2012 JEEP GRAND CHEROKEE overheating

Reprogramming A Single HomeLinkButton
To reprogram a channel that has been previously trained,
follow these steps:
1. Turn the ignition switch to the ON/RUN position.
2. Press and hold the desired HomeLinkbutton until
the indicator light begins to flash after 20 seconds.Do not
release the button.
3.Without releasing the buttonproceed with “Program-
ming A Non-Rolling Code” Step 2 and follow all remain-
ing steps.
Canadian/Gate Operator Programming
For programming transmitters in Canada/United States
that require the transmitter signals to “time-out” after
several seconds of transmission.
Canadian radio frequency laws require transmitter sig-
nals to time-out (or quit) after several seconds of trans-
mission – which may not be long enough for HomeLinkto pick up the signal during programming. Similar to this
Canadian law, some U.S. gate operators are designed to
time-out 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.
1. Turn the ignition switch to the ON/RUN position.
2. Place the hand-held transmitter 1 to 3 in (3 to 8 cm)
away from the HomeLinkbutton you wish to program
while keeping the HomeLinkindicator light in view.
3. Continue to press and hold the HomeLinkbutton,
while you press and release (“cycle”), your hand-held
transmitter every two seconds until HomeLinkhas
successfully accepted the frequency signal. The indicator
light will flash slowly and then rapidly when fully
trained.
3
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 247

vehicle is experiencing a problem with the charging
system. Obtain SERVICE IMMEDIATELY. See an autho-
rized dealer.
If jump starting is required, refer to “Jump Starting
Procedures” in “What To Do In Emergencies”.
•Electronic Throttle Control (ETC) Light
This light informs you of a problem with the
Electronic Throttle Control (ETC) system. The
light will come on when the ignition is first
turned ON and remain on briefly as a bulb
check. If the light does not come on during starting, have
the system checked by an authorized dealer.
If a problem is detected, the light will come on while the
engine is running. Cycle the ignition key when the
vehicle has completely stopped and the shift lever is
placed in the PARK position. The light should turn off.If the light remains lit with the engine running, your
vehicle will usually be drivable. However, see an autho-
rized dealer for service as soon as possible. If the light is
flashing when the engine is running, immediate service is
required. You may experience reduced performance, an
elevated/rough idle or engine stall and your vehicle may
require towing.
•Engine Temperature Warning Light
This light warns of an overheated engine condi-
tion. As temperatures rise and the gauge ap-
proachesH,this indicator will illuminate and a
single chime will sound after reaching a set threshold.
Further overheating will cause the temperature gauge to
passH,the indicator will continuously flash and a
continuous chime will occur until the engine is allowed
to cool.
306 UNDERSTANDING YOUR INSTRUMENT PANEL

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 (cigarette
smoke, perfumes, etc.) from sticking to the windows.
Contaminates increase the rate of window fogging.
Summer Operation
NOTE:In some cases during high temperature trailer
tow operation the Air Conditioning system performance
may be reduced. This is to help protect the engine from
overheating during the high load condition.Your air conditioning system is also equipped with an
automatic recirculation system. When the system senses
a heavy load or high heat conditions, it may use partial
Recirculation A/C mode to provide additional comfort.
Winter Operation
When operating the system during the winter months,
make sure the air intake, located directly in front of the
windshield, is free of ice, slush, snow, or other
obstructions.
Vacation Storage
Anytime you store your vehicle, or keep it out of service
(i.e. vacation) for two weeks or more, run the air condi-
tioning system at idle for about five minutes in the fresh
air and high blower setting. This will ensure adequate
system lubrication to minimize the possibility of com-
pressor damage when the system is started again.
368 UNDERSTANDING YOUR INSTRUMENT PANEL

HAZARD WARNING FLASHERS
The Hazard Warning flasher switch is located on the
switch bank just above the climate controls.
Press the switch to turn on the Hazard Warning
flasher. When the switch is activated, all directional
turn signals will flash on and off to warn oncoming
traffic of an emergency. Press the switch a second time to
turn off the Hazard Warning flashers.
This is an emergency warning system and it should not
be used when the vehicle is in motion. Use it when your
vehicle is disabled and it is creating a safety hazard for
other motorists.
When you must leave the vehicle to seek assistance, the
Hazard Warning flashers will continue to operate even
though the ignition is placed in the OFF position.
NOTE:With extended use the Hazard Warning flashers
may wear down your battery.
IF YOUR ENGINE OVERHEATS
In any of the following situations, you can reduce the
potential for overheating by taking the appropriate ac-
tion.
•On the highways — slow down.
•In city traffic — while stopped, place the transmission
in NEUTRAL, but do not increase the engine idle
speed.
NOTE:There are steps that you can take to slow down
an impending overheat condition:
•If your air conditioner (A/C) is on, turn it off. The A/C
system adds heat to the engine cooling system and
turning the A/C off can help remove this heat.
•You can also turn the temperature control to maximum
heat, the mode control to floor and the blower control
460 WHAT TO DO IN EMERGENCIES

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:•Do not shut off the engine or interrupt the ignition
when the transmission is in gear and the vehicle is in
motion.
•Do not try to start engine by pushing or towing the
vehicle.
•Do 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.
488 MAINTAINING YOUR VEHICLE

Jump Starting....................... 462
Tow Hooks......................... 466
Emission Control System Maintenance......... 473
Engine............................... 471
Air Cleaner Filter.................... 479
Break-In Recommendations.............. 94
Checking Oil Level................... 476
Compartment....................... 471
Coolant (Antifreeze).................. 489
Cooling ........................... 489
Exhaust Gas Caution.............. 47,96,439
Fails to Start........................ 379
Flooded, Starting..................... 379
Fuel Requirements.................435,517
Jump Starting....................... 462
Oil ............................476,517
Oil Change Interval................... 477
Oil Selection.....................477,517
Overheating........................ 460Starting........................... 375
Temperature Gauge................... 292
Engine Oil Viscosity...................... 478
Engine Oil Viscosity Chart................. 478
Enhanced Accident Response Feature.......... 77
Entry System, Illuminated.................. 21
Ethanol............................... 436
Event Data Recorder...................... 81
Exhaust Gas Caution.............. 47,96,439,486
Exhaust System....................... 96,486
Exterior Finish Care...................... 500
Exterior Lights.......................... 99
Filters
Air Cleaner......................... 479
Engine Oil......................... 479
Engine Oil Disposal................... 479
FinishCare ............................ 500
Flashers.............................. 460
552 INDEX

MTBE/ETBE........................... 436
Multi-Function Control Lever............... 179
New Vehicle Break-In Period................ 94
Occupant Restraints................... 48,73,78
Occupant Restraints (Sedan)........... 70,71,73,76
Octane Rating, Gasoline (Fuel).............. 435
Odometer............................. 286
Trip .............................. 286
Oil Change Indicator..................... 308
Oil Change Indicator, Reset................. 308
Oil, Engine............................ 476
Capacity........................... 517
Change Interval..................... 477
Checking.......................... 476
Disposal........................... 479
Filter ............................. 479
Filter Disposal....................... 479Identification Logo................... 478
Materials Added to................... 478
Recommendation..................477,517
Viscosity........................... 517
Onboard Diagnostic System..............472,473
Opener, Garage Door (HomeLink®)........... 241
Operator Manual (Owner’s Manual)............ 5
Outside Rearview Mirrors.................. 109
Overdrive............................. 389
Overdrive OFF Switch.................... 389
Overhead Console....................... 240
Overheating, Engine...................293,460
Owner’s Manual (Operator Manual)......... 5,543
PaintCare ............................. 499
Paint Damage.......................... 499
Panic Alarm............................ 24
Park Sense System, Rear................... 229
Parking Brake.......................... 397
558 INDEX