2019 JEEP GRAND CHEROKEE LIMITED overheating

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
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 provide proper corrosion
protection and to protect against engine overheating. OAT
coolant (conforming to MS.90032) is recommended.
Winter Operation
To ensure the best possible heater and defroster perfor-
mance, make sure the engine cooling system is functioning
properly and the proper amount, type, and concentration
of coolant is used. Use of the Air Recirculation mode
during Winter months is not recommended, 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 adequate system
lubrication to minimize the possibility of compressor dam-
age 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 De-
frost 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.

3. Press and hold the HomeLink button you want toprogram while you press and hold the hand-held trans-
mitter button.
4. Continue to hold both buttons and observe the indicator light. The HomeLink indicator will flash slowly and
then rapidly after HomeLink has received the frequency
signal from the hand-held transmitter. Release both
buttons after the indicator light changes from slow to
rapid.
5. Press and hold the programmed HomeLink button and observe the indicator light.
• If the indicator light stays on constantly, programming
is complete and the garage door/device should acti-
vate when the HomeLink button is pressed.
• To program the two remaining HomeLink buttons,
repeat each step for each remaining button. DO NOT
erase the channels.
Reprogramming A Single HomeLink Button (Non-
Rolling Code)
To reprogram a channel that has been previously trained,
follow these steps:
1. Cycle the ignition to the ON/RUN position. 2. Press and hold the desired HomeLink button until the
indicator light begins to flash after 20 seconds. Do not
release the button.
3. Without releasing the button, proceed 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 signals
to time-out (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 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. Cycle the ignition to the ON/RUN position.
3
GETTING TO KNOW YOUR VEHICLE 117

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 increase the engine idle speed
while preventing 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.
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.7
IN CASE OF EMERGENCY 425

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 seconds, you must press the brake pedal to
engage DRIVE or REVERSE.
Use the least amount of accelerator pedal pressure that will
maintain the rocking motion without spinning the wheels
or racing the engine.
NOTE: Push the ESC Off switch, to place the Electronic
Stability Control (ESC) system in Partial Offmode, before
rocking the vehicle. Refer to “Electronic Brake Control” in
“Safety” for further information. Once the vehicle has been
freed, push the ESC Offswitch again to restore ESC On
mode.CAUTION!
• Racing the engine or spinning the wheels may lead
to transmission overheating 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 minimize overheating and
reduce the risk of transmission failure during pro-
longed efforts to free a stuck vehicle.
• When “rocking” a stuck vehicle by shifting 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 damage the tires. Do not spin the wheels
above 30 mph (48 km/h) while in gear (no transmis-
sion shifting occurring).
7
IN CASE OF EMERGENCY 429

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 specifications,
should be obtained immediately.
To minimize the possibility of catalytic converter damage:
•Do not interrupt the ignition when the transmission is in
gear and the vehicle is in motion.
• Do not try to start the vehicle by pushing or towing the
vehicle.
• Do not idle the engine with any ignition components
disconnected or removed, such as when diagnostic
testing, or for prolonged periods during very rough idle
or malfunctioning operating conditions.
Cooling System

Tire And Loading Information Placard
This placard tells you important information about the:
1. Number of people that can be carried in the vehicle.
2. Total weight your vehicle can carry.
3. Tire size designed for your vehicle.
4. Cold tire inflation pressures for the front, rear, and sparetires.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 result in tire failure.
(Continued)

Fuel Requirements....................... .501
Jump Starting .......................... .421
Oil ........................... .446, 505, 506
Oil Filler Cap ....................... .442, 447
Oil Filter .............................. .448
Oil Reset ............................. .138
Oil Selection ........................ .446, 505
Oil Synthetic ........................... .447
Overheating ........................... .425
Starting ........................... .253, 254
Engine Oil Viscosity .....................446, 447
Engine Oil Viscosity Chart .................446, 447
Enhanced Accident Response Feature .........222, 433
Ethanol ................................. .502
Exhaust Gas Cautions ................... .245, 504
Exhaust System ....................... .245, 460
Exterior Lights ......................... .71, 248
Filters Air Cleaner ............................ .448
Air Conditioning .................. .95, 448, 451
Engine Oil ......................... .448, 506
Engine Oil Disposal .......................448
Flashers ................................ .392
Hazard Warning ........................ .392Turn Signals
.....................160, 248, 401
Flash-To-Pass ..............................73
Flooded Engine Starting ..................... .257
Fluid, Brake ............................. .508
Fluid Capacities ........................... .505
Fluid Leaks .............................. .248
Fluid Level Checks Brake ................................ .467
Fluids And Lubricants .......................506
Fog Lights ................................75
Fold-Flat Seats .............................43
Forward Collision Warning ....................189
Four-Way Hazard Flasher .....................392
Four Wheel

Drive .......................273, 285
Operation ............................. .273
System ............................... .273
Four Wheel Drive Operation ..................273
Freeing A Stuck Vehicle ..................... .428
Front Axle (Differential) ..................... .469
Fuel ................................... .501
Adding .............................. .359
Additives ............................. .502
Clean Air ............................. .502
Economy Mode ......................... .264
Ethanol .............................. .502
612 INDEX

Overheating, Engine....................... .425
Paddle Shifters ........................... .270
Paint Care ............................... .492
Parking Brake ............................ .260
ParkSense Active Park Assist ..................332
ParkSense System, Rear .................. .313, 322
Passive Entry ..............................37
Personalized Main Menu .....................511
Pets ................................... .244
Pinch Protection ....................... .101, 105
Placard, Tire And Loading Information ...........476
Power Brakes ............................... .499
Distribution Center (Fuses) ..................407
Door Locks ..............................36
Inverter .............................. .129
Mirrors ................................68
Outlet (Auxiliary Electrical Outlet) ............125
Seats ..................................49
Steering .............................. .286
Sunroof ............................ .99, 102
Tilt/Telescoping Steering Column ..............64
Windows ...............................96 Power Seats
Forward ................................49
Rearward ...............................49
Recline .................................50
Pregnant Women And Seat Belts ................207
Preparation For Jacking ..................... .414
Pretensioners Seat Belts ............................. .207
Quadra-Lift .............................. .279
Quadra-Trac ............................. .273
Radial Ply Tires ........................... .480
Radiator Cap (Coolant Pressure Cap) .............465
Radio Frequency General Information ................25, 31, 33, 41
Radio Operation .......................... .581
Radio Remote Controls ..................... .564
Rain Sensitive Wiper System ...................82
Rear Axle (Differential) ..................... .469
Rear Camera ............................. .357
Rear

Cross Path ........................... .186
Rear Cupholders .......................... .124
Rear ParkSense System .................. .313, 322
Rearview Mirror ............................6612
INDEX 617