2008 JEEP GRAND CHEROKEE overheating

7. Return to the vehicle and press the programmed
HomeLinktbutton twice (holding the button for 2 sec-
onds each time). If the device is plugged in and activates,
programming is complete.
If the device does not activate, press the button a third
time (for 2 seconds) to complete the training.
If you are have any problems, or require assistance,
please call toll-free 1±800±355±3515 or, on the Internet at
www.HomeLink.com for information or assistance.
To program the remaining two HomeLinktbuttons,
repeat each step for each remaining button. DO NOT
erase the channels.
Gate Operator/Canadian Programming
Canadian radio-frequency laws require transmitter sig-
nals to ªtime-outº (or quit) after several seconds of
transmission ± which may not be long enough for
HomeLinktto pick up the signal during programming.Similar to this Canadian law, some U.S. gate operators are
designed to ªtime-outº in the same manner.
It may be helpful to unplug the device during the cycling
process to prevent possible overheating of the garage
door or gate motor.
If you are having difficulties programming a garage door
opener or a gate operator, replace ªProgramming
HomeLinkº Step 3 with the following:
3. Continue to press and hold the HomeLinktbutton
while you press and release - every two seconds
(ªcycleº) your hand-held transmitter until HomeLinkt
has successfully accepted the frequency signal. The
EVIC display will change from ªCHANNEL # TRAIN-
INGº to ªCHANNEL # TRAINED.º
If you unplugged the device for training, plug it back in
at this time.
152 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

Operating Tips
Window Fogging
Windows will fog on the inside when the humidity inside
the vehicle is high. This often occurs in mild or cool
temperatures when it's rainy or humid. In most cases
turning on the Air-conditioning (pressing the snowflake
button) will clear the fog. Adjust the temperature control,
air direction and blower speed to maintain comfort.
As the temperature gets colder it may be necessary to
direct air onto the windshield. Adjust the temperature
control and blower speed to maintain comfort. Higher
blower speeds will reduce fogging. Interior fogging on
the windshield can be quickly removed by selecting the
defrost mode.
Regular cleaning of the inside of the windows with a
non-filming cleaning solution (vinegar and water works
very well) will help prevent contaminates (cigarettesmoke, perfumes, etc.) from sticking to the windows.
Contaminates increase the rate of window fogging.Summer Operation
Air conditioned vehicles must be protected with a high
quality antifreeze coolant during summer to provide
proper corrosion protection and to raise the boiling point
of the coolant for protection against overheating. A 50 %
concentration is recommended. Refer to Recommended
Fluids and Genuine Parts for the proper coolant type.
When using the air conditioner in extremely heavy traffic
in hot weather especially when towing a trailer, addi-
tional engine cooling may be required. If this situation is
encountered, operate the transmission in a lower gear to
increase engine RPM, coolant flow and fan speed. When
stopped in heavy traffic, it may be necessary to shift into
N (Neutral) and depress the accelerator slightly for fast
idle operation to increase coolant flow and fan speed.
236 UNDERSTANDING YOUR INSTRUMENT PANEL

STARTING PROCEDURES
Before starting your vehicle, adjust your seat, adjust the
inside and outside mirrors, fasten your seat belt, and if
present, instruct all other occupants to buckle their seat
belts.WARNING!
²Never leave children alone in a vehicle. Leaving
children in a vehicle unattended is dangerous for a
number of reasons. A child or others could be
seriously or fatally injured. Don't leave the keys in
the ignition. A child could operate power windows,
other controls, or move the vehicle.
²Do not leave animals or children inside parked
vehicles in hot weather; interior heat build up may
cause serious injury or death.
²Be sure to turn off the engine and remove the key
from the ignition switch if you want to rest or sleep
in your car. Accidents can be caused by inadvert-
ently moving the gear selection lever. Accidents can
also be caused by pressing the accelerator pedal.
This may cause excessive heat in the exhaust sys-
tem, resulting in overheating and vehicle fire,
which may cause serious or fatal injuries.
242 STARTING AND OPERATING

NOTE:The Electronic Stability Program (ESP) and
Traction Control (if equipped) should be turned OFF
before attempting to rock the vehicle. Refer to ªElectronic
Brake Control Systemº in Section 3 of this manual.
The least amount of accelerator pedal pressure to main-
tain the rocking motion without spinning the wheels or
racing the engine is most effective. Racing the engine or
spinning the wheels, due to the frustration of not freeing
the vehicle, may lead to transmission overheating and
failure. Allow the engine to idle with the transmission
selector in N (Neutral) for at least one minute after every
five rocking-motion cycles. This will minimize overheat-
ing and reduce the risk of transmission failure during
prolonged efforts to free a stuck vehicle.CAUTION!
When ªrockingº a stuck vehicle by moving between
ªFirstº and R (Reverse), do not spin the wheels faster
than 15 mph (24 km/h), or drivetrain damage may
result.
AUTOSTICK
Autostick is a driver-interactive transmission that offers
manual gear shifting capability to provide the driver
with more control. Autostick allows the driver to increase
engine braking ability, control upshift and downshift
points, and enhance the driving experience. This system
can also provide the driver with more control during
passing, city driving, mountain driving, trailer towing,
and many other situations.
250 STARTING AND OPERATING

IF YOUR ENGINE OVERHEATS
In any of the following situations, you can reduce the
potential for overheating by taking the appropriate ac-
tion.
²On the highways Ð Slow down.
²In city traffic Ð While stopped, put transmission in N
(Neutral), but do not increase engine idle speed.
NOTE:There are steps that you can take to slow down
an impending overheat condition. If your air conditioner
is on, turn it off. The air conditioning system adds heat to
the engine cooling system and turning off the A/C
removes this heat. You can also turn the Temperature
Control to maximum heat, the Mode Control to floor, and
the Fan Control to High. This allows the heater core to act
as a supplement to the radiator and aids in removing heat
from the engine cooling system.
CAUTION!
Driving with a hot cooling system could damage
your vehicle. If the temperature gauge reads ªHº,
pull over and stop the vehicle. Idle the vehicle with
the air conditioner turned off until the pointer drops
back into the normal range. If the pointer remains on
the ªHº, and you hear continuous chimes, turn the
engine off immediately, and call for service.
WHAT TO DO IN EMERGENCIES 299
6

WARNING!
A hot exhaust system can start a fire if you park over
materials that can burn. Such materials might be
grass or leaves coming into contact with your exhaust
system. Do not park or operate your vehicle in areas
where your exhaust system can contact anything that
can burn.
In unusual situations involving grossly malfunctioning
engine operation, a scorching odor may indicate severe
and abnormal catalyst overheating. If this occurs, the
vehicle should be stopped, the engine shut off and the
vehicle allowed to cool. Thereafter, service, including a
tune-up to manufacturer's specifications, should be ob-
tained immediately.To minimize the possibility of catalyst damage:²Do not shut off the engine or interrupt the ignition
when the transmission is in gear and the vehicle is in
motion.
²Do not try to start engine by pushing or towing the
vehicle.
²Do not idle the engine with any spark plug wires
disconnected or removed, such as when diagnostic
testing, or for prolonged periods during very rough
idling or malfunctioning operating conditions.
Maintenance-Free Battery
Your vehicle is equipped with a maintenance-free battery.
You will never have to add water, nor is periodic main-
tenance required.
318 MAINTAINING YOUR VEHICLE

Air Cleaner Filter...................... 316
Break-In Recommendations................ 66
Checking Oil Level..................... 311
Compartment......................... 306
Compartment Identification............... 306
Coolant (Antifreeze).................... 324
Cooling............................. 324
Exhaust Gas Caution..................66,281
Fails to Start.......................... 244
Fuel Requirements..................278,352
Oil .............................. 311,352
Oil Change Interval.................... 312
Oil Selection.......................313,352
Overheating.......................... 299
Starting............................. 242
Temperature Gauge..................... 178
Engine Oil Viscosity...................... 314
Engine Oil Viscosity Chart................. 314
Enhanced Accident Response Feature.......... 52Entry System, Illuminated.................. 19
Ethanol............................... 279
Event Data Recorder...................... 54
Exhaust Gas Caution................66,281,323
Exhaust System......................... 323
Exterior Finish Care...................... 334
Fabric Care............................ 336
Filters
Air Cleaner.......................... 316
Engine Fuel.......................... 317
Engine Oil........................... 315
Engine Oil Disposal.................... 315
Finish Care............................ 334
Flashers.............................. 298
Hazard Warning....................... 298
Turn Signal.....................174,349,350
Flipper Glass, Liftgate..................... 33
Flooded Engine Starting................... 244
390 INDEX

MP3 Player............................ 212
MTBE/ETBE........................... 279
Multi-Function Control Lever............... 119
Navigation Radio........................ 215
Navigation System....................... 215
New Vehicle Break-In Period................ 66
Occupant Restraints....................... 34
Octane Rating, Gasoline (Fuel).............. 278
Odometer..........................179,180
Trip ................................ 179
Oil, Engine............................ 311
Capacity............................ 352
Change Interval....................... 312
Checking............................ 311
Disposal............................ 315
Filter............................... 315
Filter Disposal........................ 315Materials Added to..................... 315
Pressure Warning Light.................. 176
Recommendation...................313,352
Viscosity............................ 352
Onboard Diagnostic System..............307,308
Opener, Garage Door (HomeLinkt) ........... 148
Outside Rearview Mirrors.................. 75
Overhead Console....................... 147
Overheating, Engine...................179,299
Owner's Manual (Operator Manual).......... 380
Paint Care............................. 333
Paint Damage.......................... 333
Panic Alarm............................ 22
Park Sense System, Rear................... 142
Parking Brake.......................... 253
Passing Light........................... 124
Pedals, Adjustable....................... 130
Personal Settings........................ 190
396 INDEX