2020 JEEP GRAND CHEROKEE run flat

JACKING AND TIRE
CHANGING
WARNING!
• Do not attempt to change a tire on the
side of the vehicle close to moving traf-
fic. Pull far enough off the road to avoid
the danger of being hit when operating
the jack or changing the wheel.
• Being under a jacked-up vehicle is dan-
gerous. The vehicle could slip off the
jack and fall on you. You could be
crushed. Never put any part of your body
under a vehicle that is on a jack. If you
need to get under a raised vehicle, take
it to a service center where it can be
raised on a lift.
• Never start or run the engine while the
vehicle is on a jack.
• The jack is designed to be used as a tool
for changing tires only. The jack should
not be used to lift the vehicle for service
purposes. The vehicle should be jacked
on a firm level surface only. Avoid ice or
slippery areas.
Run Flat Tires — SRT Models
SRT models are equipped with “run flat”
tires. Run flat tires allow the vehicle to be
driven approximately 50 miles (80 km) at
55 mph (88 km/h). Tire service should be
obtained to avoid prolonged run flat feature
usage.
WARNING!
Do not exceed 50 mph (80 km/h) if the
“Tire Pressure Monitoring Telltale Light” is
illuminated. Vehicle handling and braking
may be reduced. You could have a collision
and be severely or fatally injured.
Jack Location
The scissor-type jack and tire changing tools
are located in the rear cargo area, below the
load floor.
Spare Tire Stowage
The spare tire is stowed under the load floor
in the rear cargo area and is secured to the
body with a special wing nut.
Spare Tire/Jack And Tools
1 — Cap-Less Fuel Fill Funnel
2 — Jack
3 — Tire Changing Tools
4 — Spare Tire
217

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

Towing ConditionWheels OFF The
GroundTwo-Wheel Drive ModelsFour-Wheel Drive
Models Without
4WD LOW RangeFour-Wheel Drive Models With 4WD LOW
Range
Flat Tow NONEIf transmission is operable:
•
Transmission in NEUTRAL
• 30 mph (48 km/h) max speed
• 30 miles (48 km) max distanceNOT ALLOWEDSee instructions in “Recreational Towing”
•
Transmission in PARK
• Transfer case in NEUTRAL (N)
• Tow in forward direction
• Ignition in ACC or ON/RUN mode (or
disconnect negative battery cable)
Wheel Lift Or Dolly
To wFrontNOT ALLOWED NOT ALLOWED
Rear OKNOT ALLOWED NOT ALLOWED
On Trailer ALL BEST METHOD OK BEST METHOD
Proper towing or lifting equipment is required
to prevent damage to your vehicle. Use only
tow bars and other equipment designed for
this purpose, following equipment manufac-
turer’s instructions. Use of safety chains is
mandatory. Attach a tow bar or other towing
device to main structural members of the
vehicle, not to bumpers or associated brack-
ets. State and local laws regarding vehicles
under tow must be observed.
If you must use the accessories (wipers, de-
frosters, etc.) while being towed, the ignition
must be in the ON/RUN mode, not the ACC
mode.If the vehicle's battery is discharged, refer to
“Manual Park Release” in this section for
instructions on shifting the transmission out
of PARK for towing.
CAUTION!
• Do not use sling type equipment when
towing. Vehicle damage may occur.
• When securing the vehicle to a flat bed
truck, do not attach to front or rear
suspension components. Damage to
your vehicle may result from improper
towing.
CAUTION!
• If the vehicle being towed requires steer-
ing, the ignition switch must be in the
ACC or ON/RUN mode, not in the LOCK/
OFF mode.
NOTE:
SRT vehicles and 4WD models without 4WD
LOW range should only be towed with all four
wheelsOFFthe ground.
IN CASE OF EMERGENCY
232

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

WARNING!
Overloading of your tires is dangerous.
Overloading can cause tire failure, affect
vehicle handling, and increase your stop-
ping distance. Use tires of the recom-
mended load capacity for your vehicle.
Never overload them.
Radial Ply Tires
WARNING!
Combining radial ply tires with other types
of tires on your vehicle will cause your
vehicle to handle poorly. The instability
could cause a collision. Always use radial
ply tires in sets of four. Never combine
them with other types of tires.
Tire Repair
If your tire becomes damaged, it may be
repaired if it meets the following criteria:
• The tire has not been driven on when flat.
• The damage is only on the tread section of
your tire (sidewall damage is not repair-
able).• The puncture is no greater thana¼ofan
inch (6 mm).
Consult an authorized tire dealer for tire re-
pairs and additional information.
Damaged Run Flat tires, or Run Flat tires that
have experienced a loss of pressure should be
replaced immediately with another Run Flat
tire of identical size and service description
(Load Index and Speed Symbol). Replace the
tire pressure sensor as well as it is not de-
signed to be reused.Run Flat Tires — If Equipped
Run Flat tires allow you the capability to drive
50 miles (80 km) at 50 mph (80 km/h) after
a rapid loss of inflation pressure. This rapid
loss of inflation is referred to as the Run Flat
mode. A Run Flat mode occurs when the tire
inflation pressure is of/or below 14 psi
(96 kPa). Once a Run Flat tire reaches the
run flat mode it has limited driving capabili-
ties and needs to be replaced immediately. A
Run Flat tire is not repairable. When a run flat
tire is changed after driving with underin-flated tire condition, please replace the TPM
sensor as it is not designed to be reused when
driven under run flat mode (14 psi (96 kPa))
condition.
NOTE:
TPM Sensor must be replaced after driving
the vehicle on a flat tire condition.
It is not recommended driving a vehicle
loaded at full capacity or to tow a trailer while
a tire is in the run flat mode.
See the tire pressure monitoring section for
more information.Tire Spinning
When stuck in mud, sand, snow, or ice con-
ditions, do not spin your vehicle's wheels
above 30 mph (48 km/h) or for longer than
30 seconds continuously without stopping.
Refer to “Freeing A Stuck Vehicle” in “In
Case Of Emergency” for further information.
WARNING!
Fast spinning tires can be dangerous.
Forces generated by excessive wheel
265

Break-In Recommendations, New
Vehicle...............152, 153
Bulb Replacement.............204
Bulbs, Light.................143
Camera, Rear................184
Capacities, Fluid...........290, 291
Caps, Filler
Fuel....................228
Oil (Engine)...............248
Carbon Monoxide Warning.....141, 286
Car Washes..................274
Chains, Tire..............271, 272
Change Oil Indicator.............67
Changing A Flat Tire.........217, 262
Checking Your Vehicle For Safety. . . .140
Checks, Safety................140
Child Restraint................127
Child Restraints
Child Seat Installation.........139
How To Stow An unused ALR Seat
Belt....................139
Clean Air Gasoline.............284
Cleaning
Wheels..................270
Climate Control................43
Automatic.................44Compact Spare Tire.............269
Cooling System...............262
Cooling Capacity.........290, 291
Inspection................262
Selection Of Coolant
(Antifreeze)............290, 291
Cruise Control (Speed Control) . . .172, 174
Cruise Light................82, 84
Customer Assistance............350
Customer Programmable Features. . . .316
Cybersecurity.................300
Daytime Running Lights...........37
Dealer Service................257
Defroster, Windshield............142
Diagnostic System, Onboard........85
Diesel Fuel
.................
.287
Diesel
Fuel Requirements.........287
Dipsticks
Oil (Engine)...............253
Disabled Vehicle Towing..........231
Do Not Disturb............339, 347
Door Ajar.................74, 75
Door Ajar Light..............74, 75
Drag And Drop Menu........302, 308
Driver’s Seat Back Tilt............25DVD Player (Video Entertainment
System)..................322
Economy (Fuel) Mode...........156
Electric Brake Control System.......87
Anti-Lock Brake System.........86
Electronic Roll Mitigation.....89, 92
Electronic Speed Control (Cruise
Control)..................173
Electronic Stability Control (ESC).....89
E
lectronic Throttle Control Warning Light. .74
Emergency, In Case Of
Freeing Vehicle When Stuck.....230
Hazard Warning Flasher........203
Jacking...............217, 262
Jump Starting..............225
Tow Hooks................235
Emissions...................298
Engine.....................248
Break-In Recommendations . .152, 153
Checking Oil Level...........253
Compartment..........248, 249,
250, 251, 252
Compartment Identification . .248, 249,
250, 251, 252
Cooling..................262
Exhaust Gas Caution.......141, 286
INDEX
368