................... 47
Lug Nuts/Bolts .................................. 247
Luggage Carrier ................................... 58
M
Maintenance ....................................... 53
Maintenance Free Battery ................... 225
Maintenance Schedule ............... 210 , 216
Malfunction Indicator
Light (Check Engine)............................ 69
Manual Park Release.................................. 204
Modifications/Alterations Vehicle .............................................. 2
Monitor, Tire Pressure System ............... 92
Mopar Accessories ............................. 258
N
Navigation ........................................ 282
New Vehicle Break-In Period ............... 143 O
Occupant Restraints ............................ 97
Octane Rating, Gasoline
(Fuel) ................................ 248
, 249 , 254
Off Road Pages ................................. 277 Accessory Gauges .......................... 279
Drivetrain ...................................... 278
Pitch And Roll ............................... 279
Status Bar ..................................... 278
Oil Pressure Light ................................ 67
Oil, Engine ....................................... 254 Capacity........................................ 253
Dipstick ........................................ 224
Filter ............................................ 254
Pressure Warning Light..................... 67Recommendation ........................... 253
Viscosity ....................................... 253
Onboard Diagnostic System .................. 77
Operating Precautions .......................... 77
Overheating, Engine........................... 204
P
Paddle Shifters ................................. 145
ParkSense System, Rear .................... 161
Passenger Airbag Disable ................... 107
Passive Entry ...................................... 18
Personalized Main Menu .................... 264
Pets ................................................. 134
Phone (Uconnect).............................. 285 Pairing .......................................... 287 Phonebook ........................................291
Power
Inverter............................................57Windows ..........................................46
Power Sliding Top ................................53 Operation.........................................53
Pinch Protect ...................................53
Power Steering Fluid ..........................257
Pregnant Women And Seat Belts .........104
Preparation For Jacking ......................194
Pretensioners Seat Belts ......................................104
R
Radial Ply Tires..................................234
Radio ................................................268 Presets .................................. 262 , 265
Radio Operation ................. 261 , 263 , 270
Radio Screens ........................... 263 , 268
Raising ...............................................47
Raising Four Door ................................47
Raising The Soft Top ............................47
Raising Two Door .................................47
Rear Camera......................................167
Rear Cross Path ...................................88
Rear ParkSense System ......................161
Rear Swing Gate ..................................55
Rear Wiper/Washer ...............................36
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