2004 JEEP GRAND CHEROKEE overheating

Gate Operator/Canadian Programming
Canadian radio-frequency laws require transmitter sig-
nals to9time-out9(or quit) after several seconds of
transmission - which may not be long enough for
HomeLink to pick up the signal during programming.
Similar to this Canadian law, some U.S. gate operators are
designed to9time-out9in the same manner.
If you live in Canada or you are having difficulties
programming a gate operator by using the9Program-
ming HomeLink9procedures (regardless of where you
live), replace step two with the following:
NOTE:If programming a garage door opener or gate
operator, it is advised to unplug the device during the
9cycling9process to prevent possible overheating.
Press and hold the HomeLink button while you press
and release - every two seconds ((cycle() your hand-heldtransmitter button until the radio signal has success-
fully been accepted by HomeLink. (The message
TRAINED will appear on the HomeLink display.)
Proceed with the remaining steps under9Programming
HomeLink9to complete.
Using HomeLink
To operate, simply press and release the programmed
HomeLink button. Activation will now occur for the
trained device (i.e. garage door opener, gate operator,
security system, entry door lock, home/office lighting,
etc.). For convenience, the hand-held transmitter of the
device may also be used at any time. In the event that
there are still programming difficulties or questions,
contact HomeLink at:www.homelink.comor1-800-355-
3515.
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 111
3

reaches the appropriate temperature. Refer to the ªNoteº
under ªTorque Converter Clutchº later in this section.
If the transmission temperature gets too hot, the trans-
mission may downshift out of Overdrive or engage
overdrive at higher vehicle speeds (4.7L engines only)
until the transmission cools down. After cooldown, Over-
drive will resume normal operation.
2ÐSecond
For driving slowly in heavy city traffic or on mountain
roads where more precise speed control is desirable. Use
it also when climbing long grades, and for engine brak-
ing when descending moderately steep grades. To pre-
vent excessive engine speed, do not exceed 45 mph (72
km/h) in this range.
1ÐFirst
For driving up very steep hills and for engine braking at
low speeds (25 mph (40 km/h) or less) when going
downhill. To prevent excessive engine speed do not
exceed 25 mph (40 km/h) in this range.
CAUTION!
Never race the engine with the brakes on and the
vehicle in gear, and never hold the vehicle on an
incline without applying the brakes. These practices
can cause overheating and damage to the transmis-
sion.
184 STARTING AND OPERATING

Rocking the Vehicle
If the vehicle becomes stuck in snow, sand, or mud, it can
often be moved by a rocking motion. Move the gear
selector rhythmically between ªFirstº and R (Reverse),
while applying slight pressure to the accelerator.
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.
FOUR-WHEEL DRIVE OPERATION
Selec-TracTOperating Instructions/Precautions
The Selec-Tracttransfer case provides five mode posi-
tions Ð two (rear) wheel drive high mode, part-time four
wheel drive high range, full-time four wheel drive high
range, neutral, and four wheel drive low range.
This transfer case is equipped with an inter-axle differ-
ential which allows driving the vehicle in the 4 FULL
TIME position at all times on any given road surface
including dry hard surfaced roads. The 4 FULL TIME
186 STARTING AND OPERATING

Always load a trailer with 60% of the cargo weight in the
front of the trailer. This places approximately 10% to 15%
of the GTW on the tow hitch of your vehicle. This portion
of the GTW becomes the tongue weight.
Trailer sway control and equalizing hitch are required for
tongue weights above 350 lbs (159 kg)., i.e., trailer
weights heavier than 3,500 lbs (1 587 kg).
Cooling System TipsÐTrailer Towing
To reduce potential for engine and transmission over-
heating in high ambient conditions, take the following
actions:
²City Traffic
When stopped, put transmission in N (Neutral) and
increase engine idle speed.
²Highway Driving
Reduce speed.
²Air Conditioning
Turn off temporarily.
To reduce the potential for transmission overheating,
turn the ªOverdriveº off when pulling any trailer or shift
the transmission to Drive position 2 on more severe
grades. Move the shift lever to the next lower position to
eliminate excessive transmission shifting. This action will
also reduce the possibility of transmission overheating
and provide better engine braking.
STARTING AND OPERATING 229
5

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 237
6

CAUTION!
Damage to the catalytic converter can result if your
vehicle is not kept in proper operating condition. In
the event of engine malfunction, particularly involv-
ing engine misfire or other apparent loss of perfor-
mance, have your vehicle serviced promptly. Contin-
ued operation of your vehicle with a severe
malfunction could cause the converter to overheat,
resulting in possible damage to the converter and
vehicle.
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 ex-
haust system. Do not park or operate your vehicle in
areas where your exhaust system can contact any-
thing that can burn.
In unusual situations involving grossly malfunctioning
engine operation, a scorching odor may suggest severe
and abnormal catalyst overheating. If this occurs, stop
the vehicle, turn off the engine and allow it to cool.
Service, including a tune up to manufacturer's specifica-
tions, should be obtained immediately.
262 MAINTAINING YOUR VEHICLE

Coolant Temperature Gauge.............. 131
Engine Oil Pressure Gauge............... 130
Freeing Vehicle When Stuck............... 186
Hazard Warning Flasher................. 236
Jacking............................. 242
Jump Starting......................... 246
Tow Hooks.......................... 248
Emission Control System Maintenance......254,296
Engine
Air Cleaner.......................... 264
Block Heater......................... 178
Break-In Recommendations................ 51
Compartment......................251,252
Cooling............................. 269
Exhaust Gas Caution.................... 51
Fails to Start.......................... 177
Flooded, Starting...................... 177
Fuel Requirements..................221,291
Jump Starting......................... 246Malfunction Indicator................... 130
Oil ................................ 291
Oil Change Interval.................... 258
Oil Disposal.......................... 260
Oil Filter............................ 260
Oil Filter Disposal...................... 260
Oil Pressure Gauge..................... 130
Oil Selection.......................... 291
Overheating.......................... 237
Starting............................. 176
Temperature Gauge..................... 131
Engine Oil Viscosity Chart................. 259
Entry System, Illuminated.................. 15
Exhaust Gas Caution...................... 51
Exhaust System......................... 269
Extender, Seat Belt........................ 35
Exterior Finish Care...................... 282
332 INDEX

Off-Pavement Driving.................... 285
Off-Road Driving.....................200,285
Oil, Engine
Capacity............................ 291
Change Interval....................... 258
Dipstick............................. 256
Identification Logo..................... 259
Materials Added to..................... 260
Pressure Gauge....................... 130
Recommendation...................259,291
Viscosity............................ 291
Onboard Diagnostic System..............253,254
Opener, Garage Door..................... 106
Outside Rearview Mirrors.................. 61
Overdrive..........................132,182
Overhead Console........................ 89
Overheating, Engine...................... 237
Owner's Manual........................ 324Paint Care............................. 281
Paint Damage.......................... 281
Panic Alarm............................ 21
Parking Brake.......................... 194
Passing Light........................... 79
Pedals, Adjustable........................ 84
Placard, Tire and Loading Information......... 207
Polishing and Waxing..................... 282
Power
Distribution Center..................... 288
Door Locks........................... 18
Mirrors.............................. 61
Outlet.............................. 115
Seats................................ 65
Steering............................. 266
Sunroof............................. 112
Windows............................. 24
Pregnant Women and Seat Belts.............. 34
Preparation for Jacking.................... 242
338 INDEX