2020 JEEP WRANGLER stop start

WARNING!
Many factors, such as vehicle loading,
road conditions and driving conditions,
influence the chance that wheel lift or
rollover may occur. ERM cannot prevent
all wheel lift or roll overs, especially those
that involve leaving the roadway or striking
objects or other vehicles. The capabilities
of an ERM-equipped vehicle must never
be exploited in a reckless or dangerous
manner which could jeopardize the user's
safety or the safety of others.
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. TSC will become active automatically
once an excessively swaying trailer is recog-
nized.NOTE:
TSC cannot stop all trailers from swaying.
Always use caution when towing a trailer and
follow the trailer tongue weight recommenda-
tions. Refer to “Trailer Towing” in “Starting
And Operating” for further information.
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!
If TSC activates while driving, slow the
vehicle down, stop at the nearest safe
location, and adjust the trailer load to
eliminate trailer sway.
Hill Descent Control (HDC) — If Equipped
HDC is only intended for low speed off-road
driving. HDC maintains vehicle speed while
descending hills in off-road driving condi-
tions by applying the brakes when necessary.
The symbol indicates the status
of the Hill Descent Control
(HDC) feature. The lamp will be
on solid when HDC is armed.
HDC can only be armed when the
transfer case is in the “4WD LOW” position
and the vehicle speed is less then 30 mph
(48 km/h). If these conditions are not met
while attempting to use the HDC feature, the
HDC indicator light will flash on/off.
When enabled, HDC senses the terrain and acti-
vates when the vehicle is descending a hill. HDC
speed may be adjusted by the driver to suit the
driving conditions. The speed corresponds to the
transmission gear selected.
Gear Approximate HDC Set
Speed
1st 1 mph (1.5 km/h)
2nd 2.5 mph (4 km/h)
SAFETY
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STARTING AND OPERATING
STARTING THE ENGINE.......117
Manual Transmission — If Equipped . .117
Automatic Transmission — If
Equipped...................117
Normal Starting — Gasoline Engine . . .117
Extreme Cold Weather (Below –22°F Or
−30°C)....................117
If Engine Fails To Start..........118
After Starting.................119
Normal Starting — Diesel Engine. . . .119
ENGINE BREAK-IN RECOMMENDA-
TIONS....................121
PARKING BRAKE............121
MANUAL TRANSMISSION — IF
EQUIPPED.................123
Shifting....................123
Downshifting.................124
Reverse Shifting...............125
AUTOMATIC TRANSMISSION — IF
EQUIPPED................126
Key Ignition Park Interlock........127
Brake/Transmission Shift Interlock
System....................127
Five-Speed Automatic Transmission — If
Equipped...................127
Autostick...................128
FOUR–WHEEL DRIVE OPERATION
(COMMAND-TRAC I OR ROCK-
TRAC)....................129
Operating Instructions/Precautions . . .129
Shift Positions................130
Shifting Procedures.............131
Trac-Lok Rear Axle — If Equipped . . .132
Axle Lock (Tru-Lok) — Rubicon
Models....................132
Electronic Sway Bar Disconnect — If
Equipped...................133
STOP/START SYSTEM — DIESEL
MODELS WITH MANUAL TRANS-
MISSION ONLY..............134
Automatic Mode...............134
SPEED CONTROL............136
To Activate..................137
To Set A Desired Speed..........137
To Vary The Speed Setting.........137
To Accelerate For Passing.........138
To Resume Speed.............138
To Deactivate................138
REFUELING THE VEHICLE.....139
Fuel Filler Cap...............139
Loose Fuel Filler Cap Message......140
STARTING AND OPERATING
115

nozzles. Also, the unburned fuel can enter
the crankcase, diluting the oil and causing
rapid wear to the engine.
Stopping the Engine
The following chart should be used as a guide
in determining the amount of engine idle
time required to sufficiently cool down the
turbocharger before shut down, depending
upon the type of driving and the amount of
cargo.Before turning off your turbo diesel engine,
always allow the engine to return to normal idle
speed and run for several seconds. This assures
proper lubrication of the turbocharger. This is
particularly necessary after any period of hard
driving.
Idle the engine a few minutes before routine
shutdown. After full load operation, idle the
engine three to five minutes before shutting itdown. This idle period will allow the lubricat-
ing oil and coolant to carry excess heat away
from the combustion chamber, bearings, in-
ternal components, and turbocharger. This is
especially important for turbocharged,
charge air cooled engines.
TURBOCHARGER "COOL DOWN" CHART
Driving
ConditionsLoad Turbocharger
TemperatureIdle Time (In Minutes)
Before Shut Down
Stop & Go Empty Cool Less than 1
Stop & Go Medium Warm 1
Highway Speeds Medium Warm 2
City Traffic Max. GCWR Warm 3
Highway Speeds Max. GCWR Warm 4
Uphill Grade Max. GCWR Hot 5
STARTING AND OPERATING
120

AUTOMATIC
TRANSMISSION — IF
EQUIPPED
CAUTION!
Damage to the transmission may occur if
the following precautions are not ob-
served:
• 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.
NOTE:
You must press and hold the brake pedal
while shifting out of PARK.
WARNING!
•Never use the PARK position as a substi-
tute for the parking brake. Always apply
the parking brake fully when exiting the
vehicle to guard against vehicle move-
ment and possible injury or damage.
• Your vehicle could move and injure you
and others if it is not in PARK. Check by
trying to move the gear selector out of
PARK with the brake pedal released.
Make sure the transmission is in PARK
before exiting the vehicle.
• It is dangerous to shift out of PARK or
NEUTRAL if the engine speed is higher
than idle speed. If your foot is not firmly
pressing the brake pedal, the vehicle
could accelerate quickly forward or in
reverse. You could lose control of the
vehicle and hit someone or something.
Only shift into gear when the engine is
idling normally and your foot is firmly
pressing the brake pedal.
• Unintended movement of a vehicle
could injure those in or near the vehicle.
As with all vehicles, you should never
WARNING!
exit a vehicle while the engine is run-
ning. Before exiting a vehicle always
come to a complete stop, then apply the
parking brake, shift the transmission
into PARK, turn the engine OFF, and
remove the ignition key. Once the key is
removed, the transmission is locked in
PARK, securing the vehicle against un-
wanted movement.
• When exiting the vehicle, always remove
the ignition key from the vehicle and
lock the vehicle.
• Never leave children alone in a vehicle,
or with access to an unlocked vehicle.
Allowing children to be in a vehicle un-
attended is dangerous for a number of
reasons. A child or others could be seri-
ously or fatally injured. Children should
be warned not to touch the parking
brake, brake pedal or the transmission
gear selector.
• Do not leave the ignition key in or near
the vehicle (or in a location accessible to
children). A child could operate power
STARTING AND OPERATING
126

WARNING!
windows, other controls, or move the
vehicle.
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 can only be removed from the
ignition when the ignition is in the LOCK/OFF
position, and once removed the transmission
is locked in PARK.
NOTE:
If a malfunction occurs, the system will trap
the key in the ignition to warn you that this
safety feature is inoperable. The engine can
be started and stopped but the key cannot be
removed until you obtain service.
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 position (engine running or
not) and the brake pedal must be pressed.
Five-Speed Automatic Transmission — If
Equipped
The transmission gear position display (lo-
cated in the instrument cluster) indicates the
transmission gear range. You must press the
brake pedal to move the gear selector out of
PARK (refer to “Brake/Transmission Shift In-
terlock System” in this section). To drive,
move the gear selector from PARK or NEU-
TRAL to the DRIVE position.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).
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 be-
tween these gears.
The transmission gear selector has only
PARK, REVERSE, NEUTRAL, and DRIVE
shift positions. Manual shifts can be made
using the Autostick shift control. Moving the
gear selector to the left or right (-/+) while in
the DRIVE position will manually select the
transmission gear and will display the current
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gear in the instrument cluster as 1, 2, 3, etc.
Refer to “AutoStick” in this section for fur-
ther information.
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, elimi-
nate 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 DRIVE posi-
tion, the transmission will operate automati-
cally, shifting between the five available
gears. To engage AutoStick, simply tap the
gear selector to the right or left (+/-) while in
the DRIVE position. Tapping (-) to enter
AutoStick mode will downshift the transmis-
sion to the next lower gear, while using (+) to
enter AutoStick mode will retain the current
gear. When AutoStick is active, the current
transmission gear is displayed in the instru-
ment cluster.
In AutoStick mode, the transmission will
shift up or down when (+/-) is manually se-
lected by the driver, unless an engine lugging
or overspeed condition would result. It will
remain in the selected gear until anotherupshift or downshift is chosen, except as
described below.
• The transmission will automatically upshift
when necessary to prevent engine over-
speed.
• Heavily pressing the accelerator pedal will
generate an automatic downshift (for im-
proved acceleration) when reasonable.
• 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 gear when coming to a stop.
After a stop, the driver should manually
upshift (+) the transmission as the vehicle
is accelerated.
• You can start out, from a stop, in first or
second gear. Tapping (+) (at a stop) will
allow starting in second gear. Starting out
in second gear can be helpful in snowy or
icy conditions.
Gear Selector
STARTING AND OPERATING
128

positions on hard-surfaced roads will cause
increased tire wear and damage to the drive-
line components. Refer to “Shifting Proce-
dures” in this section for further information
on shifting into 4H or 4L.
The “4WD Indicator Light” (located in the
instrument cluster) alerts the driver that the
vehicle is in four-wheel drive, and the front
and rear driveshafts are locked together. The
light will illuminate when the transfer case is
shifted into the 4H position.
NOTE:
Do not attempt to shift when only the front or
rear wheels are spinning. The transfer case is
not equipped with a synchronizer, and the
front and rear driveshaft speeds must be
equal for a shift to take place. Shifting while
the front or rear wheels are spinning at differ-
ent speeds can cause damage to the transfer
case.When operating your vehicle in 4L, the en-
gine speed will be approximately three times
(four times for Rubicon models) that of the
2H or 4H positions at a given road speed.
Take care not to overspeed the engine.
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 dam-
age to the transfer case.
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:
2H Position
This range is used for normal street and
highway driving on hard-surfaced roads.
Four-Wheel Drive Shift Pattern
STARTING AND OPERATING
130

4H Position
This range locks the front and rear driveshafts
together, forcing the front and rear wheels to
rotate at the same speed. This range (4H)
provides additional traction for loose, slip-
pery road surfaces and should not be used on
dry pavement.
The “4WD Indicator Light” (located in the
instrument cluster) will illuminate when the
transfer case is shifted into the 4H position.
N (Neutral) Position
This range disengages the front and rear
driveshafts from the powertrain. It is to be
used for flat towing behind another vehicle.
Refer to “Recreational Towing” in “Starting
And Operating” for further information.
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
WARNING!
driveshafts from the powertrain, and will
allow the vehicle to roll, even if the auto-
matic transmission is in PARK (or manual
transmission is in gear). The parking brake
should always be applied when the driver
is not in the vehicle.
4L Position
This range locks the front and rear driveshafts
together, forcing the front and rear wheels to
rotate at the same speed. This range (4L)
provides additional traction and maximum
pulling power for loose, slippery road sur-
faces only. Do not exceed 25 mph (40 km/h).
CAUTION!
Exceeding 25 mph (40 km/h) while the
transfer case is engaged in 4L may result
in an engine overspeed condition and en-
gine damage.
The “4WD Indicator Light” (located in the
instrument cluster) will illuminate when the
transfer case is shifted into the 4L position.NOTE:
When in 4L, the “ESC Off Indicator Light”
will display in the instrument cluster.
Shifting Procedures
2H to 4H or 4H to 2H
Shifting between 2H and 4H can be made
with the vehicle stopped or in motion. With
the vehicle in motion, the transfer case will
engage/disengage faster if you momentarily
release the accelerator pedal after complet-
ing the shift. Apply a constant force when
shifting the transfer case lever.
4H to 4L or 4L to 4H
With the vehicle rolling at 2 to 3 mph (3 to
5 km/h), shift an automatic transmission into
NEUTRAL (N), or press the clutch pedal on a
manual transmission. While the vehicle is
coasting at 2 to 3 mph (3 to 5 km/h), shift the
transfer case lever firmly to the desired posi-
tion. Do not pause with the transfer case in N
(Neutral). Once the shift is completed, place
the automatic transmission into DRIVE or
release the clutch pedal on a manual trans-
mission.
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