engine JEEP WRANGLER UNLIMITED 2021 Owner handbook (in English)

45
The temperature can be displayed in U.S.
or Metric units by selecting the U.S./
Metric customer-programmable feature.
Refer to the “Uconnect Settings” in
“Multimedia” in the 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 provide proper corrosion protec -
tion and to protect against engine over -
heating. OAT coolant (conforming to
MS.90032) is recommended.
Winter Operation
To ensure the best possible heater and
defroster 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
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 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.
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.
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 instruments,
or abrasive window cleaners on the inte-
rior surface of the window.
Keep all objects a safe distance from the
window.
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57
Power Inverter — If Equipped
There is a 230 Volt, 150 Watt inverter outlet
located on the back of the center console to
convert DC current to AC current.
This outlet can power cellular phones, elec-
tronics and other low power devices requiring
power up to 150 Watts. Certain high-end
video game consoles exceed this power limit,
as will most power tools.
Power Inverter
The power inverter is designed with built-in
overload protection. If the power rating of
150 Watts is exceeded, the power inverter
automatically shuts down. Once the elec -
trical device has been removed from the
outlet, the inverter should automatically
WARNING!
To avoid serious injury or death:
Do not insert any objects into the
receptacles.
Do not touch with wet hands.
Close the lid when not in use.
If this outlet is mishandled, it may cause
an electric shock and failure.
CAUTION!
Do not exceed the maximum power of
160 Watts (13 Amps) at 12 Volts. If the
160 Watt (13 Amp) power rating is
exceeded the fuse protecting the system
will need to be replaced.
Power outlets are designed for accessory
plugs only. Do not insert any other object
in the power outlets as this will damage
the outlet and blow the fuse. Improper
use of the power outlet can cause
damage not covered by your New Vehicle
Limited Warranty.
CAUTION!
Many accessories that can be plugged in
draw power from the vehicle's battery,
even when not in use (i.e., cellular
phones, etc.). Eventually, if plugged in
long enough, the vehicle's battery will
discharge sufficiently to degrade battery
life and/or prevent the engine from
starting.
Accessories that draw higher power (i.e.,
coolers, vacuum cleaners, lights, etc.),
will degrade the battery even more
quickly. Only use these intermittently
and with greater caution.
After the use of high power draw acces-
sories, or long periods of the vehicle not
being started (with accessories still
plugged in), the vehicle must be driven a
sufficient length of time to allow the
alternator to recharge the vehicle's
battery.
Power outlets are designed for accessory
plugs only. Do not hang any type of
accessory or accessory bracket from the
plug. Improper use of the power outlet
can cause damage.
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59
(Continued)

ENVIRONMENTAL PROTECTION
SYSTEMS — IF EQUIPPED

Gasoline Particulate Filter (GPF) — 2.0L T4
Petrol Versions Only
The Gasoline Particulate Filter is a mechan-
ical filter, integral to the exhaust system,
which physically traps carbon particles present in the exhaust gases of 2.0L T4
petrol engines.
The particulate filter is needed to eliminate
almost all carbon particle emissions in
compliance with current/future regulations
and standards.
Since this filter physically traps particulates,
it must be cleaned (regenerated) during
normal driving operation to remove carbon
particles. The regeneration procedure is
controlled automatically by the engine
control unit according to the filter conditions
and car use conditions.
The following may occur during regeneration:
increased levels of noise vibration and
harshness (NVH) and reduced engine
performance.
Dedicated messages can appear in the
instrument cluster display as a result of the
condition of the filter. Refer to the opening
paragraph of the "Warning Lights And
Messages" section for further information.
WARNING!
Cargo must be securely tied down before
driving your vehicle. Improperly secured
loads can fly off the vehicle, particularly
at high speeds, resulting in personal
injury or property damage. Follow the roof
rack cautions when carrying cargo on your
roof rack.
CAUTION!
To avoid damage to the roof rack and
vehicle, do not exceed the maximum roof
rack load capacity. Always distribute
heavy loads as evenly as possible and
secure the load appropriately.
Long loads, which extend over the wind
-
shield, should be secured to both the
front and rear of the vehicle.
Place a blanket or other protection
between the surface of the roof and the
load.
Travel at reduced speeds and turn
corners carefully when carrying large or
heavy loads on the roof rack. Wind
forces, due to natural causes or nearby
truck traffic, can add sudden upward
loads. It is recommended to not carry
large flat loads, such as wood panels or
surfboards, which may result in damage
to the cargo or your vehicle.
Load should always be secured to cross
bars first, with tie down loops used as
additional securing points if needed. Tie
loops are intended as supplementary tie
down points only. Do not use ratcheting
mechanisms with the tie loops. Check
the straps frequently to be sure that the
load remains securely attached.
CAUTION! (Continued)
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61

Push the up arrow button to scroll upward
through the main menus (Speedometer,
mph/km/h, Vehicle Info, Terrain, Driver
Assist, Fuel Economy, Trip A, Trip B, Stop/
Start, Audio, Navigation, Stored Messages,
Screen Setup and Speed Warning).

Push the down arrow button to scroll
downward through the main menu and
submenus (Speedometer, mph/km/h,
Vehicle Info, Terrain, Driver Assist, Fuel
Economy, Trip A, Trip B, Stop/Start,
Audio, Navigation, Stored Messages,
Screen Setup and Speed Warning).
Push the right arrow button to access the
information screens or submenu screens
of a main menu item.
Push the left arrow button to access the
information screens or submenu screens
of a main menu item.

Push the OK button to access/select the
information screens or submenu screens of a
main menu item. Push and hold the OK
button for two seconds to reset displayed/
selected features that can be reset.

Oil Change Indicator System — If
Equipped
Your vehicle is equipped with an engine oil
change indicator system. The “Oil Change
Due” message will display in the instrument
cluster display for five seconds after a single
chime has sounded, to indicate the next
scheduled oil change interval. The engine oil
change indicator system is duty cycle based,
which means the engine oil change interval
may fluctuate, dependent upon your
personal driving style.
Refer to an authorized dealership for an oil
change.
Instrument Cluster Display Selectable
Items
The instrument cluster display can be used
to view the following main menu items:
NOTE:
Depending on the vehicles options, feature
settings may vary.
NOTE:
Refer to “Getting To Know Your Instrument
Panel” in your Owner’s Manual for further
information. • Speedometer • Stop/Start
• Vehicle Info • Audio
• Off-Road • Messages
• Fuel Economy • Screen Setup
• Trip Info • Driver Assistance
— If Equipped
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62
Gear Shift Indicator (GSI) — If Equipped
The Gear Shift Indicator (GSI) system is
enabled on vehicles when automatic trans-
mission is in manual shift mode. The GSI
provides the driver with a visual indication
when the recommended gear shift point has
been reached. This indication notifies the
driver that changing gears will allow a reduc -
tion in fuel consumption. When the up shift
indicator is shown on the instrument cluster
display, the GSI is advising the driver to
engage a higher gear. When the down shift
indicator is shown on the display, the GSI is
advising the driver to engage a lower gear.
The GSI remains illuminated until the driver
changes gear, or the driving conditions
return to a situation where changing gears is
not required to improve fuel consumption.
Diesel Displays
When the appropriate conditions exist, the
following messages display in the instrument
cluster display:
Exhaust Filter Nearing Full Safely Drive at
Consistent Speeds to Clear
Exhaust Filter Full – Power Reduced See
Dealer
Exhaust System Service Required – See
Dealer
Exhaust System – Filter XX% Full Service
Required See Dealer
Exhaust System Regeneration in Process
Continue Driving

Exhaust System – Regeneration Completed

Diesel Particulate Filter (DPF) Messages
This engine meets all required diesel engine
emissions standards. To achieve these emis -
sions standards, your vehicle is equipped
with a state-of-the-art engine and exhaust
system. These systems are seamlessly inte -
grated into your vehicle and managed by the
Powertrain Control Module (PCM). The PCM
manages engine combustion to allow the
exhaust system’s catalyst to trap and burn
Particulate Matter (PM) pollutants, with no
input or interaction on your part.
WARNING!
A hot exhaust system can start a fire if you
park over materials that can burn. Such
materials might be grass or leaves coming
into contact with your exhaust system. Do
not park or operate your vehicle in areas
where your exhaust system can contact
anything that can burn.
CAUTION!
Always drive at a speed appropriate to the
traffic conditions, the weather and traffic
regulations. The engine may be switched
off even if the warning light is on: repeated
interruptions of the regeneration process
could cause an early deterioration of
engine oil. For this reason it is always
advisable to wait for the symbol to go off
before turning off the engine, following the
instructions above. Do not complete the
DPF regeneration process when the vehicle
is stopped.
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63
Fuel System Messages
The following chart contains a list of different messages that may appear in the instrument cluster, depending on different system or fuel
conditions. Use the descriptions to interpret what the message means and determine the best action to take.
Diesel Emissions Additive AdBlue® Warning Messages:
MESSAGE DESCRIPTION
Low Diesel Emissions Additive
AdBlue® Level WarningThe first low level warning will be given at around a 1,490 miles (2,400 km) range, and is determined
according to the current consumption rate. The “AdBlue® Low Level” warning light and message will
display on the instrument panel. The AdBlue® low level warning light will remains lit until the AdBlue®
tank is topped up with at least 1.32 gallons (5 Liters) of AdBlue®.
If the level is not resolved, an additional warning appear whenever a certain threshold is reached until it
will no longer be possible to start the engine.
When 125 miles (200 km) are remaining before the AdBlue® tank is empty, a message will appear on
the instrument panel, accompanied by a buzzer sound. When the range is at zero, the display will show
a dedicated message (if equipped). In this case, the engine will not restart.
It will be possible to restart the engine again as soon as AdBlue® is added; the minimum amount
required is 1.32 gallons (5 Liters). Fill the AdBlue® tank as soon as possible with at least 1.32 gallons
(5 Liters) of AdBlue®. If filling is completed with autonomy tank AdBlue® to zero, it could be possible
to wait two minutes before starting the vehicle.
NOTE:
When the AdBlue® tank is empty, and the vehicle is stopped, it is no longer possible to restart the vehicle
until a minimum of 1.32 gallons (5 Liters) of AdBlue® is added to the AdBlue® tank.
Engine Will Not Restart Service
AdBlue® System See Dealer This message will display if AdBlue® system issue detected is not serviced during the allowed period.
Your engine will not restart unless your vehicle is serviced by an authorized dealer. If the level is not
resolved, an additional warning appear whenever a certain threshold is reached until it will no longer be
possible to start the engine. When 125 miles (200 km) are remaining before the AdBlue® tank is
empty, a message will appear on the instrument panel, accompanied by a buzzer sound.
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GETTING TO KNOW YOUR INSTRUMENT PANEL
64
Engine Will Not Start Service
AdBlue® System See DealerNOTE:
The display may take up to five seconds to update after adding two gallons (7.5 Liters) or more of
AdBlue® to the AdBlue® tank. If you have a fault related to the AdBlue® system, the display may not
update to the new level. See an authorized dealer for service.
AdBlue® freezes at temperatures lower than 12°F (-11°C). If the car stands for a long time at this
temperature, refilling could be difficult. For this reason, it is advised to park the vehicle in a garage
and/or heated environment, and wait for the AdBlue® to return to liquid state before topping up.
Gasoline Particulate Filter (GPF) System Messages — If Equipped:
Exhaust System Service Required The engine control unit has detected an issue with the gasoline particulate filter system. See an
authorized dealer.
Exhaust System Regeneration in
Process Continue Driving The regeneration procedure is controlled automatically by the engine control unit according to the filter
conditions and car use conditions. The following may occur during regeneration: increased levels of
noise vibration and harshness (NVH) and reduced engine performance. The driver should continue
driving normally. This message will continue to appear until regeneration is complete.
Exhaust System Regeneration
Complete The exhaust gas filter regeneration has been completed. This message will briefly appear.
Diesel Emissions Additive AdBlue® Warning Messages:
MESSAGE DESCRIPTION
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66

Vehicles equipped with the Anti-Lock Brake
System (ABS) are also equipped with Electronic
Brake Force Distribution (EBD). In the event of an
EBD failure, the Brake Warning Light will turn on
along with the ABS Light. Immediate repair to the
ABS system is required.

Operation of the Brake Warning Light can be
checked by turning the ignition switch from
the OFF position to the ON/RUN position.
The light should illuminate for approximately
four seconds. The light should then turn off
unless the parking brake is applied or a brake
fault is detected. If the light does not illumi-
nate, have the light inspected by an autho -
rized dealer.
The light also will turn on when the parking
brake is applied with the ignition switch in
the ON/RUN position.
NOTE:
This light shows only that the parking brake
is applied. It does not show the degree of
brake application.
— Battery Charge Warning Light

This warning light will illuminate when the battery
is not charging properly. If it stays on while the
engine is running, there may be a malfunction with the charging system. Contact an authorized
dealer as soon as possible.

This indicates a possible problem with the
electrical system or a related component.
— Door Open Warning Light
This indicator will illuminate when a door is
ajar/open or not fully closed.
NOTE:
If the vehicle is moving, there will also be a
single chime.
— Electric Power Steering Fault Warning
Light
This warning light will turn on when there's a
fault with the Electric Power Steering (EPS)
system. Refer to “Electric Power Steering” in
“Starting And Operating” in the Owner’s
Manual for further information.
— Electronic Throttle Control (ETC)
Warning Light
This warning light will illuminate to indicate
a problem with the Electronic Throttle
Control (ETC) system. If a problem is
detected while the vehicle is running, the
light will either stay on or flash depending on
the nature of the problem. Cycle the ignition
when the vehicle is safely and completely
stopped and the transmission is placed in
the PARK (P) position. The light should turn
off. If the light remains on with the vehicle
running, your vehicle will usually be drive -
able; however, see an authorized dealer for
service as soon as possible.
NOTE:
This light may turn on if the accelerator and
brake pedals are pressed at the same time.

If the light continues to flash when the vehicle is
running, immediate service is required and you
may experience reduced performance, an
elevated/rough idle, or engine stall and your
vehicle may require towing. The light will come on
when the ignition is placed in the ON/RUN or
ACC/ON/RUN position and remain on briefly as a
bulb check. If the light does not come on during
starting, have the system checked by an
authorized dealer.

WARNING!
Continued operation with reduced assist
could pose a safety risk to yourself and
others. Service should be obtained as soon
as possible.
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67
— Engine Coolant Temperature Warning
Light
This warning light warns of an overheated
engine condition. If the engine coolant
temperature is too high, this indicator will
illuminate and a single chime will sound. If
the temperature reaches the upper limit, a
continuous chime will sound for four
minutes or until the engine is able to cool;
whichever comes first.
If the light turns on while driving, safely pull
over and stop the vehicle. If the A/C system
is on, turn it off. Also, shift the transmission
into Park and allow the vehicle to sit idle
(propulsion system active). If the tempera -
ture reading does not return to normal, turn
the engine off immediately and call for
service.
Refer to “If Your Engine Overheats” in “In
Case Of Emergency” for further information.
— Hood Open Warning Light
This indicator will illuminate when the hood
is ajar/open or not fully closed.
NOTE:
If the vehicle is moving, there will also be a
single chime.
— Oil Pressure Warning Light
This warning light will illuminate to indicate
low engine oil pressure. If the light turns on
while driving, stop the vehicle, shut off the
engine as soon as possible, and contact an
authorized dealer. A chime will sound when
this light turns on.
Do not operate the vehicle until the cause is
corrected. This light does not indicate how
much oil is in the engine. The engine oil level
must be checked under the hood.
— Oil Temperature Warning Light
This warning light will illuminate to indicate
the engine oil temperature is high. If the
light turns on while driving, stop the vehicle
and shut off the engine as soon as possible.
Wait for oil temperature to return to normal
levels.
— Seat Belt Reminder Warning Light
This warning light indicates when the driver
or passenger seat belt is unbuckled. When
the ignition is first placed in the ON/RUN or
ACC/ON/RUN position and if the driver’s
seat belt is unbuckled, a chime will sound
and the light will turn on. When driving, if the driver or front passenger seat belt
remains unbuckled, the Seat Belt Reminder
Light will flash or remain on continuously
and a chime will sound.
Refer to “Occupant Restraint Systems” in
“Safety” for further information.
— Rear Seat Belt Reminder Warning Light
— If Equipped
This light indicates when a rear seat belt is
unbuckled in the second row. When the igni -
tion is first placed in the ON/RUN or ACC/
ON/RUN position, and if a seat belt in the
second row is unbuckled, a light corre -
sponding to the specific seat will turn on in
the upper right portion of the instrument
cluster display, momentarily replacing the
configurable corner information. If a second
row seat belt that was buckled at the start of
the trip is unbuckled, the Rear Seat Belt
Reminder Light will change from green to red
and a single chime will sound.
Refer to “Occupant Restraint Systems” in
“Safety” for further information.
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GETTING TO KNOW YOUR INSTRUMENT PANEL
68
— Swing Gate Open Warning Light
This warning light will illuminate when the
swing gate is open.
NOTE:
If the vehicle is moving, there will also be a
single chime.
— Transmission Temperature Warning
Light — If Equipped
This warning light will illuminate to warn of
a high transmission fluid temperature. This
may occur with strenuous usage such as
trailer towing. If this light turns on, stop the
vehicle and shift the transmission into Park
and allow the vehicle to sit idle (propulsion
system active), until the light turns off. Once
the light turns off, you may continue to drive
normally.
— Vehicle Security Warning Light — If
Equipped
This light will flash at a fast rate for approxi -
mately 15 seconds when the vehicle security
alarm is arming, and then will flash slowly
until the vehicle is disarmed.
Yellow Warning Lights
— Anti-Lock Brake (ABS) Warning Light
This warning light monitors the Anti-Lock
Brake System (ABS). The light will turn on
when the ignition is placed in the ON/RUN or
ACC/ON/RUN position and may stay on for as
long as four seconds.
If the ABS light remains on or turns on while
driving, then the Anti-Lock portion of the
brake system is not functioning and service
is required as soon as possible. However, the conventional brake system will continue to
operate normally, assuming the Brake
Warning Light is not also on.
If the ABS light does not turn on when the
ignition is placed in the ON/RUN or ACC/ON/
RUN position, have the brake system
inspected by an authorized dealer.
— Electronic Stability Control (ESC)
Active Warning Light — If Equipped
This warning light will indicate when the
Electronic Stability Control system is Active.
The “ESC Indicator Light” in the instrument
cluster will come on when the ignition is
placed in the ON/RUN or ACC/ON/RUN posi -
tion, and when ESC is activated. It should go
out with the engine running. If the “ESC
Indicator Light” comes on continuously with
the engine running, a malfunction has been
detected in the ESC system. If this warning
light remains on after several ignition cycles,
and the vehicle has been driven several miles
(kilometers) at speeds greater than 30 mph
(48 km/h), see an authorized dealer as soon
as possible to have the problem diagnosed
and corrected.
WARNING!
If you continue operating the vehicle when
the Transmission Temperature Warning
Light is illuminated you could cause the
fluid to boil over, come in contact with hot
engine or exhaust components and cause a
fire.
CAUTION!
Continuous driving with the Transmission
Temperature Warning Light illuminated
will eventually cause severe transmission
damage or transmission failure.
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