trailer JEEP WRANGLER 2023 Owner's Manual

SAFETY249
Feedback To The Driver
The instrument cluster has an HDC icon and the HDC
switch has an indicator light, which offers feedback to the
driver about the state HDC is in.
The cluster icon and switch indicator light will illumi -
nate and remain on solid when HDC is enabled or acti -
vated. This is the normal operating condition for HDC.

 The cluster icon and switch indicator light will flash for
several seconds then extinguish when the driver pushes
the HDC switch but enable conditions are not met.

 The cluster icon and switch indicator light will flash for
several seconds then extinguish when HDC disables
due to excess speed.
 The cluster icon and switch indicator light will flash
when HDC deactivates due to overheated brakes. The
flashing will stop and HDC will activate again once the
brakes have cooled sufficiently.
Hill Start Assist (HSA)
The HSA system is designed to mitigate roll back from a
complete stop while on an incline. If the driver releases
the brake while stopped on an incline, HSA will continue to
hold the brake pressure for a short period. If the driver
does not apply the throttle before this time expires, the
system will release brake pressure and the vehicle will roll
down the hill as normal. The following conditions must be met in order for HSA to
activate:

The feature must be enabled.
 The vehicle must be stopped.
 The parking brake must be off.
 The driver door must be closed. (If the doors are
attached, then the door must be closed. If the doors
are detached then the driver's seat belt must be
buckled.)
 The vehicle must be on a sufficient grade.
 The gear selection must match vehicle uphill direction
(i.e., vehicle facing uphill is in forward gear; vehicle
backing uphill is in REVERSE gear).
 HSA will work in REVERSE gear and all forward gears.
The system will not activate if the transmission is in
PARK or NEUTRAL. For vehicles equipped with a
manual transmission, if the clutch is pressed, HSA will
remain active.
Disabling And Enabling HSA

This feature can be turned on or turned off. To change the
current setting, refer to
Ú
page 184 for further information.

Towing With HSA
HSA will also provide assistance to mitigate roll back while
towing a trailer.
Rain Brake Support (RBS)
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.
WARNING!
HDC is only intended to assist the driver in controlling
vehicle speed when descending hills. The driver must
remain attentive to the driving conditions and is
responsible for maintaining a safe vehicle speed.WARNING!
There may be situations where the Hill Start Assist
(HSA) will not activate and slight rolling may occur, such
as on minor hills or with a loaded vehicle, or while pull -
ing a trailer. HSA is not a substitute for active driving
involvement. It is always the driver’s responsibility to be
attentive to distance to other vehicles, people, and
objects, and most importantly brake operation to
ensure safe operation of the vehicle under all road con -
ditions. Your complete attention is always required
while driving to maintain safe control of your vehicle.
Failure to follow these warnings can result in a collision
or serious personal injury.
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 colli -
sion or serious personal injury.
6

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SAFETY251
Deactivating SSC
SSC will be deactivated but remain available if any of the
following conditions occur:
The driver overrides SSC set speed with throttle or
brake application.
 The vehicle speed exceeds 20 mph (32 km/h) but
remains below 40 mph (64 km/h).
 The vehicle is shifted into PARK.
Disabling SSC
SSC will deactivate and be disabled if any of the following
conditions occur:
 The driver pushes the SSC switch.
 The driveline is shifted out of the 4WD Low.
 The parking brake is applied.
 The vehicle is driven greater than 20 mph (32 km/h)
for greater than 70 seconds.
 The vehicle is driven greater than 40 mph (64 km/h).
SSC will exist immediately.
 The driver door opens. (Driver door opens if doors are
attached or driver seat belt is unbuckled if doors are
detached).
Feedback To The Driver
The instrument cluster has an SSC icon and the SSC
switch has a lamp that offers feedback to the driver about
the state SSC is in.
 The cluster icon and switch lamp will illuminate and
remain on solid when SSC is enabled or activated.
These are the normal operating conditions for SSC.
 The cluster icon and switch lamp will flash for several
seconds then extinguish when the driver pushes the
SSC switch but enabled conditions are not met. 
The cluster icon and switch lamp will flash for several
seconds then extinguish when SSC disables due to
excess speed.
 The cluster icon and switch lamp will flash then extin -
guish when SSC deactivates due to overheated brakes.
Traction Control System (TCS)
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 similarly 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 reduced modes.
Trailer Sway Control (TSC)
TSC uses sensors in the vehicle to recognize an
excessively swaying trailer and will take the appropriate
actions to attempt to stop the sway.
NOTE:TSC cannot stop all trailers from swaying. Always use
caution when towing a trailer and follow the trailer tongue
weight recommendations
Úpage 170.
When TSC is functioning, the ESC Activation/Malfunction
Indicator Light will flash, the engine power may be reduced
and you may feel the brakes being applied to individual
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!
SSC is only intended to assist the driver in controlling
vehicle speed when driving in off-road conditions. The
driver must remain attentive to the driving conditions
and is responsible for maintaining a safe vehicle speed.
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.6

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252SAFETY
AUXILIARY DRIVING SYSTEMS
BLIND SPOT MONITORING (BSM) —
I
F EQUIPPED
The BSM system uses two radar 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 rearview mirrors to
let the driver know that the system is operational. The
BSM system sensors operate when the vehicle is in any
forward gear 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 rearview mirror and extends
approximately 10 ft (3 m) beyond the rear fascia/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 adjacent 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
Úpage 184.
 The Blind Spot Monitoring (BSM) system may experi -
ence dropouts (blinking on and off) of the side mirror
warning indicator light 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 BSM system can become blocked if snow, ice, mud, or
other road contaminations accumulate on the rear fascia/
bumper where the radar sensors are located. The system
may also detect blockage if the vehicle is operated in
areas with extremely low radar returns such as a desert or
parallel to a large elevation drop. If blockage is detected,
a “Blind Spot Temporarily Unavailable, Wipe Rear
Corners” message will display in the cluster, both mirror lights will illuminate, and BSM and RCP alerts will not
occur. This is normal operation. The system will
automatically recover and resume function when the
condition clears. To minimize system blockage, do not
block the area of the rear fascia/bumper where the radar
sensors are located with foreign objects (bumper stickers,
bicycle racks, etc.) and keep it clear of road
contaminations.
BSM Radar Location (Left Side Shown)

The BSM system notifies the driver of objects in the
detection zones by illuminating the BSM Warning Light
located in the outside mirrors in addition to sounding an
audible (chime) alert and reducing the radio volume
Úpage 254.

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306
SERVICING AND MAINTENANCE
SCHEDULED SERVICING — GASOLINE
ENGINE
Your vehicle is equipped with an automatic oil change
indicator system. The oil change indicator system will
remind you that it is time to take your vehicle in for
scheduled maintenance.
Based on engine operation conditions, the oil change
indicator message will illuminate. This means that service
is required for your vehicle. Operating conditions such as
frequent short-trips, trailer tow, extremely hot or cold
ambient temperatures will influence when the “Change
Oil” or “Oil Change Required” message is displayed. Have
your vehicle serviced as soon as possible, within the next
500 miles (805 km).On vehicles equipped with instrument cluster display, “Oil
Change Required” will be displayed and a single chime will
sound, indicating that an oil change is necessary.
On non-instrument cluster display equipped vehicles,
“Change Oil” will flash in the instrument cluster odometer
and a single chime will sound, indicating that an oil
change is necessary.
An authorized dealer will reset the oil change indicator
message after completing the scheduled oil change. If a
scheduled oil change is performed by someone other than
an authorized dealer, the message can be reset by
referring to the steps described under Instrument Cluster
Display for further information
Úpage 108.
NOTE:Under no circumstances should oil change intervals
exceed 10,000 miles (16,000 km), 12 months or 350
hours of engine run time, whichever comes first. The 350
hours of engine run or idle time is generally only a concern
for fleet customers.
Once A Month Or Before A Long Trip:

Check the engine oil level.
 Check the windshield washer fluid level.
 Check the tire inflation pressures and look for unusual
wear or damage, rotate at the first sign of irregular
wear.
 Check the fluid levels of the coolant reservoir, brake
master cylinder, and power steering, and fill as needed.
 Check the function of all interior and exterior lights.

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SERVICING AND MAINTENANCE309
Change the manual transmission fluid if using your
vehicle for any of the following: trailer towing, snow
plowing, heavy loading, taxi, police, delivery service
(commercial service), off-road, desert operation or more
than 50% of your driving is at sustained high speeds
during hot weather, above 90°F (32°C). X
XXXX
Change transfer case fluid if using your vehicle for any of
the following: police, taxi, fleet, or frequent trailer towing. X
X
Inspect and replace PCV valve if necessary. X
Change front and rear axle fluid if using your vehicle for
police, taxi, fleet, off-road or frequent trailer towing. X
XX
1. The spark plug change interval is mileage based only; yearly intervals do not apply.
Mileage Or Time Passed (Whichever Comes
First):
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
Or Years: 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
32,000
48,000
64,000
80,000
96,000
112,000
128,000
144,000
160,000
176,000
192,000
208,000
224,000
240,000
WARNING!
 You can be badly injured working on or around a motor vehicle. Do only service work for which you have the knowledge and the right equipment. If you have any doubt about your
ability to perform a service job, take your vehicle to a competent mechanic.
 Failure to properly inspect and maintain your vehicle could result in a component malfunction and affect vehicle handling and performance. This could cause an accident.
8

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310SERVICING AND MAINTENANCE
SCHEDULED SERVICING — DIESEL ENGINE
Your vehicle is equipped with an automatic oil change
indicator system. The oil change indicator system will
remind you that it is time to take your vehicle in for
scheduled maintenance.
Based on engine operation conditions, the oil change
indicator message will illuminate. This means that service
is required for your vehicle. Operating conditions such as
frequent short-trips, trailer tow, extremely hot or cold
ambient temperatures will influence when the “Oil Change
Required” message is displayed. Have your vehicle
serviced as soon as possible, within the next 500 miles
(805 km).
An authorized dealer will reset the oil change indicator
message after completing the scheduled oil change. If a
scheduled oil change is performed by someone other than
an authorized dealer, to reset the message
Úpage 108.
NOTE:Under no circumstances should oil change intervals
exceed 10,000 miles (16,000 km) or 12 months,
whichever comes first.
Engine Oil Filter Replacement
Residual oil in the housing may spill from the housing
when the new filter is installed if the residual oil is not
either removed from the housing or enough time has not
elapsed to allow the oil to drain back into the engine.
When servicing the oil filter on this engine, open the filter
cap approximately six turns until the cap o-ring is visible
and stop. Wait five minutes with the cap in this position to
allow dirty engine oil to drain back into the engine. After
five minutes, the cap and filter assembly can be removed
and discarded. When installing the new oil filter cartridge
assembly, ensure the cap is tightened to the specified
torque to prevent low oil pressure conditions. Once A Month Or Before A Long Trip:

Check engine oil level
 Check windshield washer fluid level
 Check the tire pressures and look for unusual wear or
damage
 Check the fluid levels of the coolant reservoir, brake
master cylinder, and fill as needed
 Check function of all interior and exterior lights

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312SERVICING AND MAINTENANCE
Mileage Or Time Passed (Whichever Comes First)
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
Or Years: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
16,000
32,000
48,000
64,000
80,000
96,000
112,000
128,000
144,000
160,000
176,000
192,000
208,000
224,000
240,000
Additional Inspections
Completely fill the Diesel Exhaust Fluid tank. X X X X X X X X X X X X X X X
Inspect the CV/Universal joints. X X X X X X X X X X X X X X X
Inspect front suspension, tie rod ends, and replace if necessary. XXXXXXX
Inspect the front and rear axle fluid, change if using your vehicle for
police, taxi, fleet, off-road or frequent trailer towing. X
XXXXXX
Inspect the brake linings, parking brake function. XXXXXXX
Inspect transfer case fluid. XXX X
Additional Maintenance
Drain water from fuel filter assembly. X X X X X X X X X X X X X X X
Replace fuel filters and drain water from the fuel filter assembly. Under normal conditions the diesel fuel filter should be replaced every other oil change and must not
exceed 20,000 miles (32,000 km) if using diesel fuel up to B5. If the vehicle is being used in severe operating conditions, or in certain geographical areas of the country (Pennsylvania, New York, Ohio, Maryland, West Virginia, Arkansas, Oklahoma, Kansas, Iowa, Missouri and Nebraska) due to fuel
cleanliness issues, it is recommended to replace the fuel filter every oil change and must not exceed 10,000 miles.
Replace engine air cleaner filter. XXXXX
Replace the cabin air filter. To be replaced every 12,000 miles (19,000 km).

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338SERVICING AND MAINTENANCE
F25 –10 Amp RedModule 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 RedDIAGNOSTIC PORT
F32 –10 Amp RedHeating Ventilation Air Conditioning Mod (HVAC CTRL MOD)/Steering
Column Lock (SCL)/Occupant Classification Module (OCM)/Driver
Presence Detection Module (DPDM)
F33 –10 Amp RedParkTronics System (PTS)/Infrared Camera Module (IRCM)/Airbag
Disable Lamps (AIRBAG DISABLE LMPS)
F34 –10 Amp RedElectronic Stability Control (ESC)/Electric Hydraulic Power Steering
(EHPS)/Smart Bar Control Module (SBCM) WAKE UP
F35 30 Amp Pink –BRAKE VAC PMP*
F36 30 Amp Pink –TRAILER TOW ELEC BRK MOD*
F37 30 Amp Pink –TRAILER TOW CONN 7W*
F38 20 Amp Blue –Engine Control Module (ECM)
F39 –15 Amp BlueMGU Coolant Pump (3.6)*
F40 –15 Amp BlueDriveTrain Control Module (DTCM)/Axle Lock (AXLE LOC) FT_RR
F41 –15 Amp BlueInstrument Cluster (IC)/Security GateWay (SGW) WAKE UP
F42 –10 Amp RedPCR Ctrl Feed (ESS) *
F43 –20 Amp Yellow PWR OUTLET (CARGO) BATT
F44 –10 Amp RedInfraRed Camera (IRCAM) HEATERS
F45 –20 Amp Yellow PWR OUTLET (CARGO) IGN
CavityCartridge Fuse Micro Fuse Description

* If Equipped

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SERVICING AND MAINTENANCE341
Customer can select to switch the Cargo Power Outlet from F43 battery fed power to this position F45 which is fed when the ignition in ON.F90
20 Amp Blue –TRAILER TOW PARK LMP*
F91 –20 Amp Yellow HORN
F92 40 Amp Green –HD ACCY #2*
F93 40 Amp Green –HD ACCY #1*
F94 ––Spare *
F95 ––Spare *
F96 –10 Amp RedPWR MIRROR SW
F97 –20 Amp Yellow RADIO/TBM
F98 –10 Amp RedSW 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 BlueDUAL USB PORT
F103 –15 Amp BlueHD ACCY #3*
F104 –15 Amp BluePPU COOL PUMP*
F105 –10 Amp RedIntegrated Center Stack (ICS)/Heat Ventilation Air Conditioning (HVAC)
F106 50 Amp Red –ESC -PUMP MTR
F107 –20 Amp Yellow TRAILER TOW STOP/TURN LT*
F108 –15 Amp BlueHD ACCY #4*
F109 –20 Amp Yellow TRAILER TOW STOP/TURN RT*
F110 30 Amp Pink –POWER INVERTER
F111 20 Amp Blue –TRAILER TOW BACKUP*
Cavity Cartridge Fuse Micro Fuse Description

* If Equipped
8

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350SERVICING AND MAINTENANCE
For further information on GAWR, vehicle loading, and
trailer towing Úpage 169.
To determine the maximum loading conditions of your
vehicle, locate the statement “The combined weight of
occupants and cargo should never exceed XXX kg or XXX
lbs” on the Tire And Loading Information Placard. The
combined weight of occupants, cargo/luggage and trailer
tongue weight (if applicable) should never exceed the
weight referenced here.
Steps For Determining Correct Load Limit—
(1) Locate the statement “The combined
weight of occupants and cargo should
never exceed XXX kg or XXX lbs.” on your
vehicle's placard.
(2) Determine the combined weight of
the driver and passengers that will be
riding in your vehicle.
(3) Subtract the combined weight of the
driver and passengers from XXX kg or
XXX lbs. (4) The resulting figure equals the
available amount of cargo and luggage
load capacity. For example, if “XXX”
amount equals 1400 lbs. and there will
be five 150 lb passengers in your
vehicle, the amount of available cargo
and luggage load capacity is 650 lbs.
(1400-750 (5x150) = 650 lbs.)
(5) Determine the combined weight of
luggage and cargo being loaded on the
vehicle. That weight may not safely
exceed the available cargo and luggage
load capacity calculated in Step 4.
(6) If your vehicle will be towing a trailer,
load from your trailer will be transferred
to your vehicle. Consult this manual to
determine how this reduces the
available cargo and luggage load
capacity of your vehicle.
Metric Example For Load Limit
For example, if “XXX” amount equals 635 kg and there will
be five 68 kg passengers in your vehicle, the amount of
available cargo and luggage load capacity is 295 kg
(635-340 (5x68) = 295 kg) as shown in step 4.
NOTE:

If your vehicle will be towing a trailer, load from your
trailer will be transferred to your vehicle. The following
table shows examples on how to calculate total load,
cargo/luggage, and towing capacities of your vehicle
with varying seating configurations and number and
size of occupants. This table is for illustration purposes
only and may not be accurate for the seating and load
carry capacity of your vehicle.
 For the following example, the combined weight of
occupants and cargo should never exceed 865 lb (392
kg).

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