2023 JEEP GRAND CHEROKEE service indicator

118GETTING TO KNOW YOUR INSTRUMENT PANEL
EMISSIONS INSPECTION AND
MAINTENANCE PROGRAMS
In some localities, it may be a legal requirement to
pass an inspection of your vehicle's emissions
control system. Failure to pass could prevent
vehicle registration. For states that require an Inspection and
Maintenance (I/M), this check verifies
the Malfunction Indicator Light (MIL) is
functioning and is not on when the
engine is running, and that the OBD II system is
ready for testing.
Normally, the OBD II system will be ready. The
OBD II system may not be ready if your vehicle was
recently serviced, recently had a depleted battery
or a battery replacement. If the OBD II system
should be determined not ready for the I/M test,
your vehicle may fail the test.
Your vehicle has a simple ignition actuated test,
which you can use prior to going to the test station.
To check if your vehicle's OBD II system is ready,
you must do the following:

1. Cycle the ignition switch to the ON position, but do not crank or start the engine.

NOTE:If you crank or start the engine, you will have to
start this test over.
2. As soon as you cycle the ignition switch to the ON position, you will see the Malfunction
Indicator Light (MIL) symbol come on as part of
a normal bulb check.
3. Approximately 15 seconds later, one of two things will happen:
The MIL will flash for about 10 seconds and
then return to being fully illuminated until
you turn OFF the ignition or start the engine.
This means that your vehicle's OBD II
system is not ready and you should not
proceed to the I/M station.
The MIL will not flash at all and will remain
fully illuminated until you place the ignition
in the off position or start the engine. This
means that your vehicle's OBD II system is
ready and you can proceed to the I/M
station.
If your OBD II system is not ready, you should see
an authorized dealer or repair facility. If your
vehicle was recently serviced or had a battery
failure or replacement, you may need to do nothing
more than drive your vehicle as you normally would
in order for your OBD II system to update. A
recheck with the previously mentioned test routine
may then indicate that the system is now ready.
Regardless of whether your vehicle's OBD II system
is ready or not, if the MIL is illuminated during
normal vehicle operation you should have your
vehicle serviced before going to the I/M station.
The I/M station can fail your vehicle because the
MIL is on with the engine running.
WARNING!
ONLY an authorized service technician should
connect equipment to the OBD II connection
port in order to read the VIN, diagnose, or
service your vehicle.
If unauthorized equipment is connected to the
OBD II connection port, such as a
driver-behavior tracking device, it may:
Be possible that vehicle systems,
including safety related systems, could be
impaired or a loss of vehicle control could
occur that may result in an accident
involving serious injury or death.
Access, or allow others to access, infor -
mation stored in your vehicle systems,
including personal information.

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138STARTING AND OPERATING
AIR SUSPENSION MODES
The Air Suspension system has multiple modes to
protect the system in unique situations:
Tire/Jack Mode
To assist with changing a spare tire, the air
suspension system has a feature which allows the
automatic leveling to be disabled Ú page 204.
NOTE:This mode is intended to be enabled with the
ignition on.
Auto Entry/Exit Mode
To assist in entering and exiting the vehicle, the air
suspension system has a feature which
automatically lowers the vehicle to Entry/Exit ride
height Úpage 204.
NOTE:This mode is intended to be enabled with the
ignition on. Transport Mode
To assist with flat bed towing, the air suspension
system has a feature which will put the vehicle into
Entry/Exit height and disable the automatic load
leveling system Ú
page 204.
NOTE:This mode is intended to be enabled with the
ignition on.
Suspension Display Messages Mode
The “Suspension Display Messages” setting allows
you to only display suspension warnings
Úpage 204.
NOTE:This mode is intended to be enabled with the
ignition on.
Wheel Alignment Mode
Before performing a wheel alignment this mode
must be enabled Ú page 204.
NOTE:This mode is intended to be enabled with the
ignition on.
If equipped with a touchscreen radio, all enabling/
disabling of air suspension features must be done
through the radio Ú page 204.
INSTRUMENT CLUSTER DISPLAY
M
ESSAGES
When the appropriate conditions exist, a message
will appear in the instrument cluster Ú page 98.
OPERATION
The indicator lamps 1 through 5 will illuminate to
show the current position of the vehicle. Flashing
indicator lamps will show a position which the
system is working to achieve. When raising, if
multiple indicator lamps are flashing while raising,
the highest flashing indicator lamp is the position
the system is working to achieve. When lowering, if
multiple indicators are flashing while lowering, the
lowest solid indicator lamp is the position the
system is working to achieve.
Toggle up once will move the suspension one
position higher from the current position,
assuming all conditions are met (i.e. ignition on,
speed below threshold, etc). Toggle up can be
pushed multiple times. Each toggle up will raise
the requested level by one position up to a
maximum position of OR2 or the highest position
allowed based on current conditions (i.e. vehicle
speed, etc).
Toggle down once will move the suspension one
position lower from the current level, assuming all
conditions are met (i.e. ignition on, doors closed,
speed below threshold, etc). Toggle down can be
WARNING!
The air suspension system uses a high pressure
volume of air to operate the system. To avoid
personal injury or damage to the system, see an
authorized dealer for service.

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STARTING AND OPERATING139
pushed multiple times. Each toggle down will lower
the requested level by one position down to a
minimum of Entry/Exit Height or the lowest
position allowed based on current conditions (i.e.
vehicle speed, etc.)
Automatic height changes will occur based on
vehicle speed and the current vehicle height. The
indicator lamps and instrument cluster display
messages will operate the same for automatic
changes and user requested changes.
Off-Road 2 (OR2) Ride Height – Indicator lamps
1 through 5 will be illuminated.
Off-Road 1 (OR1) Ride Height – Indicator lamps
2 through 5 will be illuminated.
Normal Ride Height (NRH) – Indicator lamps 3
through 5 will be illuminated.
Aero Ride Height– Indicator lamps 4 and 5 will
be illuminated.
Entry/Exit Ride Height– Indicator lamp 5 will be
illuminated.
Transport Mode – Indicator lamp 5 will be illumi -
nated. Driving above 3 mph (5 km/h) or dese -
lecting setting in the radio will disable Transport
Mode.
Tire/Jack Mode – Indicator lamps 3 through
5 will be illuminated. Driving above 5 mph
(8 km/h) or deselecting setting in the radio will
disable Tire/Jack Mode.
Wheel Alignment Mode – Indicator lamps 3
through 5 will be illuminated. Driving above
5 mph (8 km/h) or deselecting setting in the
radio will disable Wheel Alignment Mode.
FUEL SAVER TECHNOLOGY 5.7L ONLY —
IF EQUIPPED
This feature offers improved fuel economy by
shutting off four of the engine's eight cylinders
during light load and cruise conditions. The system
is automatic with no driver inputs or additional
driving skills required.
NOTE:This system may take some time to return to full
functionality after a battery disconnect.
POWER STEERING
The electric power steering system provides
enhanced vehicle response and increased ease of
maneuverability in tight spaces. The power
steering system adapts to different driving
conditions. If the electric power steering system
experiences a fault that prevents it from providing
assistance, you will still have the ability to steer the
vehicle manually.
NOTE:Alternate electric power steering efforts (Normal,
Comfort and Sport) can be selected through the
Uconnect System Ú page 204. If SPORT mode is
selected, steering efforts are optimized for sporty
driving.
If the Electric Power Steering warning
icon is displayed and the “Service Power
Steering” or the “Power Steering Assist
Off – Service System” message is
displayed within the instrument cluster display,
this indicates the vehicle needs to be taken to the
dealer for service Ú page 108.
NOTE:
Even if the power steering assistance is no
longer operational, it is still possible to steer the
vehicle. Under these conditions there will be a
substantial increase in steering effort, espe -
cially at low speeds and during parking maneu -
vers.
If the condition persists, see an authorized
dealer for service.
WARNING!
Continued operation with reduced assist could
pose a safety risk to yourself and others. Service
should be obtained as soon as possible.
4

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218MULTIMEDIA
Brakes
Greeting Lights When the “Greeting Lights” feature is selected, it enables “Headlight
Illumination On Approach”. When “Headlight Illumination On Approach” is
selected, it allows the adjustment of the amount of time the headlights
remain on after the doors are unlocked with the key fob. “Greeting Lights”
must be selected and “Headlight Illumination On Approach” must be selected
above zero seconds for the feature to be enabled. The available settings are
“On” and “Off”.
Auto Dim High Beams This setting will allow you to turn the Auto Dim High Beams on or off.
Daytime Running Lights This setting will allow you to turn the Daytime Running Lights on or off.
Cornering Lights When this setting is selected, if the steering wheel rotation angle is large or
the turn signal indicators are on, a light (incorporated in the fog light) will turn
on, on the relevant side to improve visibility at night.
Flash Lights With Lock This setting will allow you to turn the flashing of the lights when the Lock
button is pushed on the key fob on or off.
Setting Name
Description
When the Brakes button is pressed on the touchscreen, the system will display settings related to the vehicle’s brake system.
NOTE:Depending on the vehicle’s options, feature settings may vary.
Setting NameDescription
Auto Park Brake This setting will turn the Auto Park Brake on or off.
Brake Service This setting will allow you to set the brakes for service. When the setting is
selected, a pop-up will display with “Yes” and “No” options.

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322IN CASE OF EMERGENCY
NOTE:In certain cold conditions, ice may prevent the fuel
door from opening. If this occurs, lightly push
around the perimeter of the fuel door to break the
ice build up. Re-release the fuel door by pushing on
the rear outer edge near the center to unlatch. Do
not pry on the door.
Emergency Gas Can Refueling
Most gas cans will not open the flapper doors. A
funnel is provided to allow emergency refueling
with a gas can.
See the following steps for refueling:

1. Retrieve funnel from under the rear cargo
load floor.

2. Insert funnel into same filler pipe opening as the fuel nozzle.

Inserting Funnel
3. Ensure funnel is inserted fully to hold flapper
doors open.
4. Pour fuel into funnel opening.
5. Remove funnel from filler pipe, clean off prior to putting back in the spare tire storage area.
6. Close the fuel door making sure the latch is engaged by pushing on the rear outer edge
near the center.IF YOUR ENGINE OVERHEATS
If the vehicle is overheating, it will need to be
serviced by an authorized dealer.
Potential signs of vehicle overheating:
Temperature gauge is at HOT (H)
Strong smell of coolant
White smoke coming from engine or exhaust
Coolant bottle coolant has bubbles present
CAUTION!
To avoid fuel spillage and overfilling, do not “top
off” the fuel tank after filling.
WARNING!
Never have any smoking materials lit in or
near the vehicle when the fuel door is open or
the tank is being filled.
Never add fuel when the engine is running.
This is in violation of most state and federal
fire regulations and may cause the Malfunc -
tion Indicator Light to turn on.
A fire may result if fuel is pumped into a
portable container that is inside of a vehicle.
You could be burned. Always place fuel
containers on the ground while filling.
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.

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330
SERVICING AND MAINTENANCE
SCHEDULED SERVICING
Your vehicle is equipped with an automatic oil
change indicator system. The oil change indicator
system will remind you that it is time to take your
vehicle in for scheduled maintenance.
Based on engine operation conditions, the oil
change indicator message will illuminate. This
means that service is required for your vehicle.
Operating conditions such as frequent short-trips,
trailer tow, extremely hot or cold ambient
temperatures, and E85 fuel usage will influence
when the “Oil Change Required” message is
displayed. Have your vehicle serviced as soon as
possible, within the next 500 miles (805 km).An authorized dealer will reset the oil change
indicator message after completing the scheduled
oil change.
NOTE:Under no circumstances should oil change
intervals exceed 10,000 miles (16,000 km),
12 months or 350 hours of engine run time,
whichever comes first. The 350 hours of engine
run or idle time is generally only a concern for fleet
customers.
Once A Month Or Before A Long Trip:
Check engine oil level.
Check windshield washer fluid level.
Check the tire inflation pressures and look for
unusual wear or damage.
Check the fluid levels of the coolant reservoir,
brake master cylinder and fill as needed.
Check function of all interior and exterior lights.

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SERVICING AND MAINTENANCE339
NOTE:Hemi engines at times can tick right after startup
and then quiet down after approximately 30
seconds. This is normal and will not harm the
engine. This characteristic can be caused by short
drive cycles. For example, if the vehicle is started
then shut off after driving a short distance. Upon
restarting, you may experience a ticking sound.
Other causes could be if the vehicle is unused for
an extended period of time, incorrect oil, extended
oil changes or extended idling. If the engine
continues to tick or if the Malfunction Indicator
Light (MIL) comes on, see the nearest authorized
dealer.
American Petroleum Institute (API)
Approved Engine Oil
These symbols mean that the oil has been certified
by the API. The manufacturer only recommends API
trademark oils.
The API Starburst trademark certifies
0W-20, 0W-30 and 5W-30 engine oils.
The API Donut trademark certifies 0W-40
and 5W-40 engine oil.
Synthetic Engine Oils
Your engine was designed for synthetic engine oils,
only use synthetic API approved engine oils.
Synthetic engine oils which do not have both the
correct API trademark and the correct SAE viscosity
grade numbers should not be used.
Materials Added To Engine Oil
The manufacturer strongly recommends against
the addition of any additives (other than leak
detection dyes) to the engine oil. Engine oil is an
engineered product and its performance may be
impaired by supplemental additives.
Disposing Of Used Engine Oil And Oil
Filters
Care should be taken in disposing of used engine
oil and oil filters from your vehicle. Used oil and oil
filters, indiscriminately discarded, can present a
problem to the environment. Contact an
authorized dealer, service station or governmental
agency for advice on how and where used oil and
oil filters can be safely discarded in your area.
ENGINE OIL FILTER
The engine oil filter should be replaced with a new
filter at every engine oil change.
Engine Oil Filter Selection
A full-flow type disposable oil filter should be used
for replacement. The quality of replacement filters
varies considerably. Only high quality Mopar®
filters should be used. If a Mopar® Engine Oil Filter
is unavailable only use filters that meet or exceed
SAE/USCAR-36 Filter Performance Requirements.
ENGINE AIR CLEANER FILTER
For the proper maintenance intervals Úpage 331.
CAUTION!
Do not use chemical flushes in your engine oil as
the chemicals can damage your engine. Such
damage is not covered by the New Vehicle
Limited Warranty.
WARNING!
The air induction system (air cleaner, hoses,
etc.) can provide a measure of protection in the
case of engine backfire. Do not remove the air
induction system (air cleaner, hoses, etc.) unless
such removal is necessary for repair or
maintenance. Make sure that no one is near the
engine compartment before starting the vehicle
with the air induction system (air cleaner, hoses,
etc.) removed. Failure to do so can result in
serious personal injury.
8

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384SERVICING AND MAINTENANCE
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
capabilities and needs to be replaced immediately.
A Run Flat tire is not repairable. When a Run Flat
tire is changed after being driven in a Run Flat
mode 14 psi (96 kPa) condition, please replace the
TPMS sensor as it is not designed to be reused.
NOTE:TPMS 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 System section
for more information Úpage 264.
Tire Spinning
When stuck in mud, sand, snow, or ice conditions,
do not spin your vehicle's wheels above 30 mph
(48 km/h) or for longer than 30 seconds
continuously without stopping.
For further information Ú page 325.
Tread Wear Indicators
Tread wear indicators are in the original equipment
tires to help you in determining when your tires
should be replaced.

Tire Tread
These indicators are molded into the bottom of the
tread grooves. They will appear as bands when the
tread depth becomes 1/16 of an inch (1.6 mm).
When the tread is worn to the tread wear
indicators, the tire should be replaced.
For further information Ú
page 385.
Life Of Tire
The service life of a tire is dependent upon varying
factors including, but not limited to:
Driving style
Tire pressure - Improper cold tire inflation pres -
sures can cause uneven wear patterns to
develop across the tire tread. These abnormal
wear patterns will reduce tread life, resulting in
the need for earlier tire replacement.
Distance driven
Performance tires, tires with a speed rating of V
or higher, and Summer tires typically have a
reduced tread life. Rotation of these tires per
the vehicle scheduled maintenance is highly
recommended.
WARNING!
Fast spinning tires can be dangerous. Forces
generated by excessive wheel speeds may
cause tire damage or failure. A tire could
explode and injure someone. Do not spin your
vehicle's wheels faster than 30 mph (48 km/h)
for more than 30 seconds continuously when
you are stuck, and do not let anyone near a
spinning wheel, no matter what the speed.
1 — Tread Wear Indicators
WARNING!

Tires and the spare tire should be replaced after
six years, regardless of the remaining tread.
Failure to follow this warning can result in sudden
tire failure. You could lose control and have a
collision resulting in serious injury or death.

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