2017 JEEP GRAND CHEROKEE overheating

warms up. The blower will increase in speed
and transition into Auto mode.
Manual Operation Override
This system offers a full complement of
manual override features. The AUTO symbol
in the front ATC display will be turned off
when the system is being used in the manual
mode.
NOTE:
The system will not automatically sense the
presence of fog, mist or ice on the wind-
shield. DEFROST mode must be manually
selected to clear the windshield and side
glass.
Operating Tips
NOTE:
Refer to the chart at the end of this section
for suggested control settings for various
weather conditions.
Summer Operation
The engine cooling system must be protected
with a high-quality antifreeze coolant to pro-
vide proper corrosion protection and to pro-
tect against engine overheating. OAT coolant
(conforming to MS.90032) is recommended.
Winter Operation
To ensure the best possible heater and de-
froster performance, make sure the engine
cooling system is functioning properly and
the proper amount, type, and concentration
of coolant is used. Use of the air Recircula-
tion mode during Winter months is not rec-
ommended, because it may cause window
fogging.
Vacation/Storage
Before you store your vehicle, or keep it out of
service (i.e., vacation) for two weeks or more,
run the air conditioning system at idle for
about five minutes, in fresh air with the
blower setting on high. This will ensure ad-
equate system lubrication to minimize the
possibility of compressor damage when the
system is started again.
Window Fogging
Vehicle windows tend to fog on the inside in
mild, rainy and/or humid weather. To clear
the windows, select Defrost or Mix mode and
increase the front blower speed. Do not use
the Recirculation mode without A/C for long
periods, as fogging may occur.
Outside Air Intake
Make sure the air intake, located directly in
front of the windshield, is free of obstructions
such as leaves. Leaves collected in the air
intake may reduce airflow, and if they enter
the plenum, they could plug the water drains.
In winter months, make sure the air intake is
clear of ice, slush, and snow.
Cabin Air Filter
The climate control system filters out dust
and pollen from the air. Contact your autho-
rized dealer to service your cabin air filter,
and to have it replaced when needed.
51

The starter is allowed to crank for up to
30-second intervals. Waiting a few minutes
between such intervals will protect the starter
from overheating.
WARNING!
• Before exiting a vehicle, always shift theautomatic transmission into PARK and
apply the parking brake. Always make
sure the keyless ignition node is in the
“OFF” mode, remove the key fob from
the vehicle and lock the vehicle.
• Never leave children alone in a vehicle,
or with access to an unlocked vehicle.
Leaving children in a vehicle unattended
is dangerous for a number of reasons. A
child or others could be seriously or
fatally injured. Children should be
warned not to touch the parking brake,
brake pedal or the gear selector.
• Do not leave the key fob in or near the
vehicle, or in a location accessible to
children, and do not leave the ignition of
a vehicle equipped with Keyless Enter-
N-Go in the ACC or ON/RUN mode. A
WARNING!
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.
NOTE:
Engine start up in very low ambient tempera-
ture could result in evident white smoke. This
condition will disappear as the engine warms
up.
CAUTION!
• The engine is allowed to crank as long as 30 seconds. If the engine fails to start
during this period, please wait at least
two minutes for the starter to cool before
repeating start procedure.
• If the “Water in Fuel Indicator Light”
remains on, DO NOT START engine be-
fore you drain the water from the fuel
filters to avoid engine damage. Refer to
“Draining Fuel/Water Separator Filter”
CAUTION!
in “Servicing And Maintenance” for fur-
ther information.
Automatic Transmission
Start the engine with the transmission gear
selector in the PARK position. Apply the
brake before shifting to any driving range.
Extreme Cold Weather
The engine block heater is a resistance heater
installed in the water jacket of the engine. It
requires a 110–115 Volt AC electrical outlet
with a grounded, three-wire extension cord.
Its use is recommended for environments
that routinely fall below -10°F (-23°C). It
should be used when the vehicle has not been
running overnight or longer periods and
should be plugged in two hours prior to start.
Its use is required for cold starts with tem-
peratures under -20°F (-28°C).
151

REFUELING IN EMERGENCY
The funnel for the Cap-Less Fuel System is
located in the spare tire storage area. If your
vehicle is out of fuel and an auxiliary fuel can
is needed, insert the funnel into the filler
neck and proceed to fill the vehicle.
For more information on the Cap-Less Fuel
System refer to “Refueling The Vehicle” in
“Starting And Operating ” in this manual.
IF YOUR ENGINE
OVERHEATS
In any of the following situations, you can
reduce the potential for overheating by taking
the appropriate action.
• On the highways — slow down.
• In city traffic — while stopped, place thetransmission in NEUTRAL, but do not in-
crease the engine idle speed while prevent-
ing vehicle motion with the brakes. 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 en-
gine 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 to high. This
allows the heater core to act as a supple-
ment to the radiator and aids in removing
heat from the engine cooling system.WARNING!
You or others can be badly burned by hot
engine coolant (antifreeze) or steam from
your radiator. If you see or hear steam
coming from under the hood, do not open
the hood until the radiator has had time to
cool. Never try to open a cooling system
pressure cap when the radiator or coolant
bottle is hot.
CAUTION!
Driving with a hot cooling system could
damage your vehicle. If the temperature
gauge reads HOT (H), 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 HOT (H), and you hear
continuous chimes, turn the engine off
immediately and call for service.
MANUAL PARK RELEASE
WARNING!
Always secure your vehicle by fully apply-
ing the parking brake, before activating
the Manual Park Release. Activating the
Manual Park Release will allow your ve-
hicle to roll away if it is not secured by the
parking brake or by proper connection to a
tow vehicle. Activating the Manual Park
Release on an unsecured vehicle could
lead to serious injury or death for those in
or around the vehicle.
IN CASE OF EMERGENCY
224

FREEING A STUCK VEHICLE
If your vehicle becomes stuck in mud, sand
or snow, it can often be moved using a rock-
ing motion. Turn the steering wheel right and
left to clear the area around the front wheels.
Push and hold the lock button on the gear
selector. Then shift back and forth between
DRIVE and REVERSE while gently pressing
the accelerator.
NOTE:
Shifts between DRIVE and REVERSE can
only be achieved at wheel speeds of 5 mph
(8 km/h) or less. Whenever the transmission
remains in NEUTRAL for more than two sec-
onds, you must press the brake pedal to
engage DRIVE or REVERSE.
Use the least amount of accelerator pedal
pressure that will maintain the rocking mo-
tion without spinning the wheels or racing the
engine.NOTE:
Push the "ESC Off" switch (if necessary), to
place the Electronic Stability Control (ESC)
system in "Partial Off" mode, before rocking
the vehicle. Refer to “Electronic Brake Con-
trol” in “Safety” in the Owners Manual at
www.jeep.com/en/owners/manuals/ for fur-
ther information. Once the vehicle has been
freed, push the "ESC Off" switch again to
restore "ESC On" mode.
WARNING!
Fast spinning tires can be dangerous.
Forces generated by excessive wheel
speeds may cause damage, or even failure,
of the axle and tires. A tire could explode
and injure someone. Do not spin your
vehicle's wheels faster than 30 mph
(48 km/h) or for longer than 30 seconds
continuously without stopping when you
are stuck and do not let anyone near a
spinning wheel, no matter what the speed.
CAUTION!
• Racing the engine or spinning the
wheels may lead to transmission over-
heating and failure. Allow the engine to
idle with the transmission in NEUTRAL
for at least one minute after every five
rocking-motion cycles. This will mini-
mize overheating and reduce the risk of
transmission failure during prolonged
efforts to free a stuck vehicle.
• When “rocking” a stuck vehicle by shift-
ing between DRIVE and REVERSE, do
not spin the wheels faster than 15 mph
(24 km/h), or drivetrain damage may
result.
• Revving the engine or spinning the
wheels too fast may lead to transmission
overheating and failure. It can also dam-
age the tires. Do not spin the wheels
above 30 mph (48 km/h) while in gear
(no transmission shifting occurring).
IN CASE OF EMERGENCY
226

Electronic Throttle Control WarningLight .....................82
Emergency, In Case Of Freeing Vehicle When Stuck .....226
Hazard Warning Flasher ........204
Jacking ..................258
Jump Starting ..............221
Engine ..............244, 246, 247
Block Heater ...............152
Break-In Recommendations .....155
Checking Oil Level ...........248
Compartment . . . .244, 245, 246, 247
Compartment Identification . .244, 245
Coolant (Antifreeze) . . . .277, 280, 281
Cooling ..................257
Exhaust Gas Caution ..........143
Fails To Start ...............150
Flooded, Starting ............150
Identification ..............247
Jump Starting ..............221
Oil ..........276, 277, 280, 281
Oil Filler Cap ..............244
Oil Selection ..............276
Overheating ...............224
Starting .................149
Enhanced Accident Response Feature ...............128, 229 Exhaust Gas Caution
............143
Exhaust System ...............143
Exterior Lights ................145
Filters Air Conditioning ..........51, 252
Engine Oil .........277, 280, 281
Flashers ....................204
Hazard Warning .............204
Turn Signal .........87, 145, 206
Flooded Engine Starting ..........150
Fluid, Brake ..........279, 281, 283
Fluid Capacities ...........276, 277
Fluid

Leaks ..................145
Fluid Level Checks Brake ...................249
Folding Rear Seat ...............25
Forward Collision Warning .........105
Four-Way Hazard Flasher ..........204
Four Wheel Drive ...........161, 170
Operation ................161
Systems .................161
Four Wheel Drive Operation ........161
Freeing A Stuck Vehicle ..........226
Front And Rear ParkSense System . . . .180
Front ParkSense System ..........180
Fuel ...................273, 275 Adding
...............186, 188
Additives .................274
Diesel ...............275, 281
Economy Mode .............158
Gasoline .................273
Light ....................86
Materials Added ............274
Octane Rating .......273, 277, 280
Requirements ..............275
Specifications .......275, 277, 280
Tank Capacity ..........276, 277
Fueling .................186, 188
Garage Door Opener (HomeLink) ......62
Gasoline (Fuel) ................273
Hands-Free Phone (Uconnect) ......332
Hazard Warning Flasher ..........204
Headlights Cleaning .................268
Passing ..................38
Washers ..................42
Headlight Washers ..............42
Head Restraints ................29
Heated Mirrors .................36
Hill Descent Control ............100
Hill

Descent Control Indicator ......100
361

Memory Seat..................27
Memory Seats And Radio ..........27
Mirrors .....................34
Electric Powered .............35
Electric Remote .............35
Exterior Folding .............36
Heated ...................36
Rearview ..................34
Monitor, Tire Pressure System .......107
Mopar .....................283
MOPAR Accessories .............283
Multi-Function Control Lever ........37
Navigation ...............328, 344
New Vehicle Break-In Period . . . .155, 156
Occupant Restraints ............111
Octane Rating, Gasoline (Fuel) .............273, 277, 280
Oil, Engine ...........277, 280, 281
Capacity ..............276, 277
Checking .................248
Dipstick .................248
Filter ............277, 280, 281
Pressure Warning Light .........82
Recommendation ............276
Viscosity .................276 Oil Pressure Light
...............82
Onboard Diagnostic System .........89
Operating Precautions ............89
Outlet Power ...................64
Overheating, Engine ............224
Owner's Manual (Operator Manual) . . .357
Paddle Shifters ...............160
ParkSense System, Front And Rear . . .180
ParkSense System, Rear ......179, 180
Passing Light .................38
Personalized Menu Bar ...........318
Pets ......................142
Phone, Hands-Free (Uconnect) ......332
Phone (Pairing) ............332, 340
Phone (Uconnect) .......312, 332, 342
Pinch Protection ...............56
Placard, Tire And Loading Information .261
Power Distribution
Center (Fuses) ......209
Door Locks ................20
Glass Sunroof ...............55
Inverter ..................67
Lift Gate ..................59
Mirrors ...................35
Outlet (Auxiliary Electrical Outlet) . .64 Seats
....................25
Tilt/Telescoping Steering Column . . .32
Windows ..................53
Power Shade Open ....................57
Power Steering Fluid ............283
Pregnant Women And Seat Belts .....117
Preparation For Jacking ..........215
Pretensioners Seat Belts ................117
Purchase Apps Uconnect Access .........296, 346
Quadra-Trac ..............161, 162
Radio .....................342
Presets ...........307, 318, 319
Radio Frequency General Information ...........16
Radio Operation ...............307
Radio Screens ................316
Radio (Sound Systems) ..........307
Rain Sensitive Wiper System ........41
Rear Camera .................185
Rear Cross Path ...............103
Rear ParkSense System . . .179, 180, 185
Rear Seat, Folding ..............25
363