2020 JEEP CHEROKEE engine

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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STARTING AND OPERATING
148
Only shift from DRIVE to PARK or REVERSE
when the accelerator pedal is released and
the vehicle is stopped. Be sure to keep your
foot on the brake pedal when shifting
between these gears.
The transmission gear selector provides
PARK, REVERSE, NEUTRAL, DRIVE, and
MANUAL (AutoStick) shift positions. Manual
shifts can be made using the AutoStick shift
control. Moving the gear selector into the
MANUAL (-/+) position (beside the DRIVE
position) activates AutoStick mode,
providing manual shift control and displaying
the current gear in the instrument cluster (as
1, 2, 3, etc.). Toggling the gear selector
forward (-) or rearward (+) while in the
MANUAL position will manually select the
transmission gear.
Refer to “AutoStick” in the Owner’s Manual.
NOTE:
If the gear selector cannot be moved to the
PARK, REVERSE, or NEUTRAL position
(when pushed forward) it is probably in the
MANUAL (AutoStick, (+/-)) position (beside
the DRIVE position). In MANUAL (AutoStick)
mode, the transmission gear (1, 2, 3, etc.) isdisplayed in the instrument cluster. Move
the gear selector to the right (into the DRIVE
[D] position) for access to PARK, REVERSE,
and NEUTRAL.
Gear Selector
Gear Ranges
Do not depress the accelerator pedal when
shifting from PARK or NEUTRAL into
another gear range.
NOTE:
After selecting any gear range, wait a
moment to allow the selected gear to engage
before accelerating. This is especially
important when the engine is cold.
AUTOSTICK
AutoStick is a driver-interactive transmission
feature providing manual shift control, giving
you more control of the vehicle. AutoStick
allows you to maximize engine braking, elim -
inate undesirable upshifts and downshifts,
and improve overall vehicle performance.
This system can also provide you with more
control during passing, city driving, cold slip -
pery conditions, mountain driving, trailer
towing and many other situations.
Operation
When the gear selector is in the AutoStick
position (beside the DRIVE position), it can
be moved forward and rearward. This allows
the driver to manually select the transmis -
sion gear being used. Moving the gear
selector forward (-) triggers a downshift, and
rearward (+) an upshift. The current gear is
displayed in the instrument cluster.
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149
NOTE:
In AutoStick mode, the transmission will
only shift up or down when the driver moves
the gear selector rearward (+) or forward (-),
except as described below.
The transmission will automatically
upshift when necessary to prevent engine
overspeed.
The transmission will automatically down-
shift as the vehicle slows (to prevent
engine lugging) and will display the
current gear.
The transmission will automatically down -
shift to FIRST or SECOND gear
(depending on model) when coming to a
stop. After a stop, the driver should manu -
ally upshift (+) the transmission as the
vehicle is accelerated.
You can start out (from a stop) in FIRST or
SECOND gear. Starting out in SECOND
gear can be helpful in snow or icy condi -
tions. Tap the gear selector forward or
rearward to select the desired gear after
the vehicle is brought to a stop.
If a requested downshift would cause the
engine to overspeed, that shift will not
occur.
The system will ignore attempts to upshift
at too low of a vehicle speed.
Avoid using Speed Control when AutoStick
is engaged because the transmission will
not shift automatically.
Transmission shifting will be more notice-
able when AutoStick is enabled.
The system may revert to automatic shift
mode if a fault or overheat condition is
detected. To disengage AutoStick mode, return the
gear selector to the DRIVE position. You can
shift in or out of the AutoStick position at any
time without taking your foot off the acceler
-
ator pedal.
WARNING!
Do not downshift for additional engine
braking on a slippery surface. The drive
wheels could lose their grip and the
vehicle could skid, causing a collision or
personal injury.
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151
When operating your vehicle in 4WD LOW,
the engine speed is approximately three
times that of the normal driving mode at a
given road speed. Take care not to overspeed
the engine and do not exceed 50 mph
(80 km/h).
Proper operation of four-wheel drive vehicles
depends on tires of equal size, type, and
circumference on each wheel. Any difference
will adversely affect shifting and cause
damage to the driveline components.
Because four-wheel drive provides improved
traction, there is a tendency to exceed safe
turning and stopping speeds. Do not go
faster than road conditions permit.
Shift Positions
For additional information on the appropriate
use of each 4WD system mode position, see
the information below:
NEUTRAL (N)
This range disengages the driveline from the
powertrain.
4WD LOW
This range is for low speed four-wheel drive.
It provides an additional gear reduction
which allows for increased torque to be deliv-
ered to both the front and rear wheels while
providing maximum pulling power for loose,
slippery road surfaces only. Do not exceed
25 mph (40 km/h).
NOTE:
Refer to “Selec-Terrain — If Equipped” for
further information on the various positions
and their intended usages.
Shifting Procedures
Shifting Into 4X4 LOW
With the vehicle at speeds of 0 to 3 mph (0
to 5 km/h), the ignition in the ON mode and
the engine running, shift the transmission
into NEUTRAL, and push the “4WD LOW”
button once. The “4WD LOW” indicator light
in the instrument cluster will begin to flash
and remain on solid when the shift is
complete.
2-Speed 4x4 Switch (With Rear Lock)
NOTE:
If shift conditions/interlocks are not met, a
message will flash from the instrument
cluster display with instructions on how to
complete the requested shift.
WARNING!
You or others could be injured or killed if
you leave the vehicle unattended with the
power transfer unit in the NEUTRAL (N)
position without first fully engaging the
parking brake. The 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 (P) (or
manual transmission is in gear). The
parking brake should always be applied
when the driver is not in the vehicle.
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152
Refer to “Instrument Cluster Display” in
“Getting To know Your Instrument Panel” for
further information.
Shifting Out Of 4X4 LOW
With the vehicle at speeds of 0 to 3 mph (0
to 5 km/h), the ignition in the ON mode and
the engine running, shift the transmission
into NEUTRAL, and push the “4WD LOW”
button once. The “4WD LOW” indicator light
in the instrument cluster will flash and go
out when the shift is complete.
NOTE:
If shift conditions/interlocks are not met, a
message will flash from the instrument
cluster display with instructions on how to
complete the requested shift. Refer to
“Instrument Cluster Display” in “Getting
To Know Your Instrument Panel” for
further information.
Shifting into or out of 4WD LOW is
possible with the vehicle completely
stopped; however, difficulty may occur
due to the mating clutch teeth not being
properly aligned. Several attempts may be
required for clutch teeth alignment and
shift completion to occur. The preferred
method is with the vehicle rolling 0 to3 mph (0 to 5 km/h). If the vehicle is
moving faster than 3 mph (5 km/h), the
4WD system will not allow the shift.
NEUTRAL Shift Procedure
For the neutral shift procedure refer to
“Recreational Towing” in chapter for further
information.
Rear Electronic Locker (E-Locker) System
— If Equipped
The Rear E-Locker System features a
mechanical locking rear differential to
provide better traction in the 4WD LOW posi
-
tion. The “REAR LOCK” button is on the
Selec-Terrain Knob.
Activating The Rear E-Locker
To activate the Rear E-Locker System, the
following conditions must be met:
1. The 4WD system must be in 4WD LOW.
2. The ignition in the ON mode and the engine running.
3. Vehicle speed must be below 15 mph (24 km/h).
4. To engage Rear E-Locker, push the REAR LOCK button once. NOTE:
When engaging Rear E-Locker, the indicator
lights in the instrument cluster and on the
REAR LOCK button will begin to flash. When
the shift is complete the REAR LOCK indi
-
cator lights will remain on.
Rear Lock Button
Deactivating The Rear E-Locker System
To deactivate the Rear E-Locker System, the
following conditions must be met:
1. Rear E-Locker must be engaged, and the REAR LOCK indicator light on.
2. The ignition in the ON mode and the engine running.
3. To disengage Rear E-Locker, push the REAR LOCK button once.
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153
NOTE:
It may also be necessary to drive slowly
steering back and forth to complete
engagement and disengagement of the
E-Locker.

When disengaging Rear E-Locker, the indi-
cator lights in the instrument cluster and on
the REAR LOCK button will begin to flash.
When the shift is complete the REAR LOCK
indicator lights will remain off.

Shifting into or out of Rear E-Locker is
possible with the vehicle completely
stopped; however, difficulty may occur
due to the mating clutch teeth not being
properly aligned. Several attempts may be
required for clutch teeth alignment and
shift completion to occur. The preferred
method is for the vehicle to be rolling,
below 15 mph (24 km/h), while including
right and left steering maneuvers to allow
for the clutch teeth to align.
The Rear E-Locker System must be disen -
gaged prior to taking the vehicle out of
4WD LOW range. If 4WD LOW shift condi -
tions/interlocks are not met, a message
will flash from the instrument cluster
display with instructions on how to
complete the requested shift.
SELEC-TERRAIN
Description
Selec-Terrain allows the driver to specify the
driving surface to allow the vehicle systems
to provide the best performance possible
across a wide range of conditions
Rotate the Selec-Terrain knob to select the
desired mode.
Selec-Terrain Switch
Selec-Terrain offers the following modes:
AUTO — Fully automatic, full time
four-wheel drive operation can be used
both on and off road. Balances traction
with seamless steering feel to provide
improved handling and acceleration.
SNOW — Tuning set for additional stability
in inclement weather. Use when driving on
loose traction surfaces such as snow,
while either on or off road. When in SNOW
mode (depending on certain operating
conditions), the transmission may use
SECOND gear (rather than FIRST gear)
during launches, to minimize wheel slip -
page.
SPORT — This mode alters the transmis -
sion's automatic shift schedule for sportier
driving. Upshift speeds are increased to
make full use of available engine power.
NOTE:
SPORT mode is not available when 4WD
LOW is selected.
SAND/MUD — Off-road calibration for use
on low traction surfaces such as mud,
sand, or wet grass. The 4WD system
provides maximum capability to all
wheels. Some binding may be felt on high
traction surfaces. The electronic brake
system will be adjusted to reduce the
automatic braking of slipping wheels and
to allow the engine to operate without
restriction.
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154
ROCK — Off-road calibration is only avail -
able in 4WD LOW range. ROCK mode
provides the most aggressive 4WD perfor -
mance for extreme off road terrain. Use for
low speed obstacles such as large rocks,
deep ruts, etc.
NOTE:
ROCK mode is only available on the vehi -
cles equipped with the Off-Road package.
Activate the Hill Descent Control or Selec
Speed Control for steep downhill control.
Refer to “Electronic Brake Control System”
in “Safety” for further information.
STOP/START SYSTEM
The Stop/Start function was developed to
reduce fuel consumption. The system will
stop the engine automatically during a
vehicle stop if the required conditions are
met. Releasing the brake pedal or pressing
the accelerator pedal will automatically
restart the engine.
This vehicle has been upgraded with a heavy
duty battery, starter, as well as other engine
parts, to handle the additional engine starts.
Automatic Mode
The Stop/Start feature is enabled after every
normal customer engine start. At that time,
the system will go into STOP/START READY
and if all other conditions are met, can go
into a STOP/START AUTOSTOP ACTIVE
“Autostop” mode.
To Activate The Autostop Mode, The Following
Must Occur:
The system must be in STOP/START
READY state. A STOP/START READY
message will be displayed in the instru -
ment cluster display within the Stop/Start
section. Refer to “Warning Lights And
Messages” in “Getting To Know Your
Instrument Panel” in your Owner’s
Manual.
The vehicle must be completely stopped.
The gear selector must be in a forward
gear and the brake pedal depressed.
The engine will shut down, the tachometer
will move to the zero position and the Stop/
Start telltale will illuminate indicating you
are in Autostop. Customer settings will be
maintained upon return to an engine running
condition. Refer to the “Stop/Start System” in the
“Starting And Operating” in your Owner’s
Manual.
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
display 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
Battery charge is low
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
HVAC set to MAX A/C
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155
Engine has not reached normal operating
temperature
The transmission is not in a forward or
reverse gear
Hood is open
Vehicle is in 4WD LOW transfer case mode
(if equipped with 4WD)
Brake pedal is not pressed with sufficient
pressure with vehicle in DRIVE position
Other Factors Which Can Inhibit Autostop
Include:
Accelerator pedal input
Engine temp too high
5 mph threshold not achieved from
previous AUTOSTOP
Steering angle beyond threshold
ACC is on and speed is set
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
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 gear selector is moved
out of DRIVE except in the PARK position.
To maintain cabin temperature comfort
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
4WD system is put into 4WD LOW mode
(if equipped with 4WD) Conditions That Force An Application Of The
Electric Park Brake While In Autostop Mode:

The driver’s door is open and brake pedal
released
The driver’s door is open and the driver’s
seat belt is unbuckled
The engine hood has been opened
A Stop/Start system error occurs
If the Electric Park Brake is applied with the
engine off, the engine may require a manual
restart and the electric park brake may
require a manual release (depress brake
pedal and push Electric Park Brake switch).
Refer to “Instrument Cluster Display” in
“Getting To Know Your Instrument Panel” in
your Owner’s Manual.
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