2021 JEEP WRANGLER UNLIMITED tow mode

7
TRAILER TOWING ................................ 175

Trailer Towing Weights
(Maximum Trailer Weight Ratings)..... 175

RECREATIONAL TOWING (BEHIND
MOTORHOME, ETC.) ............................. 176
Towing This Vehicle Behind
Another Vehicle ............................ 176 Recreational Towing — Four-Wheel
Drive Models ................................ 176
IN CASE OF EMERGENCY
HAZARD WARNING FLASHERS............... 179
BULB REPLACEMENT............................ 179
Replacement Bulbs ...................... 179
Bulb Replacement ........................ 181
FUSES ............................................... 183
General Information ...................... 183
Power Distribution Center (PDC) .... 184
JACKING AND TIRE CHANGING .............. 192
Jack Location .............................. 193
Spare Tire Removal ...................... 193
Preparations For Jacking .............. 194
Jacking Instructions ...................... 195
Road Tire Installation.................... 197
Declaration Of Conformance .......... 198
Jack Usage Precautions................. 200
JUMP STARTING .................................. 201
Preparations For Jump Start .......... 201
Jump Starting Procedure ............... 202
IF YOUR ENGINE OVERHEATS ...............204
MANUAL PARK RELEASE .....................204
FREEING A STUCK VEHICLE ..................206
TOWING A DISABLED VEHICLE ..............207
Four–Wheel Drive Models .............. 208
Without The Key Fob .................... 208
Tow Eye Usage............................. 208
ENHANCED ACCIDENT RESPONSE
SYSTEM (EARS) ..................................209
EVENT DATA RECORDER (EDR) ..............209
SERVICING AND MAINTENANCE
SCHEDULED SERVICING .......................210
Scheduled Servicing —
Gasoline Engine ........................... 210 Scheduled Servicing —
Diesel Engine............................... 216
ENGINE COMPARTMENT .......................221
2.0L Gasoline Engine .................. 221
3.6L Gasoline Engine .................. 222
2.2L Diesel Engine ....................... 223
Checking Oil Level —
Gasoline Engine .......................... 224 Adding Washer Fluid .................... 224
Maintenance-Free Battery ............ 225
Pressure Washing ......................... 225
DEALER SERVICE .................................226
Windshield Wiper Blades ...............226
Exhaust System ...........................228
Cooling System .............................229
Brake System ..............................230
Automatic Transmission ................231
RAISING THE VEHICLE ..........................232 TIRES .................................................232
Tires — General Information .........232
Tire Types ....................................237
Spare Tires — If Equipped ............237
Wheel And Wheel Trim Care ..........239

Tire Chains And Traction Devices ..... 240

Tire Rotation Recommendations ....241
STORING THE VEHICLE .........................241
BODYWORK .........................................242
Body And Underbody
Maintenance ................................242 Preserving The Bodywork ...............243
INTERIORS ..........................................245
Seats And Fabric Parts ..................245
Plastic And Coated Parts ...............246
Leather Parts ................................246
Glass Surfaces .............................246
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29
(Continued)
Front Head RestraintNOTE:
Do not reposition the head restraint 180
degrees to the incorrect position in an
attempt to gain additional clearance to the
back of the head.
Rear Head Restraints — Two Door Models
The rear seat is equipped with non-adjust
-
able, but foldable head restraints.
To fold the outboard head restraint, pull on
the release strap located on the upper
outboard side of each rear seat.
Rear Head Restraint Folding Strap Location Rear Head Restraints Folded
To return the head restraint to its upward
position, lift up on the head restraint until it
locks into place.
Refer to “Occupant Restraint Systems” in
“Safety” for information on child seat tether
routing.
1 — Release Button
2 — Adjustment Button
WARNING!
A loose head restraint thrown forward in
a collision or hard stop could cause
serious injury or death to occupants of
the vehicle. Always securely stow
removed head restraints in a location
outside the occupant compartment.
ALL the head restraints MUST be rein
-
stalled in the vehicle to properly protect
the occupants. Follow the re-installation
instructions above prior to operating the
vehicle or occupying a seat.
WARNING!
Do not drive the vehicle without the rear
seat head restraints installed while
passengers are occupying the rear seat.
In a collision, people riding in this area
without the head restraints installed are
more likely to be seriously injured or
killed.
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GETTING TO KNOW YOUR VEHICLE
30
Rear Head Restraints — Four Door Models
The rear seat is equipped with nonadjust-
able, but foldable, outboard head restraints,
as well as an adjustable, removable center
head restraint.
To fold the outboard head restraint, pull on
the inner release lever, located on the upper
part of the rear seat. Rear Head Restraint Lever Location
To return the head restraint to its upward
position, lift up on the head restraint until it
locks into place.
To raise the center head restraint, lift up on
the head restraint. To lower the center head
restraint, push the adjustment button,
located at the base of the head restraint, and
push down on the head restraint.
To remove the center head restraint, push
the release button, located on the base of the
head restraint, and pull upward on the head
restraint.
To install the head restraint, hold the release
button while pushing downward on the head
restraint. Refer to “Occupant Restraint
Systems” in “Safety” for information on
child seat tether routing. NOTE:
Lower the center head restraint to avoid
contact with the center console when folding
the seat down.
A loose head restraint thrown forward in
a collision or hard stop could cause
serious injury or death to occupants of
the vehicle. Always securely stow
removed head restraints in a location
outside the occupant compartment.
ALL the head restraints MUST be rein
-
stalled in the vehicle to properly protect
the occupants. Follow the reinstallation
instructions above prior to operating the
vehicle or occupying a seat.
WARNING! (Continued)
WARNING!
Do not drive the vehicle without the rear
seat head restraints installed while
passengers are occupying the rear seat.
In a collision, people riding in this area
without the head restraints installed are
more likely to be seriously injured or
killed.
A loose head restraint thrown forward in
a collision or hard stop could cause
serious injury or death to occupants of
the vehicle. Always securely stow
removed head restraints in a location
outside the occupant compartment.
ALL the head restraints MUST be rein -
stalled in the vehicle to properly protect
the occupants. Follow the reinstallation
instructions above prior to operating the
vehicle or occupying a seat.
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31
STEERING WHEEL
Tilt/Telescoping Steering Column
This feature allows you to tilt the steering
column upward or downward. It also allows
you to lengthen or shorten the steering
column. The tilt/telescoping lever is located
on the steering column, below the turn signal
lever.Tilt/Telescoping Steering Column Lever
To unlock the steering column, push the
control handle downward (toward the floor).
To tilt the steering column, move the
steering wheel upward or downward as
desired. To lengthen or shorten the steering
column, pull the steering wheel outward or push it inward as desired. To lock the
steering column in position, push the control
handle upward until fully engaged.
Heated Steering Wheel — If Equipped
The steering wheel contains a heating
element that helps warm your hands in cold
weather. The heated steering wheel has only
one temperature setting. Once the heated
steering wheel has been turned on, it will
stay on until the operator turns it off. The
heated steering wheel may not turn on when
it is already warm.
The heated steering wheel control button is
located on the center of the instrument panel
below the touchscreen and within the
climate or controls screen of the touch
-
screen.
Push the heated steering wheel button
once to turn the heating element on.
Push the heated steering wheel button
a second time to turn the heating element
off.
NOTE:
The engine must be running for the heated
steering wheel to operate.
Vehicles Equipped With Remote Start
On models that are equipped with remote
start, the heated steering wheel can be
programmed to come on during a remote
start.
This feature can be programmed through the
Uconnect system. Refer to “Uconnect
Settings” in “Multimedia” in the Owner’s
Manual for further information.
WARNING!
Do not adjust the steering column while
driving. Adjusting the steering column
while driving or driving with the steering
column unlocked, could cause the driver
to lose control of the vehicle. Failure to
follow this warning may result in serious
injury or death.
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33
Automatic High Beam — If Equipped
The Automatic High Beam Headlamp Control
system provides increased forward lighting at
night by automating high beam control
through the use of a digital camera mounted
on the vehicle’s header. This camera detects
vehicle specific light and automatically
switches from high beams to low beams until
the approaching vehicle is out of view.
NOTE:

The Automatic High Beam Headlamp
Control can be turned on or off by selecting
“ON” under “Auto High Beam” within your
Uconnect settings, as well as turning the
headlight switch to the AUTO position and
placing the multifunction lever in the high
beam position. Refer to “Uconnect Settings”
in “Multimedia” in the Owner’s Manual for
further information.

Broken, muddy, or obstructed headlights
and taillights of vehicles in the field of
view will cause headlights to remain on
longer (closer to the vehicle). Also, dirt,
film, and other obstructions on the wind-
shield or camera lens will cause the
system to function improperly.
Flash-To-Pass
You can signal another vehicle with your
headlights by lightly pulling the multifunc -
tion lever toward you. This will cause the
high beam headlights to turn on, and remain
on, until the lever is released.
Automatic Headlights — If Equipped
This system automatically turns the head -
lights on or off according to ambient light
levels. To turn the system on, rotate the
headlight switch clockwise to the last detent
for automatic headlight operation. When the
system is on, the headlight time delay
feature is also on. This means the headlights
will stay on for up to 90 seconds after you
place the ignition into the OFF position. To
turn the automatic system off, move the
headlight switch out of the AUTO position.
NOTE:
The engine must be running before the head -
lights will come on in the automatic mode.
Front And Rear Fog Lights — If Equipped
The fog light switches are built into the head -
light switch. Fog Light Switch Location
To activate the front fog lights, push the
upper half of the headlight switch. To turn
off the front fog lights, push the upper half
of the headlight switch a second time.
To activate the rear fog lights, push the lower
half of the headlight switch. To turn off the
rear fog lights, push the lower half of the
headlight switch a second time.
NOTE:
To turn on the rear fog lamps, the low beam
lamps or front fog lamps must first be active.

An indicator light in the instrument cluster
illuminates when the fog lights are turned on.
1 — Front Fog Light Switch
2 — Rear Fog Light Switch
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SAFETY
86
Towing With HSA
HSA will also provide assistance to mitigate
roll back while towing a trailer.
Ready Alert Braking (RAB)
Ready Alert Braking (RAB) may reduce the
time required to reach full braking during
emergency braking situations. It anticipates
when an emergency braking situation may
occur by monitoring how fast the throttle is
released by the driver. The Electronic Brake
Control (EBC) system will prepare the brake
system for a panic stop.
Rain Brake Support (RBS)
Rain Brake Support (RBS) may improve
braking performance in wet conditions. It
will periodically apply a small amount of
brake pressure to remove any water buildup
on the front brake rotors. It functions when
the windshield wipers are in LO or HI speed.
When RBS is active, there is no notification
to the driver and no driver interaction is
required.
Trailer Sway Control (TSC)
Trailer Sway Control (TSC) uses sensors in
the vehicle to recognize an excessively
swaying trailer and will take the appropriate
actions to attempt to stop the sway. TSC will
become active automatically once an exces-
sively swaying trailer is recognized.

NOTE:
TSC cannot stop all trailers from swaying.
Always use caution when towing a trailer and
follow the trailer tongue weight recommenda-
tions. Refer to “Trailer Towing” in “Starting
And Operating” for further information.

When TSC is functioning, the “ESC Activa -
tion/Malfunction Indicator Light” will flash,
the engine power may be reduced and you
may feel the brakes being applied to indi -
vidual wheels to attempt to stop the trailer
from swaying. TSC is disabled when the ESC
system is in the “Partial Off” or “Full Off”
modes.
WARNING!
If you use a trailer brake controller with
your trailer, the trailer brakes may be
activated and deactivated with the brake
switch. If so, there may not be enough
brake pressure to hold both the vehicle
and the trailer on a hill when the brake
pedal is released. In order to avoid
rolling down an incline while resuming
acceleration, manually activate the
trailer brake or apply more vehicle brake
pressure prior to releasing the brake
pedal.
HSA is not a parking brake. Always apply
the parking brake fully when exiting your
vehicle. Also, be certain to place the
transmission in PARK (P).
Failure to follow these warnings can
result in a collision or serious personal
injury. WARNING!
If TSC activates while driving, slow the
vehicle down, stop at the nearest safe
location, and adjust the trailer load to
eliminate trailer sway.
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87
Traction Control System (TCS)

The Traction Control System (TCS) monitors the
amount of wheel spin of each of the driven
wheels. If wheel spin is detected, the TCS may
apply brake pressure to the spinning wheel(s) and/
or reduce engine power to provide enhanced
acceleration and stability. A feature of the TCS,
Brake Limited Differential (BLD), functions
similar to a limited slip differential and controls
the wheel spin across a driven axle. If one wheel
on a driven axle is spinning faster than the other,
the system will apply the brake of the spinning
wheel. This will allow more engine torque to be
applied to the wheel that is not spinning. BLD
may remain enabled even if TCS and Electronic
Stability Control (ESC) are in a reduced mode.

AUXILIARY DRIVING
SYSTEMS
Blind Spot Monitoring (BSM) — If
Equipped
The Blind Spot Monitoring (BSM) system
uses two radar-based sensors, located inside
the taillights, to detect highway licensable
vehicles (automobiles, trucks, motorcycles,
etc.) that enter the blind spot zones from the
rear/front/side of the vehicle.Rear Detection Zones

When the vehicle is started, the BSM warning
light will momentarily illuminate in both outside
rear view mirrors to let the driver know that the
system is operational. The BSM system sensors
operate when the vehicle is in any forward gear or
REVERSE (R) and enters standby mode when the
vehicle is in PARK (P).
The BSM detection zone covers approximately
one lane width on both sides of the vehicle, 12 ft
(3.8 m). The zone length starts at the outside rear
view mirror and extends approximately 10 ft
(3 m) beyond the rear bumper of the vehicle. The
BSM system monitors the detection zones on both
sides of the vehicle when the vehicle speed
reaches approximately 6 mph (10 km/h) or higher and will alert the driver of vehicles in these areas.
NOTE:
The BSM system DOES NOT alert the
driver about rapidly approaching vehicles
that are outside the detection zones.
The BSM system detection zone DOES
NOT change if your vehicle is towing a
trailer. Therefore, visually verify the adja-
cent lane is clear for both your vehicle and
trailer before making a lane change. If the
trailer or other object (i.e., bicycle, sports
equipment) extends beyond the side of
your vehicle, this may result in the BSM
warning light remaining illuminated the
entire time the vehicle is in a forward gear.
The Blind Spot Monitoring (BSM) system
may experience drop outs (blinking on and
off) of the side mirror Warning Indicator
lamps when a motorcycle or any small
object remains at the side of the vehicle
for extended periods of time (more than a
couple of seconds).
The area on taillights, where the radar
sensors are located, must remain free of
snow, ice, and dirt/road contamination so
that the BSM system can function properly.
Do not block the taillights where the radar
sensors are located with foreign objects
(bumper stickers, bicycle racks, etc.).
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SAFETY
88
The BSM system notifies the driver of
objects in the detection zones by illumi-
nating the BSM warning light located in the
outside mirrors in addition to sounding an
audible (chime) alert and reducing the radio
volume. Refer to “Modes Of Operation” for
further information.
The BSM system monitors the detection
zone from three different entry points (side,
rear, front) while driving to see if an alert is
necessary. The BSM system will issue an
alert during these types of zone entries.
Entering From The Side
Vehicles that move into your adjacent lanes
from either side of the vehicle.
Entering From The Rear
Vehicles that come up from behind your
vehicle on either side and enter the rear
detection zone with a relative speed of less
than 30 mph (48 km/h).
Overtaking Traffic
If you pass another vehicle slowly with a rela -
tive speed less than 15 mph (24 km/h) and
the vehicle remains in the blind spot for
approximately 1.5 seconds, the warning light will be illuminated. If the difference in speed
between the two vehicles is greater than
15 mph (24 km/h), the warning light will not
illuminate.
The BSM system is designed not to issue an
alert on stationary objects such as guardrails,
posts, walls, foliage, berms, etc. However,
occasionally the system may alert on such
objects. This is normal operation and your
vehicle does not require service.
The BSM system will not alert you of objects
that are traveling in the opposite direction of
the vehicle in adjacent lanes.Rear Cross Path (RCP)
The Rear Cross Path (RCP) feature is
intended to aid the driver when backing out
of parking spaces where their vision of
oncoming vehicles may be blocked. Proceed
slowly and cautiously out of the parking
space until the rear end of the vehicle is
exposed. The RCP system will then have a
clear view of the cross traffic and if an
oncoming vehicle is detected, alert the
driver.
RCP monitors the rear detection zones on
both sides of the vehicle, for objects that are
moving toward the side of the vehicle with a
minimum speed of approximately 3 mph
(5 km/h), to objects moving a maximum of
approximately 20 mph (32 km/h), such as in
parking lot situations.
NOTE:
In a parking lot situation, oncoming vehicles
can be obscured by vehicles parked on either
side. If the sensors are blocked by other
structures or vehicles, the system will not be
able to alert the driver.
When RCP is on and the vehicle is in
REVERSE (R), the driver is alerted using
both the visual and audible alarms, including
reducing the radio volume.
WARNING!
The Blind Spot Monitoring system is only
an aid to help detect objects in the blind
spot zones. The BSM system is not
designed to detect pedestrians, bicyclists,
or animals. Even if your vehicle is
equipped with the BSM system, always
check your vehicle’s mirrors, glance over
your shoulder, and use your turn signal
before changing lanes. Failure to do so can
result in serious injury or death.
2020_JEEP_JL_WRANGLER_UG_RHD_UK.book Page 88