2021 JEEP WRANGLER UNLIMITED brake

155
To Start The Engine While In Autostop
Mode
While in a forward gear, the engine will start
when the brake pedal is released or the
throttle pedal is depressed. The transmission
will automatically re-engage upon engine
restart.
Conditions That Will Cause The Engine To Start
Automatically While In Autostop Mode:
The transmission selector is moved out of
DRIVE.
To maintain cabin temperature comfort.
Actual cabin temperature is significantly
different than temperature set on Auto
HVAC.
HVAC is set to full defrost mode.
HVAC system temperature or fan speed is
manually adjusted.
Battery voltage drops too low.
Low brake vacuum (e.g. after several brake
pedal applications).
Stop/Start OFF switch is pushed.
A Stop/Start system error occurs.
STOP/START AUTO STOP ACTIVE time
exceeds 5 minutes.
4WD system is put into 4L or Neutral
mode.
Steering wheel is turned beyond
threshold. (ESS Models Only)
To Manually Turn Off The Stop/Start
System
1. Push the Stop/Start OFF switch (located
on the switch bank). The light on the
switch will illuminate.
Stop/Start OFF switch
2. The “STOP/START OFF” message will appear in instrument cluster display
within the Stop/Start section. Refer to
“Instrument Cluster” in “Getting To Know Your Instrument Panel” in your
Owner’s Manual for further information.
3. At the next vehicle stop (after turning off the Stop/Start system), the engine will
not be stopped.
4. The Stop/Start system will reset itself back to an ON condition every time the
ignition is turned off and back on.To Manually Turn On The Stop/Start
System
Push the Stop/Start OFF switch (located on
the switch bank). The light on the switch will
turn off.

For complete details on the Stop/Start System
refer to the “Stop/Start System” in the
“Starting And Operating” section located in
your Owner’s Manual for further information.

System Malfunction
If there is a malfunction in the Stop/Start
system, the system will not shut down the
engine. A “SERVICE STOP/START SYSTEM”
message will appear in the instrument
cluster display. Refer to “Instrument Cluster
Display“ in “Getting to Know Your Instru -
ment Panel” for further information.
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158
To Set A Desired Speed
Turn the Speed Control on.
NOTE:
The vehicle should be traveling at a steady
speed and on level ground before pushing
the SET (+) or SET (-) button.
When the vehicle has reached the desired
speed, push the SET (+) or SET (-) button
and release. Release the accelerator and the
vehicle will operate at the selected speed.
To Resume Speed
To resume a previously set speed, push the
RES button and release. Resume can be
used at any speed above 20 mph (32 km/h).
To Deactivate
A soft tap on the brake pedal, pushing the
CANC (cancel) button, or normal brake pres-
sure while slowing the vehicle will deactivate
the Speed Control without erasing the set
speed from memory.
Pushing the on/off button or placing the igni -
tion in the OFF position, erases the set speed
from memory.
ADAPTIVE CRUISE
CONTROL (ACC) — IF
EQUIPPED
Adaptive Cruise Control Buttons
If your vehicle is equipped with Adaptive
Cruise Control, the controls operate exactly
the same as Speed Control with only a couple
of differences. With this option, you can set
a specified distance you would like to main -
tain between you and the vehicle in front of
you. If the ACC sensor detects a vehicle ahead,
ACC will apply limited braking or accelera
-
tion automatically to maintain a preset
following distance, while matching the speed
of the vehicle ahead.
If the sensor does not detect a vehicle ahead
of you, ACC will maintain a fixed set speed.
To Activate/Deactivate
Push and release the Adaptive Cruise Control
(ACC) on/off button. The ACC menu in the
instrument cluster displays “ACC Ready.”
To turn the system off, push and release the
Adaptive Cruise Control (ACC) on/off button
again. At this time, the system will turn off
and the instrument cluster displays “Adap -
tive Cruise Control (ACC) Off.”
1 — Distance Setting Increase
2 — Adaptive Cruise Control (ACC) On/Off
3 — Distance Setting Decrease
WARNING!
Leaving the Adaptive Cruise Control (ACC)
system on when not in use is dangerous.
You could accidentally set the system or
cause it to go faster than you want. You
could lose control and have a collision.
Always leave the system off when you are
not using it.
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159
To Set A Desired ACC Speed
When the vehicle reaches the speed desired,
push the SET (+) button or the SET (-) button
and release. The instrument cluster display
will display the set speed.
If the system is set when the vehicle speed is
below 19 mph (30 km/h), the set speed shall be defaulted to 19 mph (30 km/h). If the
system is set when the vehicle speed is
above 19 mph (30 km/h), the set speed shall
be the current speed of the vehicle.
NOTE:
ACC cannot be set if there is a stationary
vehicle in front of your vehicle in close prox -
imity.
Remove your foot from the accelerator pedal.
If you do not, the vehicle may continue to
accelerate beyond the set speed. If this
occurs:
The message “DRIVER OVERRIDE” will
display in the instrument cluster display.
The system will not be controlling the
distance between your vehicle and the
vehicle ahead. The vehicle speed will only
be determined by the position of the
accelerator pedal.
To Resume
If there is a set speed in memory push the
RES (resume) button and then remove your
foot from the accelerator pedal. The instru -
ment cluster display will display the last set
speed.
NOTE:
If your vehicle stays at standstill for longer
than two seconds, then the system will
cancel and the brake force will be
ramped-out. The driver will have to apply
the brakes to keep the vehicle at a stand -
still.
ACC cannot be resumed if there is a
stationary vehicle in-front of your vehicle
in close proximity.
To Vary The Speed Setting
To Increase Speed
While ACC is set, you can increase the set
speed by pushing the SET (+) button.
The driver's preferred units can be selected
through the instrument panel settings. Refer
to “Getting To Know Your Instrument Panel”
in the Owner’s Manual for more information.
The speed increment shown is dependent on
the chosen speed unit of U.S. (mph) or
Metric (km/h):
U.S. Speed (mph)
Pushing the SET (+) button once will
result in a 1 mph increase in set speed.
Each subsequent tap of the button results
in an increase of 1 mph.
If the button is continually pushed, the set
speed will continue to increase in 5 mph
increments until the button is released.
The increase in set speed is reflected in
the instrument cluster display. WARNING!
The Resume function should only be used
if traffic and road conditions permit.
Resuming a set speed that is too high or
too low for prevailing traffic and road
conditions could cause the vehicle to
accelerate or decelerate too sharply for
safe operation. Failure to follow these
warnings can result in a collision and
death or serious personal injury.
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160
Metric Speed (km/h)
Pushing the SET (+) button once will
result in a 1 km/h increase in set speed.
Each subsequent tap of the button results
in an increase of 1 km/h.
If the button is continually pushed, the set
speed will continue to increase in 10 km/
h increments until the button is released.
The increase in set speed is reflected in
the instrument cluster display.
To Decrease Speed
While ACC is set, the set speed can be
decreased by pushing the SET (-) button.
The driver's preferred units can be selected
through the instrument panel settings. Refer
to “Getting To Know Your Instrument Panel”
in the Owner’s Manual for more information.
The speed increment shown is dependent on
the chosen speed unit of U.S. (mph) or
Metric (km/h):
U.S. Speed (mph)
Pushing the SET (-) button once will result
in a 1 mph decrease in set speed. Each
subsequent tap of the button results in a
decrease of 1 mph.
If the button is continually pushed, the set
speed will continue to decrease in 5 mph
decrements until the button is released.
The decrease in set speed is reflected in
the instrument cluster display.
Metric Speed (km/h)
Pushing the SET (-) button once will result
in a 1 km/h decrease in set speed. Each
subsequent tap of the button results in a
decrease of 1 km/h.
If the button is continually pushed, the set
speed will continue to decrease in 10 km/
h decrements until the button is released.
The decrease in set speed is reflected in
the instrument cluster display.
NOTE:
When you override and push the SET (+)
button or SET (-) buttons, the new set
speed will be the current speed of the
vehicle.
When you use the SET (-) button to decel -
erate, if the engine’s braking power does
not slow the vehicle sufficiently to reach
the set speed, the brake system will auto-
matically slow the vehicle.
The ACC system applies the brake down to
a full stop when following a target vehicle.
If an ACC host vehicle follows a target
vehicle to a standstill, the host vehicle will
release the vehicle brakes two seconds
after coming to a full stop.
The ACC system maintains set speed when
driving uphill and downhill. However, a
slight speed change on moderate hills is
normal. In addition, downshifting may
occur while climbing uphill or descending
downhill. This is normal operation and
necessary to maintain set speed. When
driving uphill and downhill, the ACC
system will cancel if the braking tempera-
ture exceeds normal range (overheated).
Setting The Following Distance In ACC
The specified following distance for ACC can
be set by varying the distance setting
between four bars (longest), three bars
(long), two bars (medium) and one bar
(short). Using this distance setting and the
vehicle speed, ACC calculates and sets the
distance to the vehicle ahead. This distance
setting displays in the instrument cluster
display.
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165
NOTE:
ParkSense will reduce the volume of the
radio, if on, when the system is sounding an
audio tone.
Front Park Assist Audible Alerts
ParkSense will turn off the Front Park Assist
audible alert (chime) after approximately
three seconds when an obstacle has been
detected, the vehicle is stationary, and the
brake pedal is applied.
Adjustable Chime Volume Settings
The Front and Rear chime volume settings
are programmable.

The settings may be programmed through the
Uconnect System. Refer to “Uconnect Settings”
in “Multimedia” for further information.
The chime volume settings include low,
medium, and high. The factory default
volume setting is medium.
ParkSense will retain its last known configu
-
ration state through ignition cycles.
Enabling And Disabling ParkSense
Front and Rear ParkSense can be enabled
and disabled with the ParkSense switch.
When the ParkSense switch is
pushed to disable the system,
the instrument cluster display
will show the “PARKSENSE
OFF” message for approximately
five seconds. Refer to “Instrument Cluster
Display” in “Getting To Know Your Instru -
ment Panel” for further information. When the gear selector is moved to
REVERSE and the system is disabled, the
instrument cluster display will show the
“PARKSENSE OFF” message for as long as
the vehicle is in REVERSE.
NOTE:
ParkSense is also not available while the
vehicle is in 4LO.
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 Sense switch is
pushed, and the system requires service, the
ParkSense switch LED will blink momen
-
tarily, and then the LED will be on.
WARNING ALERTS FOR FRONT
Front Distance (inches / cm) Greater than
47 inches (120 cm) 47-39 inches
(120-100 cm) 39-25 inches
(100-65 cm) 25-12 inches (65-30
cm) Less than 12 inches
(30 cm)
Arcs — Left NoneNoneNone2nd Flashing 1st Flashing
Arcs — Center None4th Solid 3rd Flashing 2nd Flashing 1st Flashing
Arcs — Right NoneNoneNone2nd Flashing 1st Flashing
Audible Alert Chime None NoneNone FastContinuous
Radio Volume Reduced No
NoNoYes Yes
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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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177
Shifting Into NEUTRAL (N)
Use the following procedure to prepare your
vehicle for recreational towing:1. Bring the vehicle to a complete stop on
level ground.
2. Press and hold the brake pedal.
3. Shift the transmission into NEUTRAL.
4. Turn the engine off.
5. Shift the transfer case lever into NEUTRAL (N).
6. Start the engine.
7. Shift the transmission into REVERSE.
8. Release the brake pedal for five seconds and ensure that there is no vehicle move -
ment.
9. Repeat steps seven and eight with the transmission in DRIVE.
10. Turn the engine OFF and leave the igni -
tion in the unlocked ACC position.
11. Firmly apply the parking brake.Before recreational towing, perform the
procedure outlined under “Shifting Into
NEUTRAL (N)” to be certain that the
transfer case is fully in NEUTRAL (N).
Otherwise, internal damage will result.
Towing this vehicle in violation of the
above requirements can cause severe
transmission and/or transfer case
damage. Damage from improper towing
is not covered under the New Vehicle
Limited Warranty.
Do not use a bumper-mounted clamp-on
tow bar on your vehicle. The bumper face
bar will be damaged.
CAUTION! (Continued)
WARNING!
You or others could be injured or killed if
you leave the vehicle unattended with the
transfer case in the NEUTRAL (N) position
without first fully engaging the parking
brake. The transfer case NEUTRAL (N)
position disengages both the front and rear
driveshafts from the powertrain, and will
allow the vehicle to roll, even if the
automatic transmission is in PARK. The
parking brake should always be applied
when the driver is not in the vehicle.
CAUTION!
It is necessary to follow these steps to be
certain that the transfer case is fully in
NEUTRAL (N) before recreational towing
to prevent damage to internal parts.
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12. Shift the transmission into PARK (NOT inNEUTRAL).
13. Attach the vehicle to the tow vehicle using a suitable tow bar.
14. Release the parking brake.
15. Disconnect the negative battery cable, and secure it away from the negative
battery post.Shifting Out of NEUTRAL (N)
Use the following procedure to prepare your
vehicle for normal usage.
1. Bring the vehicle to a complete stop,leaving it connected to the tow vehicle.
2. Firmly apply the parking brake.
3. Reconnect the negative battery cable.
4. Start the engine.
5. Press and hold the brake pedal.
6. Shift the transmission into NEUTRAL.
7. Turn the engine OFF.
8. Shift the transfer case lever to the desired position.
NOTE:
When shifting the transfer case out of
NEUTRAL (N), the engine should remain Off
to avoid gear clash. 9. Shift the transmission into PARK.
10. Release the brake pedal.
11. Disconnect vehicle from the tow vehicle.
12. Start the engine.
13. Press and hold the brake pedal.
14. Release the parking brake.
15. Shift the transmission into gear, release
the brake pedal, and check that the
vehicle operates normally.
CAUTION!
Damage to the transmission may occur if
the transmission is shifted into PARK with
the transfer case in NEUTRAL (N) and the
engine running. With the transfer case in
NEUTRAL (N) ensure that the engine is
OFF before shifting the transmission into
PARK.
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