2012 JEEP WRANGLER tire pressure

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 or sidewall. Inspect the tread for cuts
and cracks. Inspect sidewalls for cuts, cracks and bulges.
Check the wheel nuts for tightness. Check the tires
(including spare) for proper cold inflation 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 89

WARNING!
A hot engine cooling system is dangerous. You or
others could be badly burned by steam or boiling
coolant. You may want to call an authorized dealer-
ship for service if your vehicle overheats. If you
decide to look under the hood yourself, see “Main-
taining Your Vehicle”. Follow the warnings under the
Cooling System Pressure Cap paragraph.
19. Cruise Indicator This indicator shows when the electronic speed
control system is turned on.
20. 4WD Indicator Light — If Equipped This light alerts the driver that the vehicle is in
the four-wheel drive mode, and the front and
rear driveshafts are mechanically locked to-
gether forcing the front and rear wheels to
rotate at the same speed. 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 Light
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
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UNDERSTANDING YOUR INSTRUMENT PANEL 275

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
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 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.
276 UNDERSTANDING YOUR INSTRUMENT PANEL

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.
24. Odometer / Trip Odometer Display Area
The odometer display shows the total distance the vehicle
has been driven. The trip odometer shows individual trip
mileage. Refer to “Odometer / Trip Odometer / ECO
(Fuel Saver Indicator) Button” for additional information.
U.S. Federal regulations require that upon transfer of
vehicle ownership, the seller certify to the purchaser the
correct mileage that the vehicle has been driven. If your
odometer needs to be repaired or serviced, the repair
technician should leave the odometer reading the same
as it was before the repair or service. If s/he cannot do so,
then the odometer must be set at zero, and a sticker must
be placed in the door jamb stating what the mileage was
before the repair or service. It is a good idea for you to
make a record of the odometer reading before the repair/
service, so that you can be sure that it is properly reset, or
that the door jamb sticker is accurate if the odometer
must be reset at zero.
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UNDERSTANDING YOUR INSTRUMENT PANEL 277

DOWN ButtonPress and release the DOWN button when
prompted by the EVIC to step through stored
system warning messages or Personal Settings
features.
Electronic Vehicle Information Center (EVIC)
Displays
When the appropriate conditions exist, the EVIC displays
the following messages:
•Low Tire Pressure
•Damaged Key
•Key in Ignition
•Turn Signal On (with a continuous warning chime)
•Left Front Turn Signal Lamp Out (with a single chime)
•Left Rear Turn Signal Lamp Out (with a single chime)
•Right Front Turn Signal Lamp Out (with a single
chime)
•Right Rear Turn Signal Lamp Out (with a single
chime)
•Key Fob Battery Low (with a single chime)
•Personal Settings Not Avail. – Vehicle Not in Park —
automatic transmission
•Personal Settings Not Avail. – Vehicle in Motion —
manual transmission
•Door Ajar (with vehicle graphic showing which door
is open. A single chime sounds if the vehicle is in
motion).
•Doors Ajar (with vehicle graphic showing which doors
are open. A single chime sounds if the vehicle is in
motion).
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UNDERSTANDING YOUR INSTRUMENT PANEL 291

▫Brake Assist System (BAS) .............. 420
▫ Hill Start Assist (HSA) ................ 420
▫ Electronic Roll Mitigation (ERM) ......... 424
▫ Electronic Stability Control (ESC) ......... 425
▫ ESC Activation/Malfunction Indicator Light
And ESC Off Indicator Light ............ 429
▫ Trailer Sway Control (TSC) ............. 430
▫ Hill Descent Control (HDC) – If Equipped . . 431
 Tire Safety Information ................. 432
▫ Tire Markings ....................... 432
▫ Tire Identification Number (TIN) ......... 436
▫ Tire Terminology And Definitions ......... 437
▫ Tire Loading And Tire Pressure .......... 438
Tires — General Information ............. 443
▫ Tire Pressure ....................... 443
▫ Tire Inflation Pressures ................ 444
▫ Tire Pressures For High-Speed Operation . . . 445
▫ Radial-Ply Tires ..................... 446
▫ Spare Tire Matching Original Equipped Tire
And Wheel – If Equipped .............. 446
▫ Compact Spare Tire – If Equipped ........ 447
▫ Full Size Spare – If Equipped ............ 447
▫ Limited-Use Spare – If Equipped ......... 448
▫ Tire Spinning ....................... 448
▫ Tread Wear Indicators ................. 449
▫ Life Of Tire ........................ 450
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STARTING AND OPERATING 369

▫Replacement Tires .................... 450
 Tire Chains .......................... 452
 Tire Rotation Recommendations ........... 453
 Tire Pressure Monitor System (TPMS) ....... 454
▫ Base System ........................ 457
▫ General Information .................. 459
 Fuel Requirements ..................... 460
▫ Reformulated Gasoline ................ 460
▫ Gasoline/Oxygenate Blends ............. 461
▫ E-85 Usage In Non-Flex Fuel Vehicles ...... 461
▫ MMT In Gasoline .................... 462
▫ Materials Added To Fuel ............... 462 ▫
Fuel System Cautions ................. 463
▫ Carbon Monoxide Warnings ............ 464
 Adding Fuel ......................... 465
▫ Fuel Filler Cap (Gas Cap) .............. 465
▫ Loose Fuel Filler Cap Message ........... 466
 Vehicle Loading ...................... 466
▫ Certification Label ................... 466
 Trailer Towing ........................ 469
▫ Common Towing Definitions ............ 469
▫ Trailer Hitch Classification .............. 472
▫ Trailer Towing Weights
(Maximum Trailer Weight Ratings) ........ 473
370 STARTING AND OPERATING

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 your
steering wheel no more than a 1/4 turn quickly back and
forth, while still applying throttle. This will allow the
tires to get a freshbiteand help maintain your momen-
tum.
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
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
402 STARTING AND OPERATING