2023 JEEP WRANGLER warning light

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

23_JL_OM_EN_USC_t.book Page 249

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

23_JL_OM_EN_USC_t.book Page 251

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.

23_JL_OM_EN_USC_t.book Page 252

SAFETY253

Warning Light Location

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.

Side Monitoring

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).

Rear Monitoring

Overtaking Traffic
If you pass another vehicle slowly with a relative 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.

Overtaking/Approaching
Overtaking/Passing

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.
6

23_JL_OM_EN_USC_t.book Page 253

254SAFETY
The BSM system will not alert you of objects that are
traveling in the opposite direction of the vehicle in
adjacent lanes
Úpage 381.

Opposing Traffic

Rear Cross Path (RCP)
RCP 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 Detection Zones

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.
When RCP is on and the vehicle is in REVERSE, the driver
is alerted using both the visual and audible alarms,
including reducing the radio volume.
NOTE:In a parking lot situation, oncoming vehicles can be
blocked 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.
Blind Spot Modes
Blind Spot has three selectable modes of operation that
are available in the Uconnect system.
Blind Spot Alert Lights Only
When operating in Blind Spot Alert mode, the BSM system
will provide a visual alert in the appropriate side view
mirror based on a detected object. However, when the
system is operating in Rear Cross Path (RCP) mode, the
system will respond with both visual and audible alerts
when a detected object is present. Whenever an audible
alert is requested, the radio is muted.
Blind Spot Alert Lights/Chime
When operating in Blind Spot Alert Lights/Chime mode,
the BSM system will provide a visual alert in the
appropriate side view mirror based on a detected object.
If the turn signal is then activated, and it corresponds to
an alert present on that side of the vehicle, an audible
chime will also be sounded. Whenever a turn signal and
detected object are present on the same side at the same
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.
WARNING!
Rear Cross Path Detection (RCP) is not a backup aid
system. It is intended to be used to help a driver detect
an oncoming vehicle in a parking lot situation. Drivers
must be careful when backing up, even when using
RCP. 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. Failure to do so can result in serious
injury or death.

23_JL_OM_EN_USC_t.book Page 254

SAFETY257
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.
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 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 sidewall. The tire pressure will also increase
as the vehicle is driven. This is normal and there should be
no adjustment for this increased pressure.
See
Úpage 345 on how to properly inflate the vehicle’s
tires. The TPMS will warn the driver of a low tire pressure if the
tire pressure falls below the low-pressure warning limit for
any reason, including low temperature effects and natural
pressure loss through the tire.
The TPMS will continue to warn the driver of low tire
pressure as long as the condition exists, and will not turn
off until the tire pressure is at or above the recommended
cold placard pressure. Once the low tire pressure warning
(Tire Pressure Monitoring System Warning Light)
illuminates, you must increase the tire pressure to the
recommended cold placard pressure in order for the
TPMS Warning Light to turn off.
NOTE:When filling warm tires, the tire pressure may need to be
increased up to an additional 4 psi (28 kPa) above the
recommended cold placard pressure in order to turn the
TPMS Warning Light off.
The system will automatically update and the TPMS
Warning Light will turn off once the system receives the
updated tire pressures. The vehicle may need to be driven
for up to 20 minutes above 15 mph (24 km/h) in order for
the TPMS to receive this information.
For example, your vehicle may have a recommended cold
(parked for more than three hours) placard pressure of
33 psi (227 kPa). If the ambient temperature is 68°F
(20°C) and the measured tire pressure is 28 psi
(193 kPa), a temperature drop to 20°F (-7°C) will
decrease the tire pressure to approximately 24 psi
(165 kPa). This tire pressure is low enough to turn on the
TPMS Warning Light. Driving the vehicle may cause the tire
pressure to rise to approximately 28 psi (193 kPa), but the
TPMS Warning Light will still be on. In this situation, the
TPMS Warning Light will turn off only after the tires are
inflated to the vehicle’s recommended cold placard
pressure value
Úpage 381.
NOTE:When filling warm tires, the tire pressure may need to be
increased up to an additional 4 psi (28 kPa) above the
recommended cold placard pressure in order to turn the
TPMS Warning Light off.
CAUTION!

The TPMS has been optimized for the original equip -
ment tires and wheels. TPMS pressures and warning
have been established for the tire size equipped on
your vehicle. Undesirable system operation or sensor
damage may result when using replacement equip -
ment that is not of the same size, type, and/or style.
The TPMS sensor is not designed for use on after -
market wheels, and may contribute to a poor overall
system performance. Customers are encouraged to
use Original Equipment Manufacturer (OEM) wheels
to ensure TPMS feature operation.
 Using aftermarket tire sealants may cause the Tire
Pressure Monitoring System (TPMS) sensor to
become inoperable. After using an aftermarket tire
sealant it is recommended that you take your vehicle
to an authorized dealer to have your sensor function
checked.
 After inspecting or adjusting the tire pressure always
reinstall the valve stem cap. This will prevent mois -
ture and dirt from entering the valve stem, which
could damage the TPMS sensor.
6

23_JL_OM_EN_USC_t.book Page 257

258SAFETY
NOTE:
The TPMS is not intended to replace normal tire care
and maintenance, or to provide warning of a tire failure
or condition.
 The TPMS should not be used as a tire pressure gauge
while adjusting your tire pressure, unless your vehicle
is equipped with a Tire Fill Alert or Selectable Tire Fill
Alert feature.
 Driving on a significantly underinflated tire causes the
tire to overheat and can lead to tire failure. Underinfla -
tion also reduces fuel efficiency and tire tread life, and
may affect the vehicle’s handling and stopping ability.
 The TPMS is not a substitute for proper tire mainte -
nance, and it is the driver’s responsibility to maintain
correct tire pressure using an accurate tire pressure
gauge, even if underinflation has not reached the level
to trigger illumination of the TPMS Warning Light.
 Seasonal temperature changes will affect tire pres -
sure, and the TPMS will monitor the actual tire pres -
sure in the tire.
System Operation
The Tire Pressure Monitoring System (TPMS) uses wireless
technology with wheel rim mounted electronic sensors to
monitor tire pressure levels. Sensors, mounted to each
wheel as part of the valve stem, transmit tire pressure
readings to the receiver module.

Tire Pressure Monitoring System Display

NOTE:It is particularly important for you to check the tire
pressure in all of the tires on your vehicle monthly and to
maintain the proper pressure.
The TPMS consists of the following components:
 Receiver module
 Four Tire Pressure Monitoring System sensors
 Various Tire Pressure Monitoring System messages,
which display in the instrument cluster
 Tire Pressure Monitoring System Warning Light
TIRE PRESSURE MONITORING SYSTEM LOW
PRESSURE WARNINGS
The TPMS Warning Light will illuminate in the
instrument cluster and a chime will sound
when tire pressure is low in one or more of the
four active road tires. In addition, the instrument cluster will display a "Tire Low" message for a
minimum of five seconds, an "Inflate to XX" message and
a graphic showing the pressure values of each tire with the
low tire pressure values in a different color.

Tire Pressure Monitoring System Low Pressure Warning

Should this occur, you should stop as soon as possible
and inflate the tires with low pressure (those in a different
color in the instrument cluster graphic) to the vehicle’s
recommended cold placard pressure value as shown in
the "Inflate to XX" message. Once the system receives the
updated tire pressures, the system will automatically
update, the pressure values in the graphic display in the
instrument cluster will return to their original color, and
the TPMS Warning Light will turn off.

23_JL_OM_EN_USC_t.book Page 258

SAFETY259
NOTE:When filling warm tires, the tire pressure may need to be
increased up to an additional 4 psi (28 kPa) above the
recommended cold placard pressure in order to turn the
TPMS Warning Light off.
The vehicle may need to be driven for up to 20 minutes
above 15 mph (24 km/h) in order for the TPMS to receive
this information.
SERVICE TPMS WARNING
When a system fault is detected, the TPMS Warning Light
will flash on and off for 75 seconds and then remain on
solid. The system fault will also sound a chime. In addition,
the instrument cluster will display a "SERVICE TIRE
PRESSURE SYSTEM" message for a minimum of five
seconds and then display dashes (--) in place of the
pressure value to indicate which sensor is not being
received.
If the ignition is cycled, this sequence will repeat, providing
the system fault still exists. If the system fault no longer
exists, the TPMS Warning Light will no longer flash, and
the “SERVICE TIRE PRESSURE SYSTEM” message will no
longer display, and a pressure value will display in place of
the dashes. A system fault can occur due to any of the
following:
Jamming due to electronic devices or driving next to
facilities emitting the same radio frequencies as the
TPMS sensors
 Installing some form of aftermarket window tinting that
affects radio wave signals
 Lots of snow or ice around the wheels or wheel hous -
ings 
Using tire chains on the vehicle
 Using wheels/tires not equipped with TPMS sensors
Vehicles With A Full-Size Matching Spare

1. If your vehicle is equipped with a matching full-size spare wheel and tire assembly, it has a Tire Pressure
Monitoring System sensor, and can be monitored by
the Tire Pressure Monitoring System (TPMS) when
swapped with a low pressure road tire.

2. In the event that the matching full-size spare tire is swapped with a low pressure road tire, the next
ignition switch cycle will still show the TPMS Warning
Light to be on, a chime to sound, an Inflate to XX
message to appear in the instrument cluster, and the
graphic display will still show the low tire pressure
value in a different color.
3. Driving the vehicle for up to 20 minutes above 15 mph (24 km/h) will turn off the TPMS Warning Light as long as none of road tires are below the low
pressure warning threshold.
TPMS DEACTIVATION — IF EQUIPPED
The TPMS can be deactivated if replacing all four wheel
and tire assemblies (road tires) with wheel and tire
assemblies that do not have TPMS sensors, such as when
installing winter wheel and tire assemblies on your
vehicle.
To deactivate the TPMS, first replace all four wheel and
tire assemblies (road tires) with tires not equipped with
Tire Pressure Monitoring System sensors. Then, drive the
vehicle for 20 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 PRESSURE
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 20 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 instrument 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.
TIRE FILL ALERT
This feature notifies the user when the placard tire
pressure is attained while inflating or deflating the tire.
The customer may choose to disable or enable the Tire Fill
Alert feature in the customer settings menu of the
Uconnect system.
NOTE:
 Only one tire can be filled at a time when using the Tire
Fill Alert system.
 The Tire Fill Alert feature cannot be entered if an
existing TPMS fault is set to “active” or if the system is
in deactivation mode (if equipped).
6

23_JL_OM_EN_USC_t.book Page 259