tires JEEP WRANGLER 2010 JK / 3.G Owners Manual

WARNING! (Continued)
Failure to properly follow floor mat installation or
mounting can cause interference with the brake
pedal and accelerator pedal operation causing loss of
control of the vehicle.
Periodic Safety Checks You Should Make Outside
the Vehicle
Tires
Examine tires for excessive tread wear and uneven wear
patterns. Check for stones, nails, glass, or other objects
lodged in the tread. Inspect the tread and sidewall for
cuts and cracks. Check the wheel nuts for tightness.
Check the tires (including spare) for proper pressure.
Lights
Have someone observe the operation of exterior lights
while you work the controls. Check turn signal and high
beam indicator lights on the instrument panel.
Door Latches
Check for positive closing, latching, and locking.
Fluid Leaks
Check area under vehicle after overnight parking for fuel,
engine coolant, oil, or other fluid leaks. Also, if gasoline
fumes are detected or if fuel, power steering fluid, or
brake fluid leaks are suspected, the cause should be
located and corrected immediately.
2
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 79

FREEDOM TOP™ THREE-PIECE MODULAR
HARD TOP — IF EQUIPPED
CAUTION!
•The hard top is not designed to carry any addi-
tional loads such as roof racks, spare tires, build-
ing, hunting, or camping supplies, and/or luggage,
etc. Also, it was not designed as a structural
member of the vehicle, and thus cannot properly
carry any additional loads other than environmen-
tal (rain, snow, etc.).
•Do not move your vehicle until the top has been
either fully attached to the windshield frame and
bodyside, or fully removed.
CAUTION!
Failure to follow these cautions may cause interior
water damage, stains or mildew:
•It is recommended that the top be free of water
prior to panel removal. Removing the top, opening
a door or lowering a window while the top is wet
may allow water to drip into the vehicles interior.
•The hard top assembly must be positioned prop-
erly to ensure sealing. Improper installation can
cause water to leak into the vehicles interior.
•Careless handling and storage of the removable
roof panels may damage the seals, causing water to
leak into the vehicles interior.
•The front panel(s) must be positioned properly to
ensure sealing. Improper installation can cause
water to leak into the vehicles interior.
160 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

SOFT TOP — TWO DOOR MODELS
Please visit the owners section of Jeep.com for instruc-
tional videos.
CAUTION!
The soft top is not designed to carry any additional
loads such as roof racks, spare tires, building, hunt-
ing, or camping supplies, and/or luggage, etc. Also, it
was not designed as a structural member of the
vehicle and, thus, cannot properly carry any addi-
tional loads other than environmental (rain, snow,
etc.).
If the temperature is below 72°F (24°C) and/or the top
has been folded down for a period of time, the top will
appear to have shrunk when you raise it, making it
difficult to put up. This is caused by a natural contraction
of the vinyl coating on the fabric top. Place the vehicle in a warm area. Pull steadily on the top
fabric. The vinyl will stretch back to its original size and
the top can then be installed.
If the temperature is 41°F
(5°C) or below, do not attempt to put the top down or
roll the rear or side curtains.CAUTION!
•Do not run a fabric top through an automatic car
wash. Window scratches and wax build up may
result.
•Do not lower the top when the temperature is
below 41°F (5°C). Damage to the top may result.
•Do not move your vehicle until the top has been
either fully attached to the windshield frame, or
fully lowered.
•Do not lower the top with the windows installed.
Window and top damage may occur.
(Continued)
180 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

CAUTION!
The soft top is not designed to carry any additional
loads such as roof racks, spare tires, building, hunt-
ing, or camping supplies, and/or luggage, etc. Also, it
was not designed as a structural member of the
vehicle, and thus cannot properly carry any addi-
tional loads other than environmental (rain, snow,
etc.).
If the temperature is below 72°F (24°C) and/or the top
has been folded down for a period of time, the top will
appear to have shrunk when you raise it, making it
difficult to put up. This is caused by a natural contraction
of the vinyl coating on the fabric top.
Place the vehicle in a warm area. Pull steadily on the top
fabric. The vinyl will stretch back to its original size and the top can then be snapped into place.
If the tempera-
ture is 41°F (5°C) or below, do not attempt to put the top
down or roll the rear or side curtains.
CAUTION!
•Do not run a fabric top through an automatic car
wash. Window scratches and wax buildup may
result.
•Do not lower the top when the temperature is
below 41°F (5°C). Damage to the top may result.
•Do not lower the top when the windows are dirty.
Grit may scratch the window.
•Do not move your vehicle until the top has been
either fully attached to the windshield frame, or
fully lowered.
•Do not lower the top with the windows installed.
Window and top damage may occur.
(Continued)
204 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

21. Odometer / Trip Odometer / ECO (Fuel Saver
Indicator) Button
Press this button to change the display from odometer to
either of the two trip odometer settings or the “ECO”
display. Trip A or Trip B will appear when in the trip
odometer mode. Press and hold the button for two
seconds to reset the trip odometer to 0 miles or kilome-
ters. The odometer must be in trip mode to reset.
22. Shift Lever Indicator
The Shift Lever Indicator is self-contained within the
instrument cluster. It displays the gear position of the
automatic transmission.
23. Tire Pressure Monitoring Telltale LightEach 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 Tire Pressure Monitoring System
(TPMS) that illuminates a low tire pressure telltale when
one or more of your tires is significantly under-inflated.
Accordingly, when the low tire pressure telltale illumi-
nates, you should stop and check your tires as soon as
possible, and inflate them to the proper pressure. Driving
on a significantly under-inflated tire causes the tire to
overheat and can lead to tire failure. Under-inflation 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
252 UNDERSTANDING YOUR INSTRUMENT PANEL

maintain correct tire pressure, even if under-inflation 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 subse-
quent vehicle start-ups as long as the malfunction exists.
When the malfunction indicator is illuminated, the sys-
tem 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 moretires or wheels on your vehicle, to ensure that the
replacement or alternate tires and wheels allow the TPMS
to continue to function properly.
CAUTION!
The TPMS has been optimized for the original
equipment tires and wheels. TPMS pressures and
warning have been established for the tire size
equipped on your vehicle. Undesirable system opera-
tion or sensor damage may result when using re-
placement equipment that is not of the same size,
type, and/or style. Aftermarket wheels can cause
sensor damage. Do not use tire sealant from a can, or
balance beads if your vehicle is equipped with a
TPMS, as damage to the sensors may result.
4
UNDERSTANDING YOUR INSTRUMENT PANEL 253

Anti-Lock Brake System ................. 371
 Electronic Brake Control System ........... 373
▫ Anti-Lock Brake System (ABS) ........... 373
▫ Traction Control System (TCS) ........... 374
▫ Brake Assist System (BAS) .............. 374
▫ Hill Start Assist (HSA) ................ 375
▫ Electronic Roll Mitigation (ERM) ......... 378
▫ Electronic Stability Program (ESP) ........ 379
▫ ESP/BAS Warning Light ............... 385
▫ Trailer Sway Control (TSC) ............. 386
 Tire Safety Information ................. 387
▫ Tire Markings ....................... 387
▫ Tire Identification Number (TIN) ......... 391▫
Tire Terminology And Definitions ......... 392
▫ Tire Loading And Tire Pressure .......... 393
 Tires — General Information ............. 397
▫ Tire Pressure ....................... 397
▫ Tire Inflation Pressures ................ 398
▫ Tire Pressures For High-Speed Operation . . . 400
▫ Radial-Ply Tires ..................... 401
▫ Tire Spinning ....................... 401
▫ Tread Wear Indicators ................. 402
▫ Life Of Tire ........................ 402
▫ Replacement Tires .................... 403
 Tire Rotation Recommendations ........... 404
 Tire Pressure Monitor System (TPMS) ....... 406
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STARTING AND OPERATING 329

NOTE:Do not attempt to shift when only the front or
rear wheels are spinning. The transfer case is not
equipped with a synchronizer, and the front and rear
driveshaft speeds must be equal for a shift to take place.
Shifting while only the front or rear wheels are spinning
can cause damage to the transfer case.
When operating your vehicle in 4L, the engine speed will
be approximately three times (four times for Rubicon
models) that of the 2H or 4H positions at a given road
speed. Take care not to overspeed the engine.
Proper operation of four-wheel drive vehicles depends
on tires of equal size, type, and circumference on each
wheel. Any difference will adversely affect shifting and
cause damage to the transfer case.
Because four-wheel drive provides improved traction,
there is a tendency to exceed safe turning and stopping
speeds. Do not go faster than road conditions permit.WARNING!
You or others could be injured if you leave the
vehicle unattended with the transfer case in the N
(Neutral) position without first fully engaging the
parking brake. The transfer case N (Neutral) position
disengages both the front and rear driveshaft from
the powertrain, and will allow the vehicle to move
regardless of the transmission position. The parking
brake should always be applied when the driver is
not in the vehicle.
Shift Positions
For additional information on the appropriate use of each
transfer case mode position, see the information below:
2H Position
This range is used for normal street and highway driving
on hard-surfaced roads.
5
STARTING AND OPERATING 347

is needed. Vehicle speeds in excess of 25 mph (40 km/h)
should be avoided when in 4L (Low) range.
Simultaneous Brake and Throttle Operation
Many off-road driving conditions require the simulta-
neous use of the brake and throttle (two-footed driving).
When climbing rocks, logs, or other stepped objects,
using light brake pressure with light throttle will keep the
vehicle from jerking or lurching. This technique is also
used when you need to stop and restart a vehicle on a
steep incline.
Driving In Snow, Mud and Sand
Snow
In heavy snow or for additional control and traction at
slower speeds, shift the transmission into a low gear and
the transfer case into 4L (Low) if necessary. Do not shift to
a lower gear than necessary to maintain headway. Over-
revving the engine can spin the wheels and traction will
be lost. If you start to slow to a stop, try turning yoursteering wheel no more than a 1/4 turn quickly back and
forth, while still applying throttle. This will allow the tires
to get a fresh
biteand help maintain your momentum.
CAUTION!
On icy or slippery roads, do not downshift at high
engine RPM or vehicle speeds, because engine brak-
ing may cause skidding and loss of control.
Mud
Deep mud creates a great deal of suction around the tires
and is very difficult to get through. You should use
second gear (manual transmission), or DRIVE (automatic
transmission), with the transfer case in the 4L (Low)
position to maintain your momentum. If you start to slow
to a stop, try turning your steering wheel no more than a
1/4 turn quickly back and forth for additional traction.
Mud holes pose an increased threat of vehicle damage
and getting stuck. They are normally full of debris from
5
STARTING AND OPERATING 357

previous vehicles getting stuck. As a good practice before
entering any mud hole, get out and determine how deep
it is, if there are any hidden obstacles and if the vehicle
can be safely recovered if stuck.
Sand
Soft sand is very difficult to travel through with full tire
pressure. When crossing soft, sandy spots in a trail,
maintain your vehicle’s momentum and do not stop. The
key to driving in soft sand is using the appropriate tire
pressure, accelerating slowly, avoiding abrupt maneu-
vers and maintaining the vehicle’s momentum. If you are
going to be driving on large soft sandy areas or dunes,
reduce your tire pressure to a minimum of 15 psi
(103 kPa) to allow for a greater tire surface area. Reduced
tire pressure will drastically improve your traction and
handling while driving on the soft sand, but you must
return the tires to normal air pressure before driving on
pavement or other hard surfaces. Be sure you have a way
to reinflate the tires prior to reducing the pressure.
CAUTION!
Reduced tire pressures may cause tire unseating and
total loss of air pressure. To reduce the risk of tire
unseating, while at a reduced tire pressure, reduce your
speed and avoid sharp turns or abrupt maneuvers.
Crossing Obstacles (Rocks and Other High
Points)
While driving off-road, you will encounter many types of
terrain. These varying types of terrain bring different
types of obstacles. Before proceeding, review the path
ahead to determine the correct approach and your ability
to safely recover the vehicle if something goes wrong.
Keeping a firm grip on the steering wheel, bring the
vehicle to a complete stop and then inch the vehicle
forward until it makes contact with the object. Apply the
throttle lightly while holding a light brake pressure and
ease the vehicle up and over the object.
358 STARTING AND OPERATING