2021 JEEP CHEROKEE brakes

STARTING AND OPERATING
144
(Continued)
Recommended Vehicle Shift Speeds
To utilize your manual transmission efficiently for fuel economy and performance, it should be upshifted as listed in the recommended shift
speed chart. Shift at the vehicle speeds listed for acceleration. When heavily loaded or pulling a trailer, these recommended up-shift speeds
may not apply.
Downshifting
Moving from a high gear down to a lower gear
is recommended to preserve brakes when
driving down steep hills. In addition, down-
shifting at the right time provides better
acceleration when you desire to resume
speed. Downshift progressively. Do not skip
gears to avoid overspeeding the engine and
clutch.
Manual Transmission Shift Speeds in MPH (KM/H)
All Engines Gear Selection 2 to 33 to 44 to 55 to 6
Accel. 24 (39) 34 (55) 47 (76) 56 (90)
Cruise 19 (31) 27 (43) 37 (60) 41 (66)
WARNING!
Do not downshift for additional engine
braking on a slippery surface. The drive
wheels could lose their grip, and the
vehicle could skid.
CAUTION!
Skipping gears and downshifting into
lower gears at higher vehicle speeds can
damage the engine and clutch systems,
Any attempt to shift into lower gear with
clutch pedal depressed may result
damage to the clutch system. Shifting
into lower gear and releasing the clutch
may result in engine damage.
When descending a hill, be very careful
to downshift one gear at a time to
prevent overspeeding the engine which
can cause engine damage, and/or clutch
damage, even if the clutch pedal is
pressed. If transfer case is in low range
the vehicle speeds to cause engine and
clutch damage are significantly lower.
Failure to follow the maximum recom -
mended downshifting speeds may cause
the engine damage and/or damage the
clutch, even if the clutch pedal is
pressed.
Descending a hill in low range with
clutch pedal depressed could result in
clutch damage.
CAUTION! (Continued)
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147
NOTE:
You must press and hold the brake pedal
while shifting out of PARK.
Key Ignition Park Interlock
This vehicle is equipped with a Key Ignition
Park Interlock which requires the transmis-
sion to be in PARK before the ignition can be
turned to the LOCK/OFF (key removal) posi -
tion. The key fob can only be removed from
the ignition when the ignition is in the LOCK/
OFF position, and the transmission is locked
in PARK whenever the ignition is in the
LOCK/OFF position.
Brake/Transmission Shift Interlock
System
This vehicle is equipped with a Brake Trans -
mission Shift Interlock system (BTSI) that
holds the transmission gear selector in PARK
unless the brakes are applied. To shift the
transmission out of PARK, the ignition must
be in the ON/RUN mode (engine running or
not) and the brake pedal must be pressed.
The brake pedal must also be pressed to shift
from NEUTRAL into DRIVE or REVERSE
when the vehicle is stopped or moving at low
speeds.
Nine-Speed Automatic Transmission
The transmission gear range (PRND) is
displayed both beside the gear selector and
in the instrument cluster. To select a gear
range, press the lock button on the gear
selector and move the selector rearward or
forward. You must also press the brake pedal
to shift the transmission out of PARK (or
NEUTRAL, when the vehicle is stopped or
moving at low speeds). Select the DRIVE
range for normal driving. NOTE:
In the event of a mismatch between the gear
selector position and the actual transmission
gear (for example, driver selects REVERSE
while driving forward), the position indicator
will blink continuously until the selector is
returned to the proper position, or the
requested shift can be completed.
The electronically-controlled transmission
adapts its shift schedule based on driver
inputs, along with environmental and road
conditions. The transmission electronics are
self-calibrating; therefore, the first few shifts
on a new vehicle may be somewhat abrupt.
This is a normal condition, and precision
shifts will develop within a few hundred
miles (kilometers).
The nine-speed transmission has been devel
-
oped to meet the needs of current and future
FWD/AWD vehicles. Software and calibration
is refined to optimize the customer’s driving
experience and fuel economy. By design,
some vehicle and driveline combinations
utilize 9th gear only in very specific driving
situations and conditions.
CAUTION!
Shift into or out of PARK or REVERSE
only after the vehicle has come to a
complete stop.
Do not shift between PARK, REVERSE,
NEUTRAL, or DRIVE when the engine is
above idle speed.
Before shifting into any gear, make sure
your foot is firmly pressing the brake
pedal.
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157
Possible Reasons The Engine Does Not
Autostop
Prior to engine shut down, the system will
check many safety and comfort conditions to
see if they are fulfilled. Detailed information
about the operation of the Stop/Start system
may be viewed in the instrument cluster
Stop/Start Screen. In the following situations
the engine will not stop:
Driver’s seat belt is not buckled.
Driver’s door is not closed.
Battery temperature is too warm or cold.
The vehicle is on a steep grade.
Cabin heating or cooling is in process and
an acceptable cabin temperature has not
been achieved.
HVAC is set to full defrost mode at a high
blower speed.
Engine has not reached normal operating
temperature.
Battery charge is low.
The transmission is not in DRIVE (auto-
matic transmission) or NEUTRAL (manual
transmission).
Hood is open.
Vehicle is in 4WD LOW transfer case
mode.
Exhaust system regeneration in process.
Other Factors Which Can Inhibit Autostop
Include:
Fuel level.
Accelerator pedal input (automatic trans-
mission only).
Engine temperature too high.
It may be possible for the vehicle to be driven
several times without the Stop/Start system
going into a STOP/START READY state
under more extreme conditions of the items
listed above.
To Start The Engine While In Autostop
Mode
Automatic Transmission:

While in DRIVE, 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. During this tran -
sition, the brakes will hold the vehicle to avoid
undesired vehicle movement.
Manual Transmission:

When the gear selector is in NEUTRAL, the
engine will start when the clutch pedal is
pressed. The vehicle will go into STOP/START
SYSTEM NOT READY mode until the vehicle
speed is greater than 4 mph (7 km/h).

Conditions That Will Cause The Engine To Start
Automatically While In Autostop Mode:

The transmission gear selector is moved
from DRIVE to REVERSE or NEUTRAL.
To maintain cabin temperature comfort.
HVAC is set to full defrost mode.
Battery voltage drops too low.
Low brake vacuum (e.g. after several brake
pedal applications).
Stop/Start OFF switch is pushed.
4WD system is put into 4WD LOW mode.
The emissions system requires it.
A Stop/Start system error occurs.
HVAC system temperature or fan speed is
manually adjusted.
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164
(resume) button, or apply the accelerator
pedal to reengage the ACC to the existing
set speed.
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 appears in the instrument cluster
display.

To increase the distance setting, push the
Distance Setting — Increase button and
release. Each time the button is pushed, the
distance setting increases by one bar (longer).
To decrease the distance setting, push the
Distance Setting — Decrease button and
release. Each time the button is pushed, the
distance setting decreases by one bar
(shorter).
PARKSENSE REAR PARK
ASSIST — IF EQUIPPED
The ParkSense Rear Park Assist system
provides visual and audible indications of
the distance between the rear fascia and a
detected obstacle when backing up (e.g.
during a parking maneuver). The vehicle
brakes may be automatically applied and
released when performing a reverse parking
maneuver if the system detects a possible
collision with an obstacle. Refer to “Ucon
-
nect Settings” in “Multimedia” in the
Owner’s Manual for information on turning
Rear Braking Assist on or off.
Refer to “ParkSense System Usage Precau -
tions” in this section for limitations of this
system and recommendations.
ParkSense will retain the last system state
(enabled or disabled) from the last ignition
cycle when the ignition is changed to the ON/
RUN position.
ParkSense Sensors
The four ParkSense sensors, located in the
rear fascia/bumper, monitor the area behind
the vehicle that is within the sensors’ field of
view. The sensors can detect obstacles from
approximately 12 inches (30 cm) up to
79 inches (200 cm) from the rear fascia/
bumper in the horizontal direction,
depending on the location, type and orienta -
tion of the obstacle.
ParkSense Warning Display
The ParkSense Warning screen will only be
displayed if Sound and Display is selected
from the Customer - Programmable Features
section of the Uconnect System.
Refer to "Uconnect Settings” in “Multi -
media” in the Owner’s Manual for further
information.
The ParkSense Warning screen is located
within the instrument cluster display. It
provides visual warnings to indicate the
distance between the rear fascia/bumper and
the detected obstacle.
Refer to “Instrument Cluster Display” in
“Getting To Know Your Instrument Panel” in
the Owner’s Manual for further information.
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166
PARKSENSE FRONT AND
REAR PARK ASSIST — IF
EQUIPPED
The ParkSense Park Assist system provides
visual and audible indications of the
distance between the rear and/or front fascia
and a detected obstacle when backing up or
moving forward (e.g. during a parking
maneuver). The vehicle brakes may be auto-
matically applied and released when
performing a reverse parking maneuver if the
system detects a possible collision with an
obstacle.
Refer to “ParkSense System Usage Precau -
tions” in “Starting And Operating” in the
Owner’s Manual for limitations of this system
and recommendations.
ParkSense will retain the last system state
(enabled or disabled) from the last ignition
cycle when the ignition is changed to the ON/
RUN position.
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.
CAUTION!
ParkSense is only a parking aid and it is
unable to recognize every obstacle,
including small obstacles. Parking curbs
might be temporarily detected or not
detected at all. Obstacles located above
or below the sensors will not be detected
when they are in close proximity.
The vehicle must be driven slowly when
using ParkSense in order to be able to
stop in time when an obstacle is
detected. It is recommended that the
driver looks over his/her shoulder when
using ParkSense.
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168
PARKSENSE ACTIVE PARK
ASSIST SYSTEM — IF
EQUIPPED
The ParkSense Active Park Assist system is
intended to assist the driver during parallel
and perpendicular parking maneuvers by
identifying a proper parking space, providing
audible/visual instructions, and controlling
the steering wheel. The ParkSense Active
Park Assist system is defined as “semi-auto-
matic” since the driver maintains control of
the accelerator, gear selector and brakes.
Depending on the driver's parking maneuver
selection, the ParkSense Active Park Assist
system is capable of maneuvering a vehicle
into a parallel or a perpendicular parking
space on either side (i.e., driver side or
passenger side).
NOTE:
The driver is always responsible for
controlling the vehicle, responsible for any
surrounding objects, and must intervene
as required.
The system is provided to assist the driver
and not to substitute the driver.
During a semi-automatic maneuver, if the
driver touches the steering wheel after
being instructed to remove their hands
from the steering wheel, the system will
cancel, and the driver will be required to
manually complete the parking maneuver.
The system may not work in all conditions
(e.g. environmental conditions such as
heavy rain, snow, etc., or if searching for a
parking space that has surfaces that will
absorb the ultrasonic sensor waves).
New vehicles from the dealer must have at
least 30 miles (48 km) accumulated
before the ParkSense Active Park Assist
system is fully calibrated and performs
accurately. This is due to the system’s
dynamic vehicle calibration to improve the
performance of the feature. The system
will also continuously perform the
dynamic vehicle calibration to account for
differences such as over or under inflated
tires and new tires.
The ParkSense Active Park Assist system can
be enabled and disabled with the ParkSense
Active Park Assist switch, located on the
switch panel below the Uconnect display. To enable the ParkSense Active
Park Assist system, push the Park
-
Sense Active Park Assist switch
once (LED turns on).
To disable the ParkSense Active Park Assist
system, push the ParkSense Active Park
Assist switch again (LED turns off).
Refer to the Owner’s Manual for further infor -
mation.LANESENSE — IF EQUIPPED
LaneSense Operation
The LaneSense system is operational at
speeds above 37 mph (60 km/h) and below
112 mph (180 km/h). The LaneSense
system uses a forward looking camera to
detect lane markings and measure vehicle
position within the lane boundaries.

When both lane markings are detected and the
driver unintentionally drifts out of the lane (no
turn signal applied), the LaneSense system
provides a haptic warning in the form of torque
applied to the steering wheel, as well as a
visual warning in the instrument cluster
display, to prompt the driver to remain within
the lane boundaries. The LaneSense system

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171
(Continued)
For example: If approaching the left side
of the lane the steering wheel will turn to
the right.
When the LaneSense system senses the
lane has been approached and is in a lane
departure situation, the left thick lane line
flashes yellow (on/off) and the left thin
line remains solid yellow. The LaneSense
telltale changes from solid yellow to
flashing yellow. At this time torque is
applied to the steering wheel in the oppo-
site direction of the lane boundary.For example: If approaching the left side
of the lane the steering wheel will turn to
the right.
NOTE:
The LaneSense system operates with the
similar behavior for a right lane departure.
Changing LaneSense Status
The LaneSense system has settings to adjust
the intensity of the torque warning and the
warning zone sensitivity (early/late) that you
can configure through the Uconnect system
screen.
Refer to “Uconnect Settings” in “Multi -
media” in the Owner’s Manual for further
information. NOTE:
When enabled, the system operates above
37 mph (60 km/h) and below 112 mph
(180 km/h).
Use of the turn signal suppresses the
warnings.
The system will not apply torque to the
steering wheel whenever a safety system
engages (Anti-Lock Brakes, Traction
Control System, Electronic Stability
Control, Forward Collision Warning, etc.).
PARKVIEW REAR BACK UP
CAMERA — IF EQUIPPED
Your vehicle may be equipped with the
ParkView Rear Back Up Camera that allows
you to see an on-screen image of the rear
surroundings of your vehicle whenever the
gear selector is put into REVERSE. The
image will be displayed in the touchscreen
display along with a caution note to “check
entire surroundings” across the top of the
screen. After five seconds this note will
disappear. The ParkView camera is located
on the rear of the vehicle above the rear
license plate. NOTE:
The ParkView Rear Back Up Camera has
programmable modes of operation that may
be selected through the Uconnect System.
Refer to “Uconnect Settings” in “Multi
-
media” in the Owner’s Manual for further
information.
WARNING!
Drivers must be careful when backing up
even when using the ParkView Rear Back
Up Camera. Always check carefully behind
your vehicle, and be sure to check for
pedestrians, animals, other vehicles,
obstructions, or blind spots before backing
up. You are responsible for the safety of
your surroundings and must continue to
pay attention while backing up. Failure to
do so can result in serious injury or death.
CAUTION!
To avoid vehicle damage, ParkView
should only be used as a parking aid. The
ParkView camera is unable to view every
obstacle or object in your drive path.
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178
Gross Vehicle Weight Rating (GVWR)
The Gross Vehicle Weight Rating (GVWR) is
the total permissible weight of your vehicle
including driver, passengers, vehicle,
options and cargo. The label also specifies
maximum capacities of front and rear axle
systems (GAWR). Total load must be limited
so GVWR and front and rear GAWR are not
exceeded.
Payload
The payload of a vehicle is defined as the
allowable load weight a truck can carry,
including the weight of the driver, all passen-
gers, options and cargo.
Gross Axle Weight Rating (GAWR)
The Gross Axle Weight Rating (GAWR) is the
maximum permissible load on the front and
rear axles. The load must be distributed in
the cargo area so that the GAWR of each axle
is not exceeded.
Each axle GAWR is determined by the
components in the system with the lowest
load carrying capacity (axle, springs, tires or
wheels). Heavier axles or suspension compo -nents sometimes specified by purchasers for
increased durability does not necessarily
increase the vehicle's GVWR.
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.
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.
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