2023 JEEP GRAND CHEROKEE diff

SAFETY267
Service TPMS Warning
The Tire Pressure Monitoring System Warning Light
will flash on and off for 75 seconds, and remain on
solid when a system fault is detected. The system
fault will also sound a chime. The instrument
cluster display will display a “SERVICE TPM
SYSTEM” message for a minimum of five seconds.
This message is then followed by a graphic display,
with “--“ in place of the pressure value(s),
indicating which Tire Pressure Monitoring System
sensor(s) is not being received.
If the ignition switch is cycled, this sequence will
repeat, providing the system fault still exists. If the
system fault no longer exists, the Tire Pressure
Monitoring System Warning Light will no longer
flash, the "SERVICE TPM SYSTEM" message will
not be present, and a pressure value will be
displayed instead of dashes. A system fault can
occur by any of the following:
Jamming due to electronic devices or driving
next to facilities emitting the same radio
frequencies as the TPMS sensors.
Lots of snow or ice around the wheels or wheel
housings.
Using tire chains on the vehicle.
Using wheels/tires not equipped with TPMS
sensors.
NOTE:A TPMS sensor is not offered on any size spare tire.
In either option of having a full size spare equipped
or not, the tire pressure is not monitored or
displayed on the cluster for the corresponding
spare tire location. If you install the spare tire in
place of a road tire that has a pressure below the
low-pressure warning limit, upon the next ignition
switch cycle, the Tire Pressure Monitoring System
Warning Light will remain on, a chime will sound,
and the instrument cluster display will still display
a pressure value in the different color graphic
display and an “Inflate to XX” message will be
displayed. After driving the vehicle for up to
20 minutes above 15 mph (24 km/h), the Tire
Pressure Monitoring System Warning Light will
flash on and off for 75 seconds and then remain on
solid. In addition, the instrument cluster display
will display a “SERVICE TPM SYSTEM" message for
five seconds and then display dashes (--) in place
of the pressure value. For each subsequent
ignition switch cycle, a chime will sound, the Tire
Pressure Monitoring System Warning Light will
flash on and off for 75 seconds and then remain on
solid, and the instrument cluster display will
display a "SERVICE TPM SYSTEM" message for five
seconds and then display dashes (--) in place of the
pressure value. Once you repair or replace the
original road tire, and reinstall it on the vehicle in
place of the spare tire, the TPMS will update auto -
matically. In addition, the Tire Pressure Monitoring System
Warning Light will turn off and the graphic in the
instrument cluster display will display a new
pressure value instead of dashes (--), as long as no
tire pressure is below the low-pressure warning
limit in any of the four active road tires. The vehicle
may need to be driven for up to 20 minutes above
15 mph (24 km/h) in order for the TPMS to receive
this information.
TPMS Deactivation — If Equipped
The Tire Pressure Monitoring System (TPMS) can
be deactivated by replacing all four wheel and tire
assemblies (road tires) with wheel and tire
assemblies that do not have TPMS sensors, such
as when installing winter wheel and tire
assemblies on your vehicle.
To deactivate the TPMS, first, replace all four wheel
and tire assemblies (road tires) with tires not
equipped with Tire Pressure Monitoring System
sensors. Then, drive the vehicle for 20 minutes
above 15 mph (24 km/h). The TPMS will chime,
the TPMS Warning Light will flash on and off for 75
seconds and then remain on. The instrument
cluster will display the “SERVICE TPM SYSTEM”
message and then display dashes (--) in place of
the pressure values.
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274SAFETY
Adjustable Upper Shoulder Belt Anchorage
In the driver and outboard front passenger seats,
the top of the shoulder belt can be adjusted
upward or downward to position the seat belt away
from your neck. Push or squeeze the anchorage
button to release the anchorage, and move it up or
down to the position that serves you best.

Adjustable Upper Anchorage

As a guide, if you are shorter than average, you will
prefer the shoulder belt anchorage in a lower
position, and if you are taller than average, you will
prefer the shoulder belt anchorage in a higher
position. After you release the anchorage button,
try to move it up or down to make sure that it is
locked in position.
NOTE:The adjustable upper shoulder belt anchorage is
equipped with an Easy Up feature. This feature
allows the shoulder belt anchorage to be adjusted
in the upward position without pushing or
squeezing the release button. To verify the
shoulder belt anchorage is latched, pull downward
on the shoulder belt anchorage until it is locked
into position.Seat Belt Extender
If a seat belt is not long enough to fit properly, even
when the webbing is fully extended and the
adjustable upper shoulder belt anchorage (if
equipped) is in its lowest position, an authorized
dealer can provide you with a Seat Belt Extender.
The Seat Belt Extender should be used only if the
existing seat belt is not long enough. When the
Seat Belt Extender is not required for a different
occupant, it must be removed.
WARNING!
Wearing your seat belt incorrectly could make
your injuries in a collision much worse. You
might suffer internal injuries, or you could
even slide out of the seat belt. Follow these
instructions to wear your seat belt safely and
to keep your passengers safe, too.
Position the shoulder belt across the shoulder
and chest with minimal, if any slack so that it
is comfortable and not resting on your neck.
The retractor will withdraw any slack in the
shoulder belt.
Misadjustment of the seat belt could reduce
the effectiveness of the safety belt in a crash.
Always make all seat belt height adjustments
when the vehicle is stationary.
WARNING!
ONLY use a Seat Belt Extender if it is physically
required in order to properly fit the original
seat belt system. DO NOT USE the Seat Belt
Extender if, when worn, the distance between
the front edge of the Seat Belt Extender
buckle and the center of the occupant’s body
is LESS than 6 inches.
Using a Seat Belt Extender when not needed
can increase the risk of serious injury or death
in a collision. Only use the Seat Belt Extender
when the lap belt is not long enough and only
use in the recommended seating positions.
Remove and store the Seat Belt Extender
when not needed.

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282SAFETY
Examples of improper front passenger seating
include:
The front passenger’s weight is transferred to
another part of the vehicle (like the door, arm
rest or instrument panel).
The front passenger leans forward, sideways, or
turns to face the rear of the vehicle.
The front passenger’s seatback is not in the full
upright position.
The front passenger carries or holds an object
while seated (e.g., backpack, box, etc.).
Objects are lodged under the front passenger
seat.
Objects are lodged between the front passenger
seat and center console.
Accessories that may change the seated weight
on the front passenger seat are attached to the
front passenger seat.
Anything that may decrease or increase the
front passenger’s seated weight.
The OCS determines the front passenger’s most
probable classification. If an occupant in the front
passenger seat is seated improperly, the occupant
may provide an output signal to the OCS that is
different from the occupant’s properly seated
weight input, for example:
Not Seated Properly
Not Seated Properly
Not Seated Properly
Not Seated Properly

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SAFETY283
The Air Bag Warning Light in the instrument
panel will turn on whenever the OCS is unable to
classify the front passenger seat status. A
malfunction in the OCS may affect the operation of
the air bag system.
If the Air Bag Warning Light does not come on,
or stays on after you start the vehicle, or it comes
on as you drive, take the vehicle to an authorized
dealer for service immediately.
The passenger seat assembly contains critical OCS
components that may affect the Passenger
Advanced Front Air Bag inflation. In order for the
OCS to properly classify the seated weight of a
front seat passenger, the OCS components must
function as designed. Do not make any
modifications to the front passenger seat
components, assembly, or to the seat cover. If the
seat, trim cover, or cushion needs service for any
reason, take the vehicle to an authorized dealer.
Only FCA US LLC approved seat accessories may
be used.
The following requirements must be strictly
followed:
Do not modify the front passenger seat
assembly or components in any way.
Do not use prior or future model year seat
covers or cushions not designated by FCA US
LLC for the specific model being repaired. Always use the correct seat cover and cushion
specified for the vehicle.
Do not replace the seat cover or cushion with an
aftermarket seat cover or cushion.
Do not add a secondary seat cover or mat.
At no time should any Supplemental Restraint
System (SRS) component or SRS related
component or fastener be modified or replaced
with any part except those which are approved
by FCA US LLC.
WARNING!
If a child restraint system, child, small teen
-
ager or adult in the front passenger seat is
seated improperly, the occupant may provide
an output signal to the OCS that is different
from the occupant’s properly seated weight
input. This may result in serious injury or death
in a collision.
Always wear your seat belt and sit properly,
with the seatback in an upright position, your
back against the seatback, sitting upright,
facing forward, in the center of the seat, with
your feet comfortably on or near the floor.
Do not carry or hold any objects (e.g., back -
packs, boxes, etc.) while seated in the front
passenger seat. Holding an object may
provide an output signal to the OCS that is
different than the occupant’s properly seated
weight input, which may result in serious injury
or death in a collision.
Placing an object on the floor under the front
passenger seat may prevent the OCS from
working properly, which may result in serious
injury or death in a collision. Do not place any
objects on the floor under the front passenger
seat.
WARNING!
Unapproved modifications or service proce-
dures to the passenger seat assembly, its
related components, seat cover or cushion
may inadvertently change the air bag deploy -
ment in case of a frontal collision. This could
result in death or serious injury to the front
passenger if the vehicle is involved in a colli -
sion. A modified vehicle may not comply with
required Federal Motor Vehicle Safety Stan -
dards (FMVSS) and/or Canadian Motor
Vehicle Safety Standards (CMVSS).
If it is necessary to modify the air bag system
for persons with disabilities, contact an autho -
rized dealer.
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SAFETY289
NOTE:EDR data are recorded by your vehicle only if a
non-trivial crash situation occurs; no data are
recorded by the EDR under normal driving condi -
tions and no personal data (e.g., name, gender,
age, and crash location) are recorded. However,
other parties, such as law enforcement, could
combine the EDR data with the type of personally
identifying data routinely acquired during a crash
investigation.
To read data recorded by an EDR, special
equipment is required, and access to the vehicle or
the EDR is needed. In addition to the vehicle
manufacturer, other parties, such as law
enforcement, that have the special equipment,
can read the information if they have access to the
vehicle or the EDR.
CHILD RESTRAINTS
Everyone in your vehicle needs to be buckled up at
all times, including babies and children. Every
state in the United States, and every Canadian
province, requires that small children ride in
proper restraint systems. This is the law, and you
can be prosecuted for ignoring it. Children 12 years or younger should ride properly
buckled up in a rear seat, if available. According to
crash statistics, children are safer when properly
restrained in the rear seats rather than in the front.
There are different sizes and types of restraints for
children from newborn size to the child almost
large enough for an adult safety belt. Always check
the child seat Owner’s Manual to make sure you
have the correct seat for your child. Carefully read
and follow all the instructions and warnings in the
child restraint Owner’s Manual and on all the
labels attached to the child restraint.
Before buying any restraint system, make sure that
it has a label certifying that it meets all applicable
Safety Standards. You should also make sure that
you can install it in the vehicle where you will use it.
NOTE:
For additional information, refer to http://
www.nhtsa.gov/parents-and-caregivers or
call: 1–888–327–4236
Canadian residents should refer to Transport
Canada’s website for additional information:
http://www.tc.gc.ca/en/services/road/
child-car-seat-safety.html
WARNING!
In a collision, an unrestrained child can become
a projectile inside the vehicle. The force required
to hold even an infant on your lap could become
so great that you could not hold the child, no
matter how strong you are. The child and others
could be badly injured or killed. Any child riding
in your vehicle should be in a proper restraint for
the child’s size.
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SERVICING AND MAINTENANCE347
Engine Coolant Checks
Check the engine coolant (antifreeze) protection
every 12 months (before the onset of freezing
weather, where applicable). If the engine coolant is
dirty, the system should be drained, flushed, and
refilled with fresh Organic Additive Technology
(OAT) coolant (conforming to MS.90032) by an
authorized dealer. Check the front of the A/C
condenser for any accumulation 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 entire system for leaks. DO
NOT REMOVE THE COOLANT PRESSURE CAP
WHEN THE COOLING SYSTEM IS HOT.
Cooling System — Drain, Flush And Refill
NOTE:Some vehicles require special tools to add coolant
properly. Failure to fill these systems properly
could lead to severe internal engine damage. If any
coolant is needed to be added to the system
please contact an authorized dealer.
If the engine coolant (antifreeze) is dirty or
contains visible sediment, have an authorized
dealer clean and flush with Organic Additive
Technology (OAT) coolant (conforming to
MS.90032).
For the proper maintenance intervals Úpage 331.
Selection Of Coolant
Refer to Engine Fluids And Lubricants
Úpage 401.
NOTE:
Mixing of engine coolant (antifreeze) other than
specified Organic Additive Technology (OAT)
engine coolant, may result in engine damage
and may decrease corrosion protection. OAT
engine coolant is different and should not be
mixed with Hybrid Organic Additive Technology
(HOAT) engine coolant or any “globally compat -
ible” coolant. If a non-OAT engine coolant is
introduced into the cooling system in an emer -
gency, the cooling system will need to be
drained, flushed, and refilled with fresh OAT coolant (conforming to MS.90032), by an autho
-
rized dealer as soon as possible.
Do not use water alone or alcohol-based engine
coolant products. Do not use additional rust
inhibitors or antirust products, as they may not
be compatible with the radiator engine coolant
and may plug the radiator.
This vehicle has not been designed for use with
propylene glycol-based engine coolant. Use of
propylene glycol-based engine coolant is not
recommended.
Some vehicles require special tools to add
coolant properly. Failure to fill these systems
properly could lead to severe internal engine
damage. If any coolant is needed to be added to
the system please contact an authorized dealer.
Adding Coolant
Your vehicle has been built with an improved
engine coolant (OAT coolant conforming to
MS.90032) that allows extended maintenance
intervals. This engine coolant (antifreeze) can be
used up to 10 years or 150,000 miles
(240,000 km) before replacement. To prevent
reducing this extended maintenance period, it is
important to use the same engine coolant (OAT
coolant conforming to MS.90032) throughout the
life of your vehicle.
When working near the radiator cooling fan,
disconnect the fan motor lead or turn the igni -
tion to the OFF position. The fan is tempera -
ture controlled and can start at any time the
ignition is in the ON position.
WARNING!
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SERVICING AND MAINTENANCE371
F53 30 Amp Pink –Electronic Limited Slip Differential
(ELSD) Rear #1
F54 ––Spare
F55 30 Amp Pink –MOD Inverter
F56 30 Amp Pink –Folding Seat Module 3rd Row Feed
#2*
F57 ––Spare
F58 –15 Amp Blue3rd Row Additional USB charge (Only
LT - RT) / Port Pwr USB Console UBS
(CH Only)
F59 ––Spare
F60 ––Spare
F61 ––Spare
F62 –20 Amp YellowModule Seat Heater Frt (Driver)*
F63 30 Amp Pink –Assy Trailer Tow Receptacle B+
F64 ––Spare
F65 ––Spare
F66 20 Amp Blue –MOD Door MUX Passenger Rear -
Smart Motor
Cavity
Cartridge Fuse Micro FuseDescription
* If Equipped
8

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382SERVICING AND MAINTENANCE
(Continued)
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
Fuel Economy
Tread Wear
Ride Comfort and Vehicle Stability
Safety Both underinflation and overinflation affect the
stability of the vehicle and can produce a feeling of
sluggish response or over responsiveness in the
steering.
NOTE:
Unequal tire pressures from side to side may
cause erratic and unpredictable steering
response.
Unequal tire pressure from side to side may
cause the vehicle to drift left or right.Fuel Economy
Underinflated tires will increase tire rolling
resistance resulting in higher fuel consumption.
Tread Wear
Improper cold tire inflation pressures can cause
abnormal wear patterns and reduced tread life,
resulting in the need for earlier tire replacement.
Ride Comfort And Vehicle Stability
Proper tire inflation contributes to a comfortable
ride. Overinflation produces a jarring and
uncomfortable ride.
Tire Inflation Pressures
The proper cold tire inflation pressure is listed on
the driver's side B-pillar or rear edge of the driver's
side door.
NOTE:The recommended pressures may be different for
the front and rear axles.
At least once a month:
Check and adjust tire pressure with a good
quality pocket-type pressure gauge. Do not
make a visual judgment when determining
proper inflation. Tires may look properly inflated
even when they are under-inflated.
Inspect tires for signs of tire wear or visible
damage.
WARNING!
Overloading of your tires is dangerous.
Overloading can cause tire failure, affect vehicle
handling, and increase your stopping distance.
Use tires of the recommended load capacity for
your vehicle. Never overload them.
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.
Overinflated or underinflated tires can affect
vehicle handling and can fail suddenly,
resulting in loss of vehicle control.
Unequal tire pressures can cause steering
problems. You could lose control of your
vehicle.
Unequal tire pressures from one side of the
vehicle to the other can cause the vehicle to
drift to the right or left.
Always drive with each tire inflated to the
recommended cold tire inflation pressure.
WARNING!

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