2019 JEEP GRAND CHEROKEE overheating

• The temperature can be displayed in U.S.
or Metric units by selecting the US/Metric
customer-programmable feature. Refer to
the “Uconnect Settings” in “Multimedia”
in your Owner’s Manual for further
information.
To provide you with maximum comfort in the
Automatic mode during cold start-ups, the
blower fan will remain on low until the engine
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.
Operating Tips
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.
CAUTION!
Failure to follow these cautions can cause
damage to the heating elements:
• Use care when washing the inside of
the rear window. Do not use abrasive
window cleaners on the interior surface
of the window. Use a soft cloth and a
mild washing solution, wiping parallel
to the heating elements. Labels can be
peeled off after soaking with warm
water.
• Do not use scrapers, sharp instru-
ments, or abrasive window cleaners on
the interior surface of the window.
• Keep all objects a safe distance from
the window.
Outside Air Intake
Make sure the air intake, located directly in
front of the windshield, is free of obstruc-
tions, 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.
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NOTE:
In some cases the ParkSense graphic will be
displayed in the instrument cluster. In these
cases, the shifter must be returned to “P” to
select desired gear.
If the driver shifts into PARK while moving, the
vehicle may AutoPark.
AutoPark will engageONLYwhen vehicle
speed is 1.2 MPH (1.9 km/h) or less.
The MESSAGE “Vehicle Speed is Too High to
Shift to P”will be displayed in the instrument
cluster if vehicle speed is above 1.2 MPH
(1.9 km/h).
WARNING!
If vehicle speed is above 1.2 MPH
(1.9 km/h), the transmission will default
to NEUTRAL until the vehicle speed drops
below 1.2 MPH (1.9 km). A vehicle left in
the NEUTRAL position can roll. As an
added precaution, always apply the park-
ing brake when exiting the vehicle.4WD LOW — If Equipped
AutoPark will be disabled when operating the
vehicle in 4WD LOW.
The MESSAGE “AutoPark Disabled” will be
displayed in the instrument cluster.
Additional customer warnings will be given
when both of these conditions are met:
• Vehicle is not in PARK
• Driver’s Door is ajar
The MESSAGE “AutoPark Not Engaged” will
be displayed in the instrument cluster. A
warning chime will continue until you shift
the vehicle into PARK or the Driver’s Door is
closed.
ALWAYS DO A VISUAL CHECKthat your vehicle
is in PARK by looking for the "P" in the
instrument cluster display and on the shifter.
As an added precaution, always apply the
parking brake when exiting the vehicle.
STARTING THE ENGINE —
3.0L DIESEL ENGINE
Before starting your vehicle, adjust your seat,
both inside and outside mirrors, and fasten
your seat belts.
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 come to
a complete stop, then shift the auto-
matic transmission into PARK and apply
the parking brake.
• Always make sure the keyless ignition
node is in the OFF mode, key fob is
removed from the vehicle and vehicle is
locked.
• 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 orSTARTING AND OPERATING
148

3. Disconnect the positive(+)end of the
jumper cable from the positive(+)post of
the booster battery.
4. Disconnect the opposite end of the posi-
tive(+)jumper cable from the remote
positive(+)post of the discharged
vehicle.
5. Reinstall the protective cover over the
remote positive(+)post of the discharged
vehicle.
If frequent jump starting is required to start
your vehicle you should have the battery and
charging system tested at an authorized
dealer.
CAUTION!
Accessories plugged into the vehicle
power outlets draw power from the vehi-
cle’s battery, even when not in use (i.e.,
cellular devices, etc.). Eventually, if
plugged in long enough without engine
operation, the vehicle’s battery will dis-
charge sufficiently to degrade battery life
and/or prevent the engine from starting.
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”.
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 the
transmission 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 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 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.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.
IN CASE OF EMERGENCY
228

WARNING!
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.
CAUTION!
• 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).
TOWING A DISABLED
VEHICLE
This section describes procedures for towing
a disabled vehicle using a commercial towing
service. If the transmission and drivetrain are
operable, disabled vehicles may also be
towed as described under “Recreational Tow-
ing” in the “Starting And Operating” section
of the Owner’s Manual.
NOTE:
Vehicles equipped with Quadra-Lift must be
placed in Transport mode, before tying them
down (from the body) on a trailer or flatbed
truck. Refer to the section on Quadra-Lift for
more information. If the vehicle cannot be
placed in Transport mode (for example, en-
gine will not run), tie-downs should be fas-
tened over the tires using specific tire tie-
down nets. Failure to follow these
instructions may cause fault codes to be set
and/or cause loss of proper tie-down tension.
231

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 open a cooling
system pressure cap when the radiator
or coolant bottle is hot.
• Keep hands, tools, clothing, and jewelry
away from the radiator cooling fan when
the hood is raised. The fan starts auto-
matically and may start at any time,
whether the engine is running or not.
• When working near the radiator cooling
fan, turn the ignition to the OFF mode.
The fan is temperature controlled and
can start at any time the ignition is in the
ON mode.
Engine Coolant Checks
Check the engine coolant (antifreeze) protec-
tion every 12 months (before the onset of
freezing weather, where applicable). If the
engine coolant (antifreeze) is dirty, the sys-
tem should be drained, flushed, and refilled
with fresh OAT coolant (conforming to
MS.90032) by an authorized dealer. Check
the front of the A/C condenser for any accu-
mulation of bugs, leaves, etc. If dirty, clean
by gently spraying water from a garden hose
vertically down the face of the condenser.
Check the engine cooling system hoses for
brittle rubber, cracking, tears, cuts, and
tightness of the connection at the coolant
recovery bottle and radiator. Inspect the en-
tire system for leaks. DO NOT REMOVE THE
COOLANT PRESSURE CAP WHEN THE
COOLING SYSTEM IS HOT.
RAISING THE VEHICLE
In the case where it is necessary to raise the
vehicle, go to an authorized dealer or service
station.
TIRES
Tires — General Information
Tire Pressure
Proper tire inflation pressure is essential to
the safe and satisfactory operation of your
vehicle. Four primary areas are affected by
improper tire pressure:
• Safety and Vehicle Stability
• Economy
• Tread Wear
• Ride Comfort
Safety
WARNING!
• Improperly inflated tires are dangerous
and can cause collisions.
• Underinflation increases tire flexing and
can result in overheating and tire failure.
• Overinflation reduces a tire's ability to
cushion shock. Objects on the road and
chuckholes can cause damage that re-
sult in tire failure.
SERVICING AND MAINTENANCE
262

Fuel Requirements........282, 291
Jump Starting..............225
Oil..................290, 291
Oil Filler Cap...............248
Oil Selection...........290, 291
Overheating...............228
Starting..................145
Enhanced Accident Response
Feature...............125, 235
Ethanol....................283
Exhaust Gas Cautions........141, 286
Exhaust System...............141
Exterior Lights.............36, 143
Filters
Air Conditioning..........52, 258
Flashers....................203
Hazard Warning.............203
Turn Signals.........83, 143, 207
Flash-To-Pass.................38
Fluid, Brake.................297
Fluid Capacities...........290, 291
Fluid Leaks..................143
Fluid Level Checks
Brake...................255
Fluids And Lubricants........291, 295
Fog Lights.................40, 81Fold-Flat Seats................25
Forward Collision Warning.........101
Four-Way Hazard Flasher..........203
Four Wheel Drive...........159, 167
Operation.................159
System..................159
Four Wheel Drive Operation........159
Freeing A Stuck Vehicle..........230
Fuel...................282, 287
Adding...............185, 188
Additives................
.284
Clean
Air .................284
Consumption...............298
Economy Mode.............156
Ethanol..................283
Gasoline.................282
Light....................77
Materials Added.............284
Octane Rating..............282
Requirements.......282, 287, 291
Tank Capacity...........290, 291
Fueling.................185, 188
Fuses.....................210
Gasoline, Clean Air.............284
Gasoline, (Fuel)...............282
Gasoline, Reformulated..........284General Information.............320
Glass Cleaning................276
Hands-Free Phone
Uconnect.................333
Hazard Warning Flashers..........203
Headlights
Delay....................39
High Beam/Low Beam Select
Switch...................38
Lights On Reminder...........40
On With Wipers..............39
Passing...................38
Switch...................36
Head Restraints................30
Head Rests...................30
Heated Seats..................28
Heated Steering Wheel.........33, 34
Hill Descent Control.............94
Hill Descent Control Indicator.......94
Hill Start Assist................88
Hood
Closing...................59
Opening...................59
Hood Prop...................59
Hood Release.................59
369

Monitor, Tire Pressure System.......103
Mopar Accessories.............298
Multi-Function Control Lever........37
Navigation..................328
New Vehicle Break-In Period. . . .152, 153
Occupant Restraints............107
Octane Rating, Gasoline (Fuel)......282
Oil, Engine
Capacity..............290, 291
Checking.................253
Dipstick..................253
Pressure Warning Light.........75
Recommendation.........290, 291
Viscosity..............290, 291
Oil Pressure Light...............75
Onboard Diagnostic System.........85
Operating Precautions............85
Outlet
Power....................62
Overheating, Engine............228
Paddle Shifters...............157
ParkSense Active Park Assist.......180
ParkSense System, Rear......177, 179
Passive Entry..................21Personalized Main Menu......302, 308
Pets......................140
Phone
Pairing..................335
Phonebook..................338
Phone, Hands-Free (Uconnect)......333
Phone (Uconnect)..............333
Pinch Protection.............55, 58
Power
Distribution Center (Fuses)......210
Outlet (Auxiliary Electrical Outlet) . . .62
Sunroof................54, 56
Tilt/Telescoping Steering Column . . .34
Windows..................52
Pregnant Women And Seat Belts.....113
Preparation For Jacking..........218
Pretensioners
Seat Belts
...............
.113
Quadra-Lift..................163
Quadra-T
rac .................159
Radial Ply Tires...............265
Radio
Presets...............303, 309
Radio Operation...........301, 307
Radio Screens.............301, 307Rain Sensitive Wiper System........42
Rear Camera.................184
Rear Cross Path................99
Rear ParkSense System.......177, 179
Rear Wiper/Washer..............43
Recreational Towing.............198
Reformulated Gasoline...........284
Release, Hood.................59
Reminder, Seat Belt............109
Remote Control
Starting System..............17
Remote Keyless Entry............15
Arm The Alarm..............18
Disarm The Alarm.............18
Remote Starting System...........17
Replacement Bulbs.............204
Replacement Keys..............15
Replacement Tires.............266
Restraints, Child...............127
Restraints, Head...............30
Roll Over Warning................2
Roof Luggage Rack..............64
Rotation, Tires................272
Safety Checks Inside Vehicle.......141
Safety Checks Outside Vehicle......143
Safety, Exhaust Gas.............141
371