2018 JEEP WRANGLER UNLIMITED warning lights

HOW TO USE THIS MANUAL
Essential Information
Consult the Table of Contents to determine
which section contains the information you
desire.
Since the specification of your vehicle de-
pends on the items of equipment ordered,
certain descriptions and illustrations may dif-
fer from your vehicle's equipment.
The detailed index at the back of this Owner's
Manual contains a complete listing of all
subjects.
Symbols
Some vehicle components have colored la-
bels whose symbols indicate precautions to
be observed when using this component.
Refer to “Warning Lights and Messages” in
“Getting To Know Your Instrument Panel” for
further information on the symbols used in
your vehicle.
ROLLOVER WARNING
Utility vehicles have a significantly higher
rollover rate than other types of vehicles. This
vehicle has a higher ground clearance and a
higher center of gravity than many passenger
vehicles. It is capable of performing better in
a wide variety of off-road applications. Driven
in an unsafe manner, all vehicles can go out
of control. Because of the higher center of
gravity, if this vehicle is out of control it may
roll over when some other vehicles may not.
Do not attempt sharp turns, abrupt maneu-
vers, or other unsafe driving actions that can
cause loss of vehicle control. Failure to oper-
ate this vehicle safely may result in a colli-
sion, rollover of the vehicle, and severe or
fatal injury. Drive carefully.Failure to use the driver and passenger seat
belts provided is a major cause of severe or
fatal injury. In a rollover crash, an unbelted
person is significantly more likely to die than
a person wearing a seat belt. Always buckle
up.
Rollover Warning Label
HOW TO USE THIS MANUAL
2

NOTE:
A low key fob battery condition may be indi-
cated by a message in the instrument cluster
display, or by the LED light on the key fob. If
the LED key fob light no longer illuminates
from key fob button pushes, then the key fob
battery requires replacement.
In this situation, a back up method can be
used to operate the ignition switch. Put the
nose side of the key fob against the ENGINE
START/STOP button, and push to operate the
ignition switch.NOTE:
Improper disposal of key fob batteries may be
harmful to the environment. Please see an
authorized dealer for proper battery disposal.
To Unlock The Doors And Swing Gate
Push and release the key fob unlock button
once to unlock the driver's door only, or twice
to unlock all the doors and swing gate. When
the key fob unlock button is pushed, the
Illuminated Entry will initiate, and the turn
signal lights will flash twice.
To Lock The Doors And Swing Gate
Push and release the lock button on the key
fob to lock all doors. The turn signals will
flash, and the horn will chirp once to ac-
knowledge the lock signal.
Request For Additional Key Fobs
NOTE:
Only key fobs that are programmed to the
vehicle electronics can be used to start and
operate the vehicle. Once a key fob is pro-
grammed to a vehicle, it cannot be pro-
grammed to any other vehicle.
WARNING!
• Always remove the key fobs from the
vehicle and lock all doors when leaving
the vehicle unattended.
• Always remember to place the ignition in
the OFF mode.
Duplication of key fobs may be performed at
an authorized dealer. This procedure consists
of programming a blank key fob to the vehicle
electronics. A blank key fob is one that has
never been programmed.
NOTE:
• When having the Sentry Key Immobilizer
System serviced, bring all vehicle keys with
you to an authorized dealer.
• Keys must be ordered to the correct key cut
to match the vehicle locks.
Backup Starting Method
GETTING TO KNOW YOUR VEHICLE
14

CAUTION!
life and/or prevent the engine from start-
ing.
• 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 bat-
tery.
• 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.
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.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 electri-
cal device has been removed from the outlet,
the inverter should automatically reset. If the
power rating exceeds approximately
170 Watts, the power inverter may have to be
reset manually.
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.
Power Inverter
59

Auxiliary Switches — If Equipped
Four auxiliary switches located in the lower
switch bank of the instrument panel can be
used to power various electrical devices. You
have the ability to configure the functionality
of the auxiliary switches via the Uconnect
settings. All switches can be configured for
setting the switch type operation to latching
or momentary, power source of either battery
or ignition, and ability to hold last state
across key cycles.NOTE:
Holding last state conditions are met when
switch type is set to latching and power
source is set to ignition.
For more information, refer to “Uconnect
Settings” in “Multimedia” in your owner’s
manual.
For the connection and installation of your
electrical devices refer to your authorized
dealership.
ENVIRONMENTAL
PROTECTION SYSTEMS
Gasoline Particulate Filter (GPF) — 2.0L
T4 200kW Petrol Versions Only
The Gasoline Particulate Filter is a mechani-
cal filter, integral to the exhaust system,
which physically traps carbon particles pres-
ent in the exhaust gases of 2.0L T4 200kW
petrol engine.The particulate filter is needed to eliminate
almost all carbon particle emissions in com-
pliance with current/future regulations and
standards.
Since this filter physically traps particulates,
it must be cleaned (regenerated) during nor-
mal driving operation to remove carbon par-
ticles. The regeneration procedure is con-
trolled 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 harsh-
ness (NVH) and reduced engine perfor-
mance.
Dedicated messages can appear in the in-
strument cluster display as a result of the
condition of the filter. Refer to the opening
paragraph of the "Warning Lights And Mes-
sages" section for further information.
Auxiliary Switches
GETTING TO KNOW YOUR VEHICLE
60

GETTING TO KNOW YOUR INSTRUMENT PANEL
INSTRUMENT CLUSTER DISPLAY. .62
Instrument Cluster Display Location And
Controls....................62
Oil Change Indicator System — If
Equipped....................63
Instrument Cluster Display Selectable
Items......................63
Gear Shift Indicator (GSI) — If
Equipped....................64Fuel System Messages............64WARNING LIGHTS AND MES-
SAGES ....................66
Red Warning Lights..............66
Yellow Warning Lights............70
Yellow Indicator Lights............74
Green Indicator Lights............75
White Indicator Lights............76Blue Indicator Lights.............77
Gray Indicator Lights.............78
ONBOARD DIAGNOSTIC SYSTEM —
OBDII ....................78
Onboard Diagnostic System (OBD II)
Cybersecurity.................78
EMISSIONS INSPECTION AND
MAINTENANCE PROGRAMS....79
GETTING TO KNOW YOUR INSTRUMENT PANEL
61

MESSAGE DESCRIPTION
Engine Will Not Start Service Ad-
Blue System See DealerNOTE:
• The display may take up to five seconds to update after adding 2 gallons (7.5 Liters) or more of AdBlue
(UREA) to the AdBlue (UREA) tank. If you have a fault related to the AdBlue (UREA) system, the display
may not update to the new level. See an authorized dealer for service.
• AdBlue freezes at temperatures lower than 51.8°F (11°C). If the car stands for a long time at this tem-
perature, 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 (UREA) to return to liquid state before topping up.
Gasoline Particulate Filter (GPF) System Messages — If Equipped:
Exhaust System Service Re-
quiredThe engine control unit has detected an issue with the gasoline particulate filter system. See an autho-
rized dealer.
Exhaust System Regeneration in
Process Continue DrivingThe 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 nor-
mally. This message will continue to appear until regeneration is complete.
Exhaust System Regeneration
CompleteThe exhaust gas filter regeneration has been completed. This message will briefly appear.
WARNING LIGHTS AND
MESSAGES
The warning/indicator lights will illuminate in
the instrument panel together with a dedi-
cated message and/or acoustic signal when
applicable. These indications are indicative
and precautionary and as such must not be
considered as exhaustive and/or alternativeto the information contained in the Owner’s
Manual, which you are advised to read care-
fully in all cases. Always refer to the informa-
tion in this chapter in the event of a failure
indication. All active telltales will display first
if applicable. The system check menu may
appear different based upon equipment op-
tions and current vehicle status. Some tell-
tales are optional and may not appear.
Red Warning Lights
— Air Bag Warning Light
This warning light will illuminate to indicate
a fault with the air bag, and will turn on for
four to eight seconds as a bulb check when
the ignition is placed in the ON/RUN or
ACC/ON/RUN position. This light will illumi-
nate with a single chime when a fault with the
GETTING TO KNOW YOUR INSTRUMENT PANEL
66

vehicle and run the engine at idle or slightly
faster, with the transmission in PARK or
NEUTRAL, until the light turns off. Once the
light turns off, you may continue to drive
normally.
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.
— 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 Warn-
ing 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 in-
spected 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.
• The “ESC Off Indicator Light” and the
“ESC Indicator Light” come on momen-
tarily each time the ignition is placed in the
ON/RUN or ACC/ON/RUN position.
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70

Yellow Indicator Lights
/— 4WD Indicator Light — If
Equipped
This light alerts the driver that the vehicle is
in the four-wheel drive mode, and the front
and rear driveshafts are mechanically locked
together forcing the front and rear wheels to
rotate at the same speed.
4L/4WD
LOW— 4WD Low Indicator Light — If
Equipped
This light alerts the driver that the vehicle is
in the four-wheel drive LOW mode. The front
and rear driveshafts are mechanically locked
together forcing the front and rear wheels to
rotate at the same speed. Low range provides
a greater gear reduction ratio to provide in-
creased torque at the wheels.
4HPART
TIME/4WD
PART
TIME—4WD Part Time Indicator Light —
If Equipped
This light alerts the driver that the vehicle is
in the four-wheel drive part time mode, and
the front and rear driveshafts are mechani-
cally locked together forcing the front and
rear wheels to rotate at the same speed.
— Active Speed Limiter Fault Indica-
tor Light — If Equipped
This warning light will illuminate to signal
when there is a fault detected with the Active
Speed Limiter.
— Axle Locker Fault Indicator Light
This light indicates when the front and/or rear
axle locker fault has been detected.
— Front And Rear Axle Lock Indicator
Light
This light indicates when the front, rear, or
both axles have been locked. The telltale will
display the lock icon on the front and rear
axles to indicate the current lock status.
N/NEUTRAL— Neutral Indicator Light
— If Equipped
This light alerts the driver that the vehicle is
in the neutral mode.
— Rear Axle Lock Indicator Light
This light indicates when the rear axle lock
has been activated.
— Rear Fog Indicator — If Equipped
This indicator light will illuminate when the
rear fog lights are on.
— Sway Bar Indicator Light — If
Equipped
This indicator light will illuminate when the
front sway bar is disconnected.
— Wait To Start Light — If Equipped
This indicator light will illuminate for ap-
proximately two seconds when the ignition is
turned to the RUN position. Its duration may
be longer based on colder operating condi-
tions. Vehicle will not initiate start until tell-
tale is no longer displayed.
Refer to “Starting The Engine” in “Starting
And Operating” for further information.
NOTE:
The “Wait To Start” telltale may not illumi-
nate if the intake manifold temperature is
warm enough.
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