2021 JEEP WRANGLER UNLIMITED trailer

STARTING AND OPERATING
162
The ParkSense switch LED will be on when
ParkSense is disabled or requires service.
The ParkSense switch LED will be off when
the system is enabled. If the ParkSense
switch is pushed, and requires service, the
ParkSense switch LED will blink momen-
tarily, and then the LED will be on.
ParkSense System Usage Precautions
NOTE:
Ensure that the rear bumper is free of
snow, ice, mud, dirt and debris to keep the
ParkSense system operating properly.
Jackhammers, large trucks, and other
vibrations could affect the performance of
ParkSense.
When you turn ParkSense off, the instru -
ment cluster display will read “PARK -
SENSE OFF.” Furthermore, once you turn
ParkSense off, it remains off until you turn
it on again, even if you cycle the ignition.
ParkSense, when on, will reduce the
volume of the radio when it is sounding a
tone.
Clean the ParkSense sensors regularly,
taking care not to scratch or damage them.
The sensors must not be covered with ice,
snow, slush, mud, dirt or debris. Failure to
do so can result in the system not working
properly. The ParkSense system might not
detect an obstacle behind the fascia/
bumper, or it could provide a false indica-
tion that an obstacle is behind the fascia/
bumper.
Use the ParkSense switch to turn the
ParkSense system off if objects such as
bicycle carriers, trailer hitches, etc. are
placed within 12 inches (30 cm) from the
rear fascia/bumper. Failure to do so can
result in the system misinterpreting a
close object as a sensor problem, causing
the “PARKSENSE UNAVAILABLE
SERVICE REQUIRED” message to be
displayed in the instrument cluster
display.
WARNING!
Drivers must be careful when backing up
even when using ParkSense. Always
check carefully behind your vehicle, look
behind you, and be sure to check for
pedestrians, animals, other vehicles,
obstructions, and blind spots before
backing up. You are responsible for
safety and must continue to pay atten -
tion to your surroundings. Failure to do
so can result in serious injury or death.
Before using ParkSense, it is strongly
recommended that the ball mount and
hitch ball assembly is disconnected from
the vehicle when the vehicle is not used
for towing. Failure to do so can result in
injury or damage to vehicles or obstacles
because the hitch ball will be much
closer to the obstacle than the rear fascia
when the loudspeaker sounds the contin -
uous tone. Also, the sensors could detect
the ball mount and hitch ball assembly,
depending on its size and shape, giving
a false indication that an obstacle is
behind the vehicle.
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STARTING AND OPERATING
166
Service The ParkSense Park Assist System
During vehicle start up, when the ParkSense
System has detected a faulted condition, the
instrument cluster will actuate a single
chime, once per ignition cycle, and it will
display the “PARKSENSE UNAVAILABLE
WIPE REAR SENSORS”, “PARKSENSE
UNAVAILABLE WIPE FRONT SENSORS” or
“PARKSENSE UNAVAILABLE SERVICE
REQUIRED” message. When the gear
selector is moved to REVERSE and the
system has detected a faulted condition, the
instrument cluster display will display a car
graphic with an overlay saying “Wipe Off” or
“Service”. Under this condition, ParkSense
will not operate. Refer to “Instrument Cluster
Display” in “Getting To Know Your Instru-
ment Panel” for further information.
If “PARKSENSE UNAVAILABLE WIPE REAR
SENSORS” or “PARKSENSE UNAVAILABLE
WIPE FRONT SENSORS” appears in the
instrument cluster display make sure the
outer surface and the underside of the rear
fascia/bumper and/or front fascia/bumper is
clean and clear of snow, ice, mud, dirt or
other obstruction and then cycle the ignition.
If the message continues to appear, see an
authorized dealer. If the “PARKSENSE UNAVAILABLE
SERVICE REQUIRED” message appears in
the instrument cluster display, see an autho
-
rized dealer.
Cleaning The ParkSense System
Clean the ParkSense sensors with water, car
wash soap, and a soft cloth. Do not use rough
or hard cloths. In washing stations, clean
sensors quickly keeping the vapor jet/high
pressure washing nozzles at least 4 inches
(10 cm) from the sensors. Do not scratch or
poke the sensors. Otherwise, you could
damage the sensors.
ParkSense System Usage Precautions
NOTE:
Ensure that the front and rear bumpers are
free of snow, ice, mud, dirt and debris to
keep the ParkSense system operating
properly.
Jackhammers, large trucks, and other
vibrations could affect the performance of
ParkSense.
When you turn ParkSense System off, the
instrument cluster display will show the
“ParkSense Off” message for two seconds.
Furthermore, once you turn ParkSense off, it remains off until you turn it on again,
even if you cycle the ignition.
When you move the gear selector to the
REVERSE position and ParkSense System
is turned off, the instrument cluster
display will show the “ParkSense Off”
message. This message will be displayed
for as long as the vehicle is in REVERSE.
NOTE:
The “ParkSense Off” message will not
display while the vehicle is in 4LO position.
ParkSense, when on, will reduce the
volume of the radio when it is sounding a
tone.
Clean the ParkSense sensors regularly,
taking care not to scratch or damage them.
The sensors must not be covered with ice,
snow, slush, mud, dirt or debris. Failure to
do so can result in the system not working
properly. The ParkSense system might not
detect an obstacle behind or in front of the
fascia/bumper, or it could provide a false
indication that an obstacle is behind or in
front of the fascia/bumper.
Use the ParkSense switch to turn the
ParkSense system off if obstacles such as
bicycle carriers, trailer hitches, etc. are
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175
Curb Weight
The curb weight of a vehicle is defined as the
total weight of the vehicle with all fluids,
including vehicle fuel, at full capacity condi-
tions, and with no occupants or cargo loaded
into the vehicle. The front and rear curb
weight values are determined by weighing
your vehicle on a commercial scale before
any occupants or cargo are added.
Loading
The actual total weight and the weight of the
front and rear of your vehicle at the ground
can best be determined by weighing it when
it is loaded and ready for operation. The entire vehicle should first be weighed on
a commercial scale to ensure that the GVWR
has not been exceeded. The weight on the
front and rear of the vehicle should then be
determined separately to be sure that the
load is properly distributed over the front and
rear axle. Weighing the vehicle may show
that the GAWR of either the front or rear
axles has been exceeded but the total load is
within the specified GVWR. If so, weight
must be shifted from front to rear or rear to
front as appropriate until the specified
weight limitations are met. Store the heavier
items down low and be sure that the weight
is distributed equally. Stow all loose items
securely before driving.Improper weight distributions can have an
adverse effect on the way your vehicle steers
and handles and the way the brakes operate.
TRAILER TOWING
Trailer Towing Weights (Maximum Trailer Weight Ratings)
CAUTION!
Do not load your vehicle any heavier than
the GVWR or the maximum front and rear
GAWR. If you do, parts on your vehicle can
break, or it can change the way your
vehicle handles. This could cause you to
lose control. Also overloading can shorten
the life of your vehicle.
Model
Frontal AreaMax. GTW (Gross Trailer
Wt.) With Trailer Brakes Max. Trailer Tongue Wt. (See Note)
Two–Door
20 ft2 (1.86 m2)3,300 lb (1,497 kg)
165 lb (75 kg)
Four–Door 30 ft
2 (2.79 m2)5,500 lbs (2,495 kg)
275 lbs (125 kg)
When towing a trailer, the technically permissible laden weight may be exceeded by not more than 10% or 220 lbs (100 kg), whichever is
lower provided the operating speed is restricted to 62 mph (100 km/h) or less. Trailer sway control device is recommended when towing
more than 1,000 lbs (454 kg).
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176
(Continued)
(Continued)
RECREATIONAL TOWING (BEHIND MOTORHOME, ETC.)
Towing This Vehicle Behind Another Vehicle
Recreational Towing — Four-Wheel Drive
Models
NOTE:
The transfer case must be shifted into
NEUTRAL (N), transmission must be in
PARK, for recreational towing.
Towing Condition Wheels OFF the Ground Four-Wheel Drive Models
Flat TowNONESee Instructions
Automatic transmission in PARK.
Transfer case in NEUTRAL (N).
Disconnect negative battery cable.
Tow in forward direction.
Dolly Tow Front NOT ALLOWED
Rear NOT ALLOWED
On Trailer ALL OK
NOTE:
When towing your vehicle, always follow applicable laws. Contact local authorities for additional details.
CAUTION!
DO NOT dolly tow any 4WD vehicle.
Towing with only one set of wheels on
the ground (front or rear) will cause
severe transmission and/or transfer case
damage. Tow with all four wheels either
ON the ground, or OFF the ground (using
a vehicle trailer).Tow only in the forward direction. Towing
this vehicle backwards can cause severe
damage to the transfer case.
Automatic transmissions must be placed
in PARK for recreational towing.
CAUTION! (Continued)
2020_JEEP_JL_WRANGLER_UG_RHD_UK.book Page 176

IN CASE OF EMERGENCY
186
F24– –Spare
F25 –10 Amp Red Module Shift By Wire (MOD_SBW)
(*)
F26 40 Amp Green –Central Body Controller (CBC) 2-EXTERIOR LIGHTS #1
F27 30 Amp Pink –
Front Wipers
F28 40 Amp Green –Central Body Controller (CBC) 3-POWER LOCKS
F29 40 Amp Green –Central Body Controller (CBC) 4-EXTERIOR LIGHTS #2
F30 – –Spare
F31 –10 Amp Red DIAGNOSTIC PORT
(*)
F32 –10 Amp Red Heating Ventilation Air Conditioning Mod (HVAC CTRL MOD)/
Steering Column Lock (SCL)/Occupant Classification Module
(OCM)/Driver Presence Detection Module (DPDM)
(*)
F33 –10 Amp Red ParkTronics System (PTS)/Infrared Camera Module (IRCM)/
Airbag Disable Lamps (AIRBAG DISABLE LMPS)
(*)
F34 –10 Amp Red Electronic Stability Control (ESC)/Electric Hydraulic Power
Steering (EHPS)/Smart Bar Control Module (SBCM) WAKE
UP
(*)
F35 30 Amp Pink –BRAKE VAC PMP — If Equipped
(*)
F36 30 Amp Pink –TRAILER TOW MOD — If Equipped
F37 30 Amp Pink –TRAILER TOW CONN 7W — If Equipped
Cavity Cartridge Fuse Micro Fuse Description
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IN CASE OF EMERGENCY
190
F8230 Amp Pink –FUEL HTR — If Equipped
(*)
F83 60 Amp Yellow GLOW PLUG — If Equipped
(*)
F84 30 Amp Pink –UREA HTR CTRL UNIT — If Equipped
(*)
F85 –10 Amp Red PM SENSOR — If Equipped
(*)
F86 30 Amp Pink –BRAKE VAC PMP 2 — If Equipped
(*)
F87 –10 Amp Red SUPPLY/PURGING PMP — If Equipped
(*)
F88 20 Amp Blue –NOx SENSOR #1/ #2 — IF Equipped
(*)
F89 –10 Amp Red Steering Column Control Module (SCCM)/ Cruise Control
(CRUISE CTL)/Digital TV (DTV)
(*)
F90 20 Amp Blue –TRAILER TOW PARK LMP — If Equipped
F91 –20 Amp Yellow HORN
F92 40 Amp Green –HD ACCY #2 — If Equipped
(*)
F93 40 Amp Green –HD ACCY #1 — If Equipped
(*)
F94 –10 Amp Red Tire Pressure Monitor (TPM)/RF Hub system (CORAX)
(*)
F95 – –Spare
Cavity Cartridge Fuse Micro Fuse Description
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191
F96–10 Amp Red PWR MIRROR SW
F97 –20 Amp Yellow RADIO/TBM
F98 –10 Amp Red SW BANK-HD ELEC/OFF ROAD
(*)
F99 – –Spare
F100 30 Amp Pink –ESC-ECU & VALVES
(*)
F101 30 Amp Pink –DriveTrain Control Module (DTCM)
(*)
F102 –15 Amp Blue DUAL USB PORT
F103 –15 Amp Blue HD ACCY #3 — If Equipped
(*)
F104 –15 Amp Blue PPU COOL PUMP — If Equipped
(*)
F105 –10 Amp Red Integrated Center Stack (ICS)/Heat Ventilation Air
Conditioning (HVAC)
(*)
F106 40 Amp Green –Electronic Speed Control (ESC)-PUMP MTR
(*)
F107 –20 Amp Yellow TRAILER TOW STOP/TURN LT — If Equipped
F108 –15 Amp Blue HD ACCY #4 — If Equipped
(*)
CavityCartridge Fuse Micro Fuse Description
2020_JEEP_JL_WRANGLER_UG_RHD_UK.book Page 191

IN CASE OF EMERGENCY
192
(Continued)
JACKING AND TIRE
CHANGING
F109–20 Amp Yellow TRAILER TOW STOP/TURN RT — If Equipped
F110 30 Amp Pink –POWER INVERTER
(*)
F111 20 Amp Blue –TRAILER TOW BACKUP — If Equipped
Cavity Cartridge Fuse Micro Fuse Description
CAUTION!
When installing the power distribution
center cover, it is important to ensure
the cover is properly positioned and fully
latched. Failure to do so may allow water
to get into the power distribution center
and possibly result in an electrical
system failure.
When replacing a blown fuse, it is
important to use only a fuse having the
correct amperage rating. The use of a
fuse with a rating other than indicated
may result in a dangerous electrical
system overload. If a properly rated fuse
continues to blow, it indicates a problem
in the circuit that must be corrected.
WARNING!
Do not attempt to change a tire on the
side of the vehicle close to moving
traffic. Pull far enough off the road to
avoid the danger of being hit when oper-
ating the jack or changing the wheel.
Being under a jacked-up vehicle is
dangerous. The vehicle could slip off the
jack and fall on you. You could be
crushed. Never put any part of your body
under a vehicle that is on a jack. If you
need to get under a raised vehicle, take
it to a service center where it can be
raised on a lift.
Never start or run the engine while the
vehicle is on a jack.
The jack is designed to be used as a tool
for changing tires only. The jack should
not be used to lift the vehicle for service
purposes. The vehicle should be jacked
on a firm level surface only. Avoid ice or
slippery areas.
WARNING! (Continued)
2020_JEEP_JL_WRANGLER_UG_RHD_UK.book Page 192