ECU JEEP WRANGLER UNLIMITED 2021 Owner handbook (in English)

GETTING TO KNOW YOUR VEHICLE
58
reset. If the power rating exceeds approxi-
mately 170 Watts, the power inverter may
have to be reset manually.
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 as follows:

Switch type operation: Latching or Momentary

Power source: Battery or Ignition
Ability to hold last state across key cycles:
On or Off Auxiliary Switches
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.
ROOF LUGGAGE RACK — IF
EQUIPPED
NOTE:
Roof rack applications are for Hard Top
models ONLY.
The load carried on the roof, when equipped
with a luggage rack, must not exceed 100 lbs
(45 kg), this includes the weight of the cross -
bars, and it should be uniformly distributed
over the cargo area.
Crossbars should always be used whenever
cargo is placed on the roof rack. Check the
straps frequently to be sure that the load
remains securely attached.
NOTE:
Crossbars can be purchased at an authorized
dealer through Mopar parts.
External racks do not increase the total load
carrying capacity of the vehicle. Be sure that
the total occupant and luggage load inside
the vehicle, plus the load on the luggage
rack, do not exceed the maximum vehicle
load capacity. 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.
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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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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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77
(Continued)
(Continued)
ONBOARD DIAGNOSTIC
SYSTEM — OBD II
Your vehicle is equipped with a sophisticated
Onboard Diagnostic system called OBD II.
This system monitors the performance of the
emissions, engine, and transmission control
systems. When these systems are operating
properly, your vehicle will provide excellent
performance and fuel economy, as well as
engine emissions well within current govern -
ment regulations.
If any of these systems require service, the
OBD II system will turn on the Malfunction
Indicator Light (MIL). It will also store diag -
nostic codes and other information to assist
your service technician in making repairs.
Although your vehicle will usually be drive -
able and not need towing, see an authorized
dealer for service as soon as possible.
Onboard Diagnostic System (OBD II)
Cybersecurity
Your vehicle is required to have an Onboard
Diagnostic system (OBD II) and a connection
port to allow access to information related to
the performance of your emissions controls.
Authorized service technicians may need to
access this information to assist with the
diagnosis and service of your vehicle and
emissions system. For further information, refer to “Cybersecu-
rity” in “Multimedia” in your Owner’s
Manual.
CAUTION!
Prolonged driving with the MIL on could
cause further damage to the emission
control system. It could also affect fuel
economy and driveability. The vehicle
must be serviced before any emissions
tests can be performed.
If the MIL is flashing while the vehicle is
running, severe catalytic converter
damage and power loss will soon occur.
Immediate service is required.
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.
CAUTION! (Continued)
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, information stored in your vehicle
systems, including personal informa-
tion.
WARNING! (Continued)
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SAFETY
92
FCW Limited Warning
If the instrument cluster displays “ACC/FCW
Limited Functionality” or “ACC/FCW Limited
Functionality Clean Front Windshield”
momentarily, there may be a condition that
limits FCW functionality. Although the
vehicle is still drivable under normal condi-
tions, the active braking may not be fully
available. Once the condition that limited
the system performance is no longer present,
the system will return to its full performance
state. If the problem persists, see an autho -
rized dealer.
Service FCW Warning
If the system turns off, and the instrument
cluster displays:
ACC/FCW Unavailable Service Required
Cruise/FCW Unavailable Service Required
This indicates there is an internal system
fault. Although the vehicle is still drivable
under normal conditions, have the system
checked by an authorized dealer.
FCW Sensor Protective Cover
Your vehicle is equipped with a protective
cover that is to be used whenever the wind -
shield is folded down in order to protect the
FCW sensor. To install the cover, follow the
instructions below.
1. Secure the top part of the cover so that it hinges to the header.
2. Swing the cover down and push on it so that it covers the opening.
3. Check to make sure the cover is secured properly.
NOTE:
Be sure to remove the cover before returning
the windshield to the normal position. Store
the cover in the cargo area.
Cleaning Instructions
During windshield down applications, dust/
dirt can accumulate in the cover and block
the camera lens. Use a microfiber cloth to
clean the camera lens, module, and inside
cover, being careful not to damage or scratch
the module.
Tire Pressure Monitoring System (TPMS)
The Tire Pressure Monitoring System (TPMS)
will warn the driver of a low tire pressure
based on the vehicle recommended cold
placard pressure.
NOTE:
The alert warning on the cluster will stay
on until the tire is inflated to the placard
pressure.
The system only warns the tire pressure is
low: it is not able to inflate them.
The tire pressure will vary with temperature
by approximately 1 psi (7 kPa) for every 12°F
(6.5°C). This means that when the outside
temperature decreases, the tire pressure will
decrease. Tire pressure should always be set
based on cold inflation tire pressure. This is
defined as the tire pressure after the vehicle
has not been driven for at least three hours,
or driven less than 1 mile (1.6 km) after a
three hour period. The cold tire inflation
pressure must not exceed the maximum
inflation pressure molded into the tire side -
wall. Refer to “Tires” in “Servicing And
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97

To deactivate the TPMS, first replace all four
wheel and tire assemblies (road tires) with tires
not equipped with Tire Pressure Monitoring (TPM)
sensors. Then, drive the vehicle for 10 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 TIRE PRES-
SURE SYSTEM” message and then display
dashes (--) in place of the pressure values.
Beginning with the next ignition cycle, the TPMS
will no longer chime or display the “SERVICE
TIRE PRESSURE SYSTEM” message in the
instrument cluster but dashes (--) will remain in
place of the pressure values.

To reactivate the TPMS, replace all four
wheel and tire assemblies (road tires) with
tires equipped with TPMS sensors. Then,
drive the vehicle for up to 10 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 turn off. The instru -
ment cluster will display the “SERVICE TIRE
PRESSURE SYSTEM” message and then
display pressure values in place of the
dashes. On the next ignition cycle the
"SERVICE TIRE PRESSURE SYSTEM"
message will no longer be displayed as long
as no system fault exists.OCCUPANT RESTRAINT
SYSTEMS
Some of the most important safety features
in your vehicle are the restraint systems:
Occupant Restraint Systems Features
Seat Belt Systems
Supplemental Restraint Systems (SRS)
Air Bags
Child Restraints
Some of the safety features described in this
section may be standard equipment on some
models, or may be optional equipment on
others. If you are not sure, ask an authorized
dealer.
Important Safety Precautions
Please pay close attention to the information
in this section. It tells you how to use your
restraint system properly, to keep you and
your passengers as safe as possible. Here are some simple steps you can take to
minimize the risk of harm from a deploying
air bag:
1. Children 12 years old and under should
always ride buckled up in the rear seat of
a vehicle with a rear seat.
Warning Label On Front Passenger Sun Visor
2. A child who is not big enough to wear the vehicle seat belt properly (Refer to “Child
Restraints” in this section for further
information) must be secured in the
appropriate child restraint or belt-posi -
tioning booster seat in a rear seating
position.
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99
Enhanced Seat Belt Use Reminder System
(BeltAlert)
Front Seat and Second Row BeltAlert (If
Equipped) BeltAlert is a feature intended to remind
the driver and outboard front seat passenger
to buckle their seat belts. The BeltAlert
feature is active whenever the ignition switch
is in the START or ON/RUN position.
Initial Indication
If the driver is unbuckled when the ignition
switch is first in the START or ON/RUN posi -
tion, a chime will signal for a few seconds. If
the driver or outboard front seat passenger is
unbuckled when the ignition switch is first in
the START or ON/RUN position, the respec -
tive Seat Belt Reminder Light will turn solid
red and remain red until the seat belt is
buckled. The respective Seat Belt Reminder
Light will turn solid green once the seat belt
is buckled. After the driver and outboard
front seat passenger have buckled their seat
belts all Seat Belt Reminder Lights will turn
off. The outboard front passenger seat
BeltAlert is not active when the outboard
front passenger seat is unoccupied. BeltAlert Warning Sequence
The BeltAlert warning sequence is activated
when the vehicle is moving above a specified
vehicle speed range and the driver or
outboard front seat passenger is unbuckled
(the outboard front passenger seat BeltAlert
is not active when the outboard front
passenger seat is unoccupied). The BeltAlert
warning sequence starts by blinking the
respective Seat Belt Reminder Light and
sounding an intermittent chime. Once the
BeltAlert warning sequence has completed,
the Seat Belt Reminder Light will remain
solid red until the driver and outboard front
seat passenger are buckled. The BeltAlert
warning sequence may repeat based on
vehicle speed until the driver and occupied
outboard front seat passenger seat belts are
buckled. The driver should instruct all occu
-
pants to buckle their seat belts.
Change of Status
If the driver or outboard front seat passenger
unbuckles their seat belt while the vehicle is
traveling, the BeltAlert warning sequence
will begin until the seat belts are buckled
again. The outboard front passenger seat BeltAlert
is not active when the outboard front
passenger seat is unoccupied. BeltAlert may
be triggered when an animal or other items
are placed on the outboard front passenger
seat or when the seat is folded flat (if
equipped). It is recommended that pets be
restrained in the rear seat (if equipped) in
pet harnesses or pet carriers that are secured
by seat belts, and cargo is properly stowed.
Rear Seat BeltAlert (If Equipped)
Rear Seat BeltAlert shows the driver whether
the seat belts in the rear seat are buckled or
unbuckled (if equipped with Rear Seat
BeltAlert). When the ignition switch is in the
START or ON/RUN position, a Seat Belt
Reminder Light located in the upper right
corner of the instrument cluster turns on for
each second row seat position (if equipped
with Rear Seat BeltAlert). The Rear BeltAlert
warning sequence is activated when the
vehicle is moving above a specified vehicle
speed range.
If a second row seat belt is buckled, the Rear
BeltAlert Reminder light for that seating
position will illuminate solid green. If a rear
seat passenger is not wearing the seat belt,
the BeltAlert warning sequence will start (if
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SAFETY
110

Following the actions listed in the table above will DISABLE (OFF) the Passenger Advanced Front Air Bag. The Passenger Air Bag DISABLE (OFF)
Indicator light on the overhead sports bar will illuminate to show that the Passenger Advanced Front Air Bag will not deploy during a collision.

ActionInformation
Scroll Up or Down to “Vehicle Set-Up”
Press the “OK” on the vehicle steering wheel to enter “Vehicle
Settings”
Scroll Up or Down using the arrow buttons on the steering wheel
to select “Security”
Press the “OK” button on the steering wheel to select “Security”
Press the “OK” button on the steering wheel to select “Passenger
AIRBAG”
Scroll Up or Down to Passenger AIRBAG OFF “ OFF” NOTE:
If the Passenger Advanced Front Air Bag was previously ENABLED (ON)
it will default to ON and user will have to scroll down to select OFF.
Press the “OK” button on the steering wheel to select Passenger
AIRBAG OFF “ OFF”
Scroll Up or Down to select “YES” to confirm
Press the “OK” button on the steering wheel to select “YES” NOTE:
If this step is not completed within 1 minute this option will timeout
and this process will have to be repeated.
A single chime will sound with the Passenger AIRBAG OFF
indicator light illuminated for 4 to 5 seconds confirming the disabling
of the Passenger Advanced Front Air Bag.
The Passenger AIRBAG OFF indicator light will remain continuously
illuminated telling the driver and front passenger that the Passenger
Advanced Front Air Bag is DISABLED (OFF).
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111
ENABLING (ON) The Passenger Advanced Front Air Bag
Access the instrument cluster display main menu located in the instrument cluster by pushing the Up or Down arrow button located on the
steering wheel, then complete the following actions:
ActionInformation
Scroll Up or Down to “Vehicle Set-Up”
Press the “OK” on the vehicle steering wheel to enter “Vehicle
Settings”
Scroll Up or Down using the arrow buttons on the steering
wheel to select “Security”

Press the “OK” button on the steering wheel to select “Security”

Press the “OK” button on the steering wheel to select
“Passenger AIRBAG”
Scroll Up or Down to Passenger AIRBAG ON “ ON” NOTE:
If the Passenger Advanced Front Air Bag was previously DISABLED (OFF)
it will default to OFF and user will have to scroll down to select ON.
Press the “OK” button on the steering wheel to select
Passenger AIRBAG ON “ ON”
Press the “OK” button on the steering wheel to select “Yes” NOTE:
If this step is not completed within 1 minute this option will timeout and
this process will have to be repeated.
A single chime will sound with the Passenger AIRBAG ON indicator
light illuminated for 4 to 5 seconds confirming the enabling of the
Passenger Advanced Front Air Bag.
The Passenger AIRBAG ON indicator light will remain continuously
illuminated telling the driver and front passenger that the Passenger
Advanced Front Air Bag is ENABLED (ON).
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SAFETY
118
(Continued)
There are different sizes and types of
restraints for children from newborn size to
the child almost large enough for an adult
safety belt. Children should ride rearward
facing as long as possible; this is the most
protected position for a child in the event of
a crash. 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.In Europe, children restraint systems are
defined by regulation ECE-R44, which
divides them into five weight groups:
Check the label of your child restraint. All
approved child restraints must include
type-approval data and the control mark on
its label. The label must be permanently
secured to the child restraint system. You
should not remove this label from the child
restraint.
WARNING!

NEVER use a rearward facing child
restraint on a seat protected by an ACTIVE
AIRBAG in front of it, DEATH or SERIOUS
INJURY to the CHILD can occur.

It is advisable to always carry children in
a child restraint system on the rear seat,
which is the most protected position in
the event of a collision.
Should it be necessary to carry a child on
the passenger side front seat in a
rear-facing child restraint system, the
passenger side front air bag must be
deactivated. Always make sure the
airbag deactivation indicator light is illu
-
minated when using a child restraint
system. The passenger seat must also be
positioned backward as far as possible to
avoid the child restraint system from
coming into contact with the dashboard.
A deploying passenger front air bag can
cause death or serious injury to a child
12 years or younger, including a child in
a rear-facing child restraint.
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.
WARNING! (Continued)
Restraint Group Weight Group
Group 0 up to 10 kg
Group 0+ up to 13 kg
Group 1 9-18 kg
Group 2 15-25 kg
Group 3 22-36 kg
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