2013 JEEP GRAND CHEROKEE tire size

Automatic Locking Retractor Mode
(ALR) — If Equipped
In this mode, the shoulder belt is automatically
pre-locked. The belt will still retract to remove
any slack in the shoulder belt. The Automatic
Locking Mode is available on all rear
passenger-seating positions with a combination
lap/shoulder belt. Use the Automatic Locking
Mode anytime a child safety seat is installed in
a seating position that has a belt with this
feature. Children 12 years old and under should
always be properly restrained in the rear seat.
How To Engage The Automatic Locking
Mode
1. Buckle the combination lap and shoulder
belt.
2. Grasp the shoulder portion and pull down-
ward until the entire belt is extracted.
3. Allow the belt to retract. As the belt retracts,
you will hear a clicking sound. This indicates the
safety belt is now in the Automatic Locking
Mode.How To Disengage The Automatic Locking
Mode
Unbuckle the combination lap/shoulder belt and
allow it to retract completely to disengage the
Automatic Locking Mode and activate the ve-
hicle sensitive (emergency) locking mode.
WARNING!
•
The belt and retractor assembly must be
replaced if the seat belt assembly Auto-
matic Locking Retractor (ALR) feature or
any other seat belt function is not working
properly when checked according to the
procedures in the Service Manual.
• Failure to replace the belt and retractor
assembly could increase the risk of injury
in collisions.
Energy Management FeatureThis vehicle has a safety belt system with an
Energy Management feature in the front seating
positions to help further reduce the risk of injury
in the event of a head-on collision. This safety belt system has a retractor assem-
bly that is designed to release webbing in a
controlled manner. This feature is designed to
help reduce the belt force acting on the occu-
pant’s chest.
Seat Belt PretensionersThe seat belts for both front seating positions are
equipped with pretensioning devices that are de-
signed to remove slack from the seat belt in the
event of a collision. These devices may improve
the performance of the seat belt by assuring that
the belt is tight about the occupant early in a
collision. Pretensioners work for all size occu-
pants, including those in child restraints.
NOTE:
These devices are not a substitute for
proper seat belt placement by the occupant.
The seat belt still must be worn snugly and
positioned properly.
The pretensioners are triggered by the Occupant
Restraint Controller (ORC). Like the air bags, the
pretensioners are single use items. A deployed
pretensioner or a deployed air bag must be re-
placed immediately.
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Floor Mat Safety Information
Always use floor mats designed to fit the foot-
well of your vehicle. Use only floor mats that
leave the pedal area unobstructed and that are
firmly secured so that they cannot slip out of
position and interfere with the pedals or impair
safe operation of your vehicle in other ways.
WARNING!
Pedals that cannot move freely can cause
loss of vehicle control and increase the risk
of serious personal injury.
•
Always make sure that floor mats are prop-
erly attached to the floor mat fasteners.
•Never place or install floor mats or other
floor coverings in the vehicle that cannot
be properly secured to prevent them from
moving and interfering with the pedals or
the ability to control the vehicle.
(Continued)
WARNING!(Continued)
•Never put floor mats or other floor cover-
ings on top of already installed floor mats.
Additional floor mats and other coverings
will reduce the size of the pedal area and
interfere with the pedals.
• Check mounting of mats on a regular
basis. Always properly reinstall and secure
floor mats that have been removed for
cleaning.
• Always make sure that objects cannot fall
into the driver footwell while the vehicle is
moving. Objects can become trapped un-
der the brake pedal and accelerator pedal
causing a loss of vehicle control.
• If required, mounting posts must be prop-
erly installed, if not equipped from the
factory.
Failure to properly follow floor mat installa-
tion or mounting can cause interference with
the brake pedal and accelerator pedal opera-
tion 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 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 brake
lights and 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 park-
ing 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.
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WARNING!(Continued)
detect the ball mount and hitch ball assem-
bly, depending on its size and shape,
giving a false indication that an obstacle is
behind the vehicle.
PARKVIEW® REAR BACK UP
CAMERA — IF EQUIPPED
Your vehicle may be equipped with the
ParkView® Rear Back Up Camera that allows you
to see an on-screen image of the rear surround-
ings of your vehicle whenever the shift lever is put
into REVERSE. The image will be displayed on
the Navigation/Multimedia radio display screen
along with a caution note to “check entire sur-
roundings” across the top of the screen. After five
seconds this note will disappear. The ParkView®
camera is located on the rear of the vehicle above
the rear License plate.
When the vehicle is shifted out of REVERSE,
the rear camera mode is exited and the naviga-
tion or audio screen appears again.
When displayed, static grid lines will illustrate
the width of the vehicle while a dashed center-
line will indicate the center of the vehicle to
assist with aligning to a hitch/receiver. The static
grid lines will show separate zones that will help
indicate the distance to the rear of the vehicle.
The following table shows the approximate dis-
tances for each zone:
ZoneDistance to the rear of the vehicle
Red 0-1ft(0-30cm)
Yellow 1 ft-3ft(30cm-1m)
Green 3 ft or greater (1 m or greater)
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10. Electronic Vehicle Information Center
(EVIC) Display/Odometer Display
The odometer display shows the total distance
the vehicle has been driven.
The Electronic Vehicle Information Center
(EVIC). Refer to “Electronic Vehicle Information
Center”.
11. Tire Pressure Monitoring Telltale LightEach tire, including the spare (if
provided), should be checked
monthly when cold and inflated
to the inflation pressure recom-
mended by the vehicle manufac-
turer 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 pres-
sure telltale when one or more of your tires is
significantly under-inflated. 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 pres-
sure. 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 approxi-
mately one minute and then remain continu-
ously 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.
CAUTION!
The TPMS has been optimized for the origi-
nal equipment tires and wheels. TPMS pres-
sures and warning have been established for
the tire size equipped on your vehicle. Un-
desirable system operation or sensor dam-
age may result when using replacement
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.
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•PARKING BRAKE .............................250
• ELECTRONIC BRAKE CONTROL SYSTEM .............252
•Anti-Lock Brake System (ABS) ...................252
• Traction Control System (TCS) ....................252
• Brake Assist System (BAS) ..................... .252
• Electronic Roll Mitigation (ERM) ...................253
• Electronic Stability Control (ESC) ..................253
• Trailer Sway Control (TSC) ..................... .255
• Hill Start Assist (HSA) ........................ .256
• Ready Alert Braking ......................... .257
• Rain Brake Support .......................... .257
• Hill Descent Control (HDC) — Four-Wheel Drive Models With
MP3023 Two-Speed Transfer Case Only ..............257
• ESC Activation/Malfunction Indicator Light And ESC OFF
Indicator Light ............................ .258
•TIRES — GENERAL INFORMATION ..................259•Tire Pressure ............................. .259
• Tire Inflation Pressures ........................260
• Tire Pressures For High Speed Operation .............260
• Radial Ply Tires ............................ .261
• All Season Tires – If Equipped ....................261
• Summer Or Three Season Tires – If Equipped ...........261
• Snow Tires .............................. .261
• Spare Tire Matching Original Equipped Tire And Wheel – If
Equipped ................................ .262
• Compact Spare Tire – If Equipped ..................262
• Full Size Spare – If Equipped .................... .262
217

•If the vehicle has not been driven for
several days, the first few seconds of
operation after shifting the transmission
into gear may seem sluggish. This is due
to the fluid partially draining from the
torque converter into the transmission.
This condition is normal and will not
cause damage to the transmission. The
torque converter will refill within five sec-
onds after starting the engine.
FOUR-WHEEL DRIVE
OPERATION
Quadra-Trac II® Operating
Instructions/Precautions
The Quadra-Trac II® transfer case is fully auto-
matic in the normal driving 4WD AUTO mode.
The Quadra-Trac II® transfer case provides
three mode positions:
•4WD HI
• NEUTRAL
• 4WD LOW This transfer case is fully automatic in the 4WD
HI mode.
When additional traction is required, the 4WD
LOW position can be used to lock the front and
rear driveshafts together and force the front and
rear wheels to rotate at the same speed. The
4WD LOW position is intended for loose, slip-
pery road surfaces only. Driving in the 4WD
LOW position on dry, hard-surfaced roads may
cause increased tire wear and damage to drive-
line components.
When operating your vehicle in 4WD LOW, the
engine speed is approximately three times that
of the 4WD HI position at a given road speed.
Take care not to overspeed the engine and do
not exceed 25 mph (40 km/h).
Proper operation of four-wheel drive vehicles
depends on tires of equal size, type, and cir-
cumference 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 NEUTRAL (N) position without first
fully engaging the parking brake. The trans-
fer case NEUTRAL (N) position disengages
both the front and rear driveshafts 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.
237

WARNING!
High speed driving with your vehicle under
maximum load is dangerous. The added
strain on your tires could cause them to fail.
You could have a serious collision. Do not
drive a vehicle loaded to the maximum ca-
pacity at continuous speeds above 75 mph
(120 km/h).
Radial Ply Tires
WARNING!
Combining radial ply tires with other types of
tires on your vehicle will cause your vehicle
to handle poorly. The instability could cause
a collision. Always use radial ply tires in sets
of four. Never combine them with other types
of tires.
Cuts and punctures in radial tires are repairable
only in the tread area because of sidewall
flexing. Consult your authorized tire dealer for
radial tire repairs.
All Season Tires – If EquippedAll Season tires provide traction for all seasons
(spring, summer, fall and winter). Traction levels
may vary between different all season tires. All
season tires can be identified by the M+S, M&S,
M/S or MS designation on the tire sidewall. Use
all season tires only in sets of four; failure to do
so may adversely affect the safety and handling
of your vehicle.
Summer Or Three Season Tires – If
Equipped
Summer tires provide traction in both wet and
dry conditions, and are not intended to be
driven in snow or on ice. Summer tires will not
contain the all season designation or mountain/
snowflake symbol on the tire sidewall. Use
summer tires only in sets of four; failure to do so
may adversely affect the safety and handling of
your vehicle.
Snow TiresSome areas of the country require the use of
snow tires during the winter. Snow tires can be
identified by a mountain/snowflake symbol on
the tire sidewall.
If you need snow tires, select tires equivalent in
size and type to the original equipment tires.
Use snow tires only in sets of four; failure to do
so may adversely affect the safety and handling
of your vehicle.
Snow tires generally have lower speed ratings
than what was originally equipped with your
vehicle and should not be operated at sustained
speeds over 75 mph (120 km/h). For speeds
above 75 mph (120 km/h) refer to original
equipment or an authorized tire dealer for rec-
ommended safe operating speeds, loading and
cold tire inflation pressures.
While studded tires improve performance on
ice, skid and traction capability on wet or dry
surfaces may be poorer than that of non-
studded tires. Some states prohibit studded
tires; therefore, local laws should be checked
before using these tire types.
261

Spare Tire Matching Original
Equipped Tire And Wheel – If
Equipped
Your vehicle may be equipped with a spare tire
and wheel equivalent in look and function to the
original equipment tire and wheel found on the
front or rear axle of your vehicle. This spare tire
may be used in the tire rotation for your vehicle.
If your vehicle has this option refer to an autho-
rized tire dealer for the recommended tire rota-
tion pattern.
Compact Spare Tire – If EquippedThe compact spare is for temporary emergency
use only. You can identify if your vehicle is
equipped with a compact spare by looking at
the spare tire description on the Tire and Load-
ing Information Placard located on the driver’s
side door opening or on the sidewall of the tire.
Compact spare tire descriptions begin with the
letter “T” or “S” preceding the size designation.
Example: T145/80D18 103M.
T, S = Temporary Spare TireSince this tire has limited tread life the original
equipment tire should be repaired (or replaced)
and reinstalled on your vehicle at the first op-
portunity.
Do not install a wheel cover or attempt to mount
a conventional tire on the compact spare wheel,
since the wheel is designed specifically for the
compact spare tire. Do not install more than one
compact spare tire and wheel on the vehicle at
any given time.
WARNING!
Compact spares are for temporary emer-
gency use only. With these spares, do not
drive more than 50 mph (80 km/h). Tempo-
rary use spares have limited tread life. When
the tread is worn to the tread wear indicators,
the temporary use spare tire needs to be
replaced. Be sure to follow the warnings,
which apply to your spare. Failure to do so
could result in spare tire failure and loss of
vehicle control.
Full Size Spare – If EquippedThe full size spare is for temporary emergency
use only. This tire may look like the originally
equipped tire on the front or rear axle of your
vehicle, but it is not. This spare tire may have
limited tread life. When the tread is worn to the
tread wear indicators, the temporary use full size
spare tire needs to be replaced. Since it is not the
same as your original equipment tire, replace (or
repair) the original equipment tire and reinstall on
the vehicle at the first opportunity.
Limited-Use Spare – If EquippedThe limited-use spare tire is for temporary emer-
gency use only. This tire is identified by a label
located on the limited-use spare wheel. This label
contains the driving limitations for this spare. This
tire may look like the original equipped tire on the
front or rear axle of your vehicle, but it is not.
Installation of this limited-use spare tire affects
vehicle handling. Since it is not the same as your
original equipment tire, replace (or repair) the
original equipment tire and reinstall on the vehicle
at the first opportunity.
262