flat tire JEEP GRAND CHEROKEE 2006 WK / 3.G SRT Owners Manual

prevailing road conditions. The “ESP/TCS Indicator
Light” will flash any time the ESP or TCS is active and
helping to improve vehicle stability. If the “ESP/TCS
Indicator Light” is on solid, the ESP system has been
turned off by the driver or a temporary condition exists
that will not allow full ESP function. (See page 130 for
more information.)
12. 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 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. Accord-
ingly, when the low tire pressure telltale illuminates, you
should stop and check your tires as soon as possible, and
inflate them to the proper pressure. Driving on a signifi-
cantly 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.
UNDERSTANDING YOUR INSTRUMENT PANEL 179
4

Engine Oil Temperature
Shows the current engine oil temperature. The scale will
read from 140° – 300°F (60° – 149°C).
Tire Pressure Display
Shows the current pressure of all 4 road tires.NOTE:Tires heat up during normal driving conditions.
Heat will cause the tire pressure to increase from 2 to 6
psi (14 to 41 kPa) during normal driving conditions. Refer
to “Tire Inflation Pressures” in Section 5 for additional
information.
Miles to Service
Shows the distance remaining to require service.
NOTE:This display can be reset to the set service
interval by pressing and holding the RESET button for 3
seconds.
Blank Screen
Shows a blank screen. Pressing the C/T button returns to
the compass/temperature display.
Manual Compass Calibration
If the compass appears erratic and the “CAL” symbol
does not appear, you must manually put the compass
into the “Calibration” mode.
Tire Pressure Display
194 UNDERSTANDING YOUR INSTRUMENT PANEL

▫Tire Loading And Tire Pressure...........252

Tires — General Information...............256
▫Run Flat Tires........................256
▫Tire Pressure.........................257
▫Tire Inflation Pressures.................258
▫Tire Pressures For High Speed Operation....260
▫Radial-Ply Tires......................261
▫Tire Spinning........................261
▫Tread Wear Indicators..................262
▫Life Of Tire.........................262
▫Replacement Tires.....................263
▫Alignment And Balance.................264

Tire Pressure Monitor System (TPMS)........265▫Premium System......................265
▫General Information...................268

Tire Rotation Recommendations............268

Fuel Requirements......................268
▫Spark Knock.........................268
▫Reformulated Gasoline.................269
▫Gasoline/Oxygenate Blends..............269
▫MMT In Gasoline.....................270
▫Materials Added To Fuel................270
▫Fuel System Cautions..................270
▫Carbon Monoxide Warnings..............271

Fuel Tank Filler Cap (Gas Cap).............272
▫Loose Fuel Filler Cap Message............273
232 STARTING AND OPERATING

WARNING!
•Leaving children unattended in a vehicle is dan-
gerous for a number of reasons. A child or others
could be injured. Children should be warned not
to touch the parking brake or the gear selector
lever. Don’t leave the keys in the ignition. A child
could operate power windows, other controls, or
move the vehicle.
•Do not leave children or animals inside parked
vehicles in hot weather. Interior heat build up
may cause serious injury or death.
To release the parking brake, pull up slightly, press the
center button, then lower the lever completely.
Be sure the parking brake is fully disengaged before
driving. Failure to do so can lead to brake failure.NOTE:Parking brake adjustment and maintenance
should be performed by your authorized dealer.
ANTI-LOCK BRAKE SYSTEM
The Anti-Lock Brake System (ABS) is designed to aid the
driver in maintaining vehicle control under adverse
braking conditions. The system operates with a separate
computer to modulate hydraulic pressure to prevent
wheel lock-up and help avoid skidding on slippery
surfaces.
All vehicle wheels and tires must be the same size and
type and tires must be properly inflated to produce
accurate signals for the computer.
WARNING!
Significant over or under inflation of tires can lead
to loss of braking effectiveness.
STARTING AND OPERATING 243
5

EXAMPLE:
Service Description:
95= Load Index
—A numerical code associated with the maximum load a tire can carry.
H= Speed Symbol
—A symbol indicating the range of speeds at which a tire can carry a load corresponding
to its load index under certain operating conditions.
—The maximum speed corresponding to the Speed Symbol should only be achieved un-
der specified operating conditions. (i.e. tire pressure, vehicle loading, road conditions and
posted speed limits).
Load Identification:
....blank....= Absence of any text on sidewall of the tire indicates a Standard Load (SL) Tire
Extra Load (XL)= Extra Load (or Reinforced) Tire
Light Load= Light Load Tire
C,D,E= Load range associated with the maximum load a tire can carry at a specified pressure
Maximum Load— Maximum Load indicates the maximum load this tire is designed to carry.
Maximum Pressure— Maximum Pressure indicates the maximum permissible cold tire inflation pressure for this
tire.
250 STARTING AND OPERATING

Tire Loading and Tire Pressure
Tire Placard Location
NOTE:The proper cold tire inflation pressure is listed
on either the face of the driver’s door or the driver’s side
“B” pillar.
Tire and Loading Information Placard
This placard tells you important information about
the:
1) number of people that can be carried in the vehicle
2) the total weight your vehicle can carry
Tire Placard Location
Tire and Loading Information
252 STARTING AND OPERATING

3) the tire size designed for your vehicle
4) the cold tire inflation pressures for the front, rear
and spare tires.
Loading
The vehicle maximum load on the tire must not exceed
the load carrying capacity of the tire on your vehicle. You
will not exceed the tire’s load carrying capacity if you
adhere to the loading conditions, tire size, and cold tire
inflation pressures specified on the “Tire and Loading
Information” placard and in the “Vehicle Loading” sec-
tion of this manual.
NOTE:Under a maximum loaded vehicle condition,
gross axle weight ratings (GAWR’s) for the front and rear
axles must not be exceeded. For further information on
GAWR’s, vehicle loading, and trailer towing, refer to the
“Vehicle Loading” section of this manual.To determine the maximum loading conditions of your
vehicle, locate the statement “The combined weight of
occupants and cargo should never exceed XXX kg or XXX
lbs.” on the Tire and Loading Information placard. The
combined weight of occupants, cargo/luggage and
trailer tongue weight (if applicable) should never exceed
the weight referenced here.
Steps for Determining Correct Load Limit
1. Locate the statement “The combined weight of occu-
pants and cargo should never exceed XXX pounds” on
your vehicle’s placard.
2. Determine the combined weight of the driver and
passengers that will be riding in your vehicle.
3. Subtract the combined weight of the driver and pas-
sengers from XXX kilograms or XXX pounds.
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5

WARNING!
Overloading of your tires is dangerous. Overloading
can cause tire failure, affect vehicle handling, and
increase your stopping distance. Use tires of the
recommended load capacity for your vehicle. Never
overload them.
TIRES — GENERAL INFORMATION
Run Flat Tires
This vehicle is equipped with run flat tires. Although the
tires are designed with a “run flat” feature that allows the
vehicle to be driven about 50 miles (80 km) at 55 mph (88
km/h), immediate service should be obtained.
WARNING!
Do not exceed 55 mph (88 km/h) if the “Tire Pressure
Monitoring Telltale Light” is illuminated. Vehicle
handling and braking may be reduced. You could
have an accident and be severely or fatally injured.
NOTE:The “run flat” feature eliminates the need for a
spare tire or jack. This vehicle is not equipped with either
a spare tire or jack.
256 STARTING AND OPERATING

Tire Pressure
Proper tire inflation pressure is essential to the safe and
satisfactory operation of your vehicle. Three primary
areas are affected by improper tire pressure:1. Safety—
WARNING!
Improperly inflated tires are dangerous and can
cause accidents.
•Under inflation increases tire flexing and can
result in tire failure.
•Over inflation reduces a tire’s ability to cushion
shock. Objects on the road and chuck holes can cause
damage that results in tire failure.
•Unequal tire pressures can cause steering prob-
lems. You could lose control of your vehicle.
•Overinflated or under inflated tires can affect
vehicle handling and can fail suddenly, resulting in
loss of vehicle control.
•Unequal tire pressures from one side of the vehicle
to the other can cause the vehicle to drift to the right
or left.
Always drive with each tire properly inflated.
STARTING AND OPERATING 257
5

2. Economy—
Improper inflation pressures can cause uneven wear
patterns to develop across the tire tread. These abnormal
wear patterns will reduce tread life resulting in a need for
earlier tire replacement. Under inflation also increases
tire rolling resistance and results in higher fuel consump-
tion.
3. Ride Comfort and Vehicle Stability—
Proper tire inflation contributes to a comfortable ride.
Over inflation produces a jarring and uncomfortable ride.
Both under inflation and over inflation affect the stability
of the vehicle and can produce a feeling of sluggish
response or over responsiveness in the steering.
Unequal tire pressures can cause erratic and unpredict-
able steering response.
Unequal tire pressure from side to side may cause the
vehicle to drift left or right.Tire Inflation Pressures
The proper cold tire inflation pressure is listed on either
the face of the driver’s door, or the driver’s side “B” pillar.
The pressure should be checked and adjusted as well as
inspecting for signs of tire wear or visible damage at least
once a month. Use a good quality pocket-type gauge to
Tire Placard Location
258 STARTING AND OPERATING