cooling JEEP GRAND CHEROKEE 2021 Owner handbook (in English)

EVENT DATA RECORDER (EDR)............ 235
SERVICING AND MAINTENANCE
SCHEDULED SERVICING................ 236Scheduled Servicing — Non SRT....... 236
Scheduled Servicing — SRT.......... 240
Scheduled Servicing — Diesel Engine.... 244
ENGINE COMPARTMENT............... 2483.6L Engine.................... 248
5.7L Engine.................... 249
6.2L Supercharged Engine........... 250
6.4L Engine.................... 251
3.0L Diesel Engine............... 252
Checking Oil Level — Gasoline Engine.... 253
Checking Oil Level — 3.0 Diesel Engine . . . 253
Adding Washer Fluid............... 254
Brake System.................. 255
Automatic Transmission............. 256
Maintenance-Free Battery........... 256
DEALER SERVICE................... 257Air Conditioner Maintenance......... 257
Windshield Wiper Blades............ 258
Cooling System.................. 262
RAISING THE VEHICLE................. 262
TIRES.......................... 262
Tires — General Information......... 262
Tire Types..................... 267
Spare Tires — If Equipped........... 268
Wheel And Wheel Trim Care.......... 270
Tire Chains (Traction Devices) — Non-SRT . 271
Tire Chains (Traction Devices) — SRT.... 272
Tire Rotation Recommendations........ 272
STORING THE VEHICLE................ 273
BODYWORK....................... 274
Preserving The Bodywork............ 274
INTERIORS....................... 275Seats And Fabric Parts............. 275
Plastic And Coated Parts............ 276
Leather Parts................... 276
Glass Surfaces.................. 276
TECHNICAL SPECIFICATIONS
IDENTIFICATION DATA................. 277Vehicle Identification Number......... 277
WHEEL AND TIRE TORQUE SPECIFICATIONS.... 278Torque Specifications.............. 278
DIMENSIONS...................... 279
WHEELS........................ 280
WEIGHTS........................ 281
FUEL REQUIREMENTS — GASOLINE ENGINES.... 282
3.6L Engine.................... 282
5.7L Engine.................... 282
6.2L/6.4L Engine................ 283
Methanol..................... 283
Ethanol....................... 283
Reformulated Gasoline............. 284
Do Not Use E-85 In Non-Flex Fuel Vehicles . 284
CNG And LP Fuel System Modifications . . . 284
Materials Added To Fuel............ 284
Fuel Icon Identification Compliant To
EN16942..................... 284
Carbon Monoxide Warnings.......... 286
FUEL REQUIREMENTS – DIESEL ENGINE....... 287Fuel Icon Identification Compliant To
EN16942..................... 287
NON-SRT FLUID CAPACITIES............. 290
SRT FLUID CAPACITIES................ 291FLUIDS AND LUBRICANTS NON-SRT......... 291
Engine....................... 291
Chassis....................... 294
FLUIDS AND LUBRICANTS — SRT.......... 295Engine....................... 295
Chassis....................... 297
FUEL CONSUMPTION AND CO2EMISSIONS..... 298
MOPAR ACCESSORIES................. 298
Authentic Accessories By Mopar........ 298
MULTIMEDIA
CYBERSECURITY................... 300
UCONNECT 4 WITH 7-INCH DISPLAY......... 301
Uconnect 4 At A Glance............ 301
Drag & Drop Menu Bar............. 302
Radio....................... 303
Android Auto — If Equipped.......... 304
Apple CarPlay Integration — If Equipped . . 305
Apps — If Equipped............... 306
UCONNECT 4C/4C NAV WITH 8.4-INCH DISPLAY . . 307Uconnect 4C/4C NAV At A Glance...... 307
Drag & Drop Menu Bar............. 308
Radio....................... 309
Android Auto — If Equipped.......... 310
Apple CarPlay Integration — If Equipped . . 314
Apps — If Equipped............... 316
UCONNECT SETTINGS................. 316
OFF ROAD PAGES — IF EQUIPPED.......... 317
Off Road Pages Status Bar........... 317
Vehicle Dynamics................ 318
Suspension.................... 318
Pitch And Roll.................. 319
Accessory Gauges................ 319
Selec-Terrain — If Equipped.......... 320
9

• 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.
51

WARNING!
In a collision, people riding in these
areas are more likely to be seriously
injured or killed.
• Do not allow people to ride in any area of
your vehicle that is not equipped with
seats and seat belts.
• Be sure everyone in your vehicle is in a
seat and using a seat belt properly.
Exhaust Gas
WARNING!
Exhaust gases can injure or kill. They con-
tain carbon monoxide (CO), which is col-
orless and odorless. Breathing it can make
you unconscious and can eventually poi-
son you. To avoid breathing (CO), follow
these safety tips:
• Do not run the engine in a closed garage
or in confined areas any longer than
needed to move your vehicle in or out of
the area.
WARNING!
• If you are required to drive with the
trunk/liftgate/rear doors open, make sure
that all windows are closed and the cli-
mate control BLOWER switch is set at
high speed. DO NOT use the recircula-
tion mode.
• If it is necessary to sit in a parked vehicle
with the engine running, adjust your
heating or cooling controls to force out-
side air into the vehicle. Set the blower
at high speed.
The best protection against carbon monoxide
entry into the vehicle body is a properly main-
tained engine exhaust system.
Whenever a change is noticed in the sound of
the exhaust system, when exhaust fumes can
be detected inside the vehicle, or when the
underside or rear of the vehicle is damaged,
have a competent mechanic inspect the com-
plete exhaust system and adjacent body ar-
eas for broken, damaged, deteriorated, or
mispositioned parts. Open seams or loose
connections could permit exhaust fumes to
seep into the passenger compartment. Inaddition, inspect the exhaust system each
time the vehicle is raised for lubrication or oil
change. Replace as required.
Safety Checks You Should Make Inside
The Vehicle
Seat Belts
Inspect the seat belt system periodically,
checking for cuts, frays, and loose parts.
Damaged parts must be replaced immedi-
ately. Do not disassemble or modify the sys-
tem.
Front seat belt assemblies must be replaced
after a collision. Rear seat belt assemblies
must be replaced after a collision if they have
been damaged (i.e., bent retractor, torn web-
bing, etc.). If there is any question regarding
seat belt or retractor condition, replace the
seat belt.
Air Bag Warning Light
The Air Bag warning lightwill turn on for
four to eight seconds as a bulb check when
the ignition switch is first turned to ON/RUN.
If the light is either not on during starting,
stays on, or turns on while driving, have the
141

The engine will shut down, the tachometer
will move to the zero position and the Stop/
Start telltale will illuminate indicating you
are in Autostop. Customer settings will be
maintained upon return to an engine running
condition.
Refer to the “Stop/Start System” in the
“Starting And Operating” section located in
your Owner’s Manual for further information.
Possible Reasons The Engine Does Not
Autostop
Prior to engine shut down, the system will
check many safety and comfort conditions to
see if they are fulfilled. Detailed information
about the operation of the Stop/Start system
may be viewed in the instrument cluster dis-
play Stop/Start Screen. In the following situ-
ations, the engine will not stop:
• Driver’s seat belt is not buckled.
• Driver’s door is not closed.
• Battery temperature is too warm or cold.
• Battery charge is low.
• The vehicle is on a steep grade.• Cabin heating or cooling is in process and
an acceptable cabin temperature has not
been achieved.
• HVAC is set to full defrost mode at a high
blower speed.
• HVAC set to MAX A/C.
• Engine has not reached normal operating
temperature.
• The transmission is not in a forward gear.
• Hood is open.
• Vehicle is in 4LO transfer case mode.
• Brake pedal is not pressed with sufficient
pressure.
Other Factors Which Can Inhibit Autostop In-
clude:
• Accelerator pedal input.
• Engine temp too high.
• 5 mph (8 km/h) threshold not achieved
from previous AUTOSTOP.
• Steering angle beyond threshold.
• ACC is on and speed is set.It may be possible for the vehicle to be driven
several times without the STOP/START sys-
tem going into a STOP/START READY state
under more extreme conditions of the items
listed above.
To Start The Engine While In Autostop
Mode
While in a forward gear, the engine will start
when the brake pedal is released or the
throttle pedal is depressed. The transmission
will automatically re-engage upon engine re-
start.
Conditions That Will Cause The Engine To Start
Automatically While In Autostop Mode:
• The transmission selector is moved out of
DRIVE.
• To maintain cabin temperature comfort.
• HVAC is set to full defrost mode.
• HVAC system temperature or fan speed is
manually adjusted.
• Battery voltage drops too low.
• Low brake vacuum (e.g. after several brake
pedal applications).
151

Launch control will be active until the vehicle
reaches 62 mph (100 km/h), at which point
the Electronic Stability Control (ESC) system
will return to its current ESC mode.
Launch control will abort before launch
completion, display “Launch Aborted” in the
cluster under any the following conditions:
• The accelerator pedal is released during
launch.
• The ESC system detects that the vehicle is
no longer moving in a straight line.
• The “ESC OFF” button is pressed to change
the system to another mode.
NOTE:
After launch control has been aborted, ESC
will return to its current ESC mode.
CAUTION!
Do not attempt to shift when the drive
wheels are spinning and do not have trac-
tion. Damage to the transmission may oc-
cur.
Guidelines For Track Use
NOTE:
Because of the extreme conditions encoun-
tered during track use, any damage or wear
associated with track use may not be covered
by warranty.
• If your SRT vehicle is equipped with Drive
Modes they will alter the vehicle’s perfor-
mance in various driving situations. It is
recommended that your vehicle operates in
SPORT or TRACK modes during the track
event.
• Prior to each track event/day, verify all flu-
ids are at the correct levels. Refer to “Fluid
Capacities” in “Technical Specifications”
for further information.
• Prior to each track event, verify the front
and rear brake pads have more than ½ pad
thickness remaining. If the brake pads re-
quire changing, please burnish prior to
track outing at full pace.
NOTE:
Use of DOT 4 brake fluid is suggested for
extended track usage due to increased ther-
mal capacity.• At the conclusion of each track event, it is
recommended that a brake bleed procedure
is performed to maintain the pedal feel and
stopping capability of your Brembo High
Performance brake system.
• It is recommended that each track outing
should end with a minimum of one cool
down lap using minimal braking.
• If equipped with a removable lower front
fascia grille, it is recommended to remove it
for track use during warm/hot weather to
improve cooling airflow to critical pow-
ertrain and cooling system components.
• All SRT vehicles are track tested for
24 hours of endurance, however, it is rec-
ommended that suspension system, brake
system, prop shaft, and ½ shaft boots
should be checked for wear or damage after
every track event.
• Track usage results in increased operating
temperatures of the engine, transmission,
driveline and brake system. This may affect
noise vibrations and harshness (NVH)
countermeasures designed into your ve-
hicle. New components may need to be
installed to return the system to the original
NVH performance.
171

Engine/TransmissionMax. GTW (Gross Trailer Wt.)
— with Trailer BrakeMax. GTW (Gross Trailer Wt.)
— without Trailer BrakeTongue Wt. (See Note)
3.6L Gasoline — Standard Cooling System 3,500 lbs (1,588 kg) 1,653 lbs (750 kg) 174 lbs (79 kg)
3.6L Gasoline — Heavy Duty Cooling System 6,200 lbs (2,812 kg) 1,653 lbs (750 kg) 310 lbs (141 kg)
5.7L Gasoline — Standard Cooling System 5,000 lbs (2,268 kg) 1,653 lbs (750 kg) 250 lbs (113 kg)
5.7L Gasoline — Heavy Duty Cooling System (except
Summit)7,716 lbs (3,500 kg) 1,653 lbs (750 kg) 377 lbs (171 kg)
5.7L Gasoline — Summit Models With Heavy Duty Cool-
ing System6,500 lbs (2,949 kg) 1,653 lbs (750 kg) 377 lbs (171 kg)
3.0L Diesel All Wheel Drive ModelswithoutEngine Start Stop and Diesel Emission Fluid
All models except Summit 7,716 lbs (3,500 kg) 1,653 lbs (750 kg) 386 lbs (175 kg)
Summit Model 6,500 lbs (2,949 kg) 1,653 lbs (750 kg) 324 lbs (147 kg)
3.0L Diesel All Wheel Drive ModelswithEngine Start Stop and Diesel Emission Fluid
All models except Summit and Trailhawk without skid
plate group7,716 lbs (3,500 kg) 1,653 lbs (750 kg) 386 lbs (175 kg)
All models except Summit and Trailhawk with skid plate
group6,500 lbs (2,949 kg) 1,653 lbs (750 kg) 324 lbs (147 kg)
Summit and Trailhawk models 6,500 lbs (2,949 kg) 1,653 lbs (750 kg) 324 lbs (147 kg)
When towing a trailer the technically permissible laden weight may be exceeded by not more than 10% or 220 lbs (100 kg), whichever is lower
provided that the operating speed is restricted to 62 mph (100 km/h) or less.
NOTE:
The trailer tongue weight must be considered as part of the combined weight of occupants and cargo, and should never exceed the weight refer-
enced on the Tire and Loading Information placard. Refer to “Tires” in “Servicing And Maintenance” for further information.
193

Cavity Cartridge Fuse Micro Fuse Description
F03 60 Amp Yellow – Radiator Fan — If Equipped
(*)
F05 40 Amp Green – Compressor for Air Suspension — If Equipped
(*)
F06 40 Amp Green – Anti-lock Brakes/Electronic Stability Control Pump
(*)
F07 30 Amp Pink – Starter Solenoid
(*)
F09 30 Amp Pink – Diesel Fuel Heater (Diesel Engine Only)/Brake Vacuum Pump
(*)
F10 40 Amp Green – Body Controller/Exterior Lighting #2
(*)
F11 30 Amp Pink – Trailer Tow Electric Brake — If Equipped
(*)
F12 40 Amp Green – Body Controller #3/Power Locks
(*)
F13 40 Amp Green – Blower Motor Front
(*)
F14 40 Amp Green – Body Controller #4/Exterior Lighting #1
(*)
F15 40 Amp Green – LTR (Low Temperature Radiator) Engine Cooling Pump — If Equipped
(*)
F17 30 Amp Pink – Headlamp Washer — If Equipped
F19 20 Amp Blue – Headrest Solenoid — If Equipped
F20 30 Amp Pink – Passenger Door Module
211

WARNING!
Do not attempt jump starting if the battery
is frozen. It could rupture or explode and
cause personal injury.
CAUTION!
Do not use a portable battery booster pack
or any other booster source with a system
voltage greater than 12 Volts or damage to
the battery, starter motor, alternator or
electrical system may occur.
NOTE:
When using a portable battery booster pack,
follow the manufacturer's operating instruc-
tions and precautions.
Preparations For Jump Start
The battery in your vehicle is located under
the passenger's front seat. There are remote
terminals located under the hood to assist in
jump starting.WARNING!
• Take care to avoid the radiator cooling
fan whenever the hood is raised. It can
start anytime the ignition switch is ON.
You can be injured by moving fan
blades.
WARNING!
• Remove any metal jewelry such as rings,
watch bands and bracelets that could
make an inadvertent electrical contact.
You could be seriously injured.
• Batteries contain sulfuric acid that can
burn your skin or eyes and generate
hydrogen gas which is flammable and
explosive. Keep open flames or sparks
away from the battery.
NOTE:
Be sure that the disconnected cable ends do
not touch each other, or either vehicle, until
properly connected for jump starting.
1. Apply the parking brake, shift the auto-
matic transmission into PARK and turn
the ignition OFF.
2. Turn off the heater, radio, and all unnec-
essary electrical accessories.
3. Remove the protective cover over the re-
mote positive(+)battery post. Pull up-
ward on the cover to remove it.
Jump Starting Locations
(+) — Remote Positive Post
(-) — Remote Negative Post
IN CASE OF EMERGENCY
226

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

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. In addition, you
should be seated in the driver’s seat with
your foot firmly on the brake pedal when
activating the Manual Park Release. Acti-
vating the Manual Park Release will allow
your vehicle to roll away if it is not secured
by the parking brake, or by proper connec-
tion to a tow vehicle. Activating the
WARNING!
Manual Park Release on an unsecured
vehicle could lead to serious injury or
death for those in or around the vehicle.
In order to move the vehicle in cases where
the transmission will not shift out of PARK
(such as a dead battery), a Manual Park
Release is available.
Follow these steps to use the Manual Park
Release:
1. Firmly apply the parking brake.
2. Open the center console and locate the
Manual Park Release cover, remove it by
snapping the cover away from the console
hinges.3. Press and maintain firm pressure on the
brake pedal.
4. Using a screwdriver or similar tool, push
the metal latch in towards the tether
strap.
5. While the metal latch is in the open posi-
tion, pull upward on the tether strap until
the lever clicks and latches in the released
position. The transmission is now out of
PARK and the vehicle can be moved.
Manual Park Release Cover Removed
229