2018 JEEP WRANGLER transmission

and automatic transmission control systems.
The light will illuminate when the ignition is
in the ON/RUN position before engine start.
If the bulb does not come on when turning
the ignition switch from OFF to ON/RUN,
have the condition checked promptly.
Certain conditions, such as a loose or missing
gas cap, poor quality fuel, etc., may illumi-
nate the light after engine start. The vehicle
should be serviced if the light stays on
through several typical driving styles. In most
situations, the vehicle will drive normally and
will not require towing.
When the engine is running, the MIL may
flash to alert serious conditions that could
lead to immediate loss of power or severe
catalytic converter damage. The vehicle
should be serviced as soon as possible if this
occurs.
WARNING!
A malfunctioning catalytic converter, as
referenced above, can reach higher tem-
peratures than in normal operating condi-
tions. This can cause a fire if you drive
WARNING!
slowly or park over flammable substances
such as dry plants, wood, cardboard, etc.
This could result in death or serious injury
to the driver, occupants or others.
CAUTION!
Prolonged driving with the Malfunction
Indicator Light (MIL) on could cause dam-
age to the vehicle control system. It also
could affect fuel economy and driveability.
If the MIL is flashing, severe catalytic
converter damage and power loss will soon
occur. Immediate service is required.
— Tire Pressure Monitoring System
(TPMS) Warning Light
The warning light switches on and a message
is displayed to indicate that the tire pressure
is lower than the recommended value and/or
that slow pressure loss is occurring. In these
cases, optimal tire duration and fuel con-
sumption may not be guaranteed.Should one or more tires be in the condition
mentioned above, the display will show the
indications corresponding to each tire in
sequence.
CAUTION!
Do not continue driving with one or more
flat tires as handling may be compro-
mised. Stop the vehicle, avoiding sharp
braking and steering. If a tire puncture
occurs, repair immediately using the dedi-
cated tire repair kit and contact your au-
thorized dealer as soon as possible.
Each tire, including the spare (if provided),
should be checked monthly when cold and
inflated to the inflation pressure recom-
mended by the vehicle manufacturer on the
vehicle placard or tire inflation pressure la-
bel. (If your vehicle has tires of a different
size than the size indicated on the vehicle
placard or tire inflation pressure label, you
should determine the proper tire inflation
pressure for those tires.)
GETTING TO KNOW YOUR INSTRUMENT PANEL
62

WARNING!
speed in turns, driving on very slippery
surfaces, or hydroplaning. The capabilities
of a BAS-equipped vehicle must never be
exploited in a reckless or dangerous man-
ner, which could jeopardize the user's
safety or the safety of others.
Hill Start Assist (HSA)
The HSA system is designed to mitigate roll
back from a complete stop while on an in-
cline. 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.
• Park brake must be off.• Driver door must be closed.
• The vehicle must be on a sufficient grade.
• The gear selection must match vehicle up-
hill 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 NEU-
TRAL. For vehicles equipped with a manual
transmission, if the clutch is pressed, HSA
will remain active.
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
pulling 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 op-
eration to ensure safe operation of the
vehicle under all road conditions. Your
WARNING!
complete attention is always required
while driving to maintain safe control of
your vehicle. Failure to follow these warn-
ings can result in a collision or serious
personal injury.
Disabling And Enabling HSA
This feature can be turned on or turned off.
To change the current setting using your
instrument cluster display, refer to “Instru-
ment Cluster Display” in “Getting To Know
Your Instrument Panel” for further informa-
tion.
For vehicles not equipped with an instrument
cluster display, perform the following steps:
1. Center the steering wheel (front wheels
pointing straight forward).
2. Shift the transmission into PARK.
3. Apply the parking brake.
4. Start the engine.
5. Rotate the steering wheel slightly more
than one-half turn to the left.
SAFETY
70

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
76

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

STARTING THE ENGINE
Before starting your vehicle, adjust your seat,
adjust both inside and outside mirrors, and
fasten your seat belts.
WARNING!
• When exiting the vehicle, always remove
the key fob from the ignition and lock
your 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 gear selector.
• Do not leave the key fob in or near the
vehicle, or in a location accessible to
children. A child could operate power
windows, other controls, or move the
vehicle.
• Do not leave children or animals inside
parked vehicles in hot weather. Interior
WARNING!
heat build-up may cause serious injury
or death.
Manual Transmission — If Equipped
Apply the parking brake, place the gear se-
lector in NEUTRAL, and press the clutch
pedal before starting the vehicle. This vehicle
is equipped with a clutch interlocking igni-
tion system. It will not start unless the clutch
pedal is pressed to the floor.
Four-Wheel Drive Models Only
In 4L mode, this vehicle will start regardless
of whether or not the clutch pedal is pressed
to the floor. This feature enhances off-road
performance by allowing the vehicle to start
when in 4L without having to press the clutch
pedal. The “4WD Low Indicator Light” will
illuminate when the transfer case has been
shifted into this mode.
Automatic Transmission — If Equipped
Start the vehicle with the gear selector in the
PARK position (vehicle can also be started in
NEUTRAL). Apply the brake before shifting
to any driving range.
Normal Starting — Gasoline Engine
NOTE:
Normal starting of either a cold or a warm
engine is obtained without pumping or press-
ing the accelerator pedal.
Cycle the ignition switch to the START posi-
tion and release when the engine starts. If the
engine fails to start within 10 seconds, cycle
the ignition switch to the LOCK/OFF position,
wait 10 to 15 seconds, then repeat the “Nor-
mal Starting” procedure.
Extreme Cold Weather (Below –22°F Or
−30°C)
To ensure reliable starting at these tempera-
tures, use of an externally powered electric
engine block heater (available from your au-
thorized dealer) is recommended.
117

If Engine Fails To Start
WARNING!
• Never pour fuel or other flammable liq-
uid into the throttle body air inlet open-
ing in an attempt to start the vehicle.
This could result in flash fire causing
serious personal injury.
• Do not attempt to push or tow your
vehicle to get it started. Vehicles
equipped with an automatic transmis-
sion cannot be started this way. Un-
burned fuel could enter the catalytic
converter and once the engine has
started, ignite and damage the converter
and vehicle.
• If the vehicle has a discharged battery,
booster cables may be used to obtain a
start from a booster battery or the battery
in another vehicle. This type of start can
be dangerous if done improperly. Refer
to “Jump Starting Procedure” in “In
Case Of Emergency” for further informa-
tion.Without Tip Start — Manual Transmission Only
If the engine fails to start after you have
followed the “Normal Starting” or “Extreme
Cold Weather” procedures, it may be flooded.
Push the accelerator pedal all the way to the
floor and hold it there while cranking the
engine. This should clear any excess fuel in
case the engine is flooded.
CAUTION!
To prevent damage to the starter, do not
crank the engine for more than 15 seconds
at a time. Wait 10 to 15 seconds before
trying again.
If the engine has been flooded, it may start to
run, but not have enough power to continue
running when the key is released. If this
occurs, continue cranking with the accelera-
tor pedal pushed all the way to the floor.
Release the accelerator pedal and the key
once the engine is running smoothly.If the engine shows no sign of starting after
two 15-second periods of cranking with the
accelerator pedal held to the floor, repeat the
“Normal Starting” or “Extreme Cold
Weather” procedures.
With Tip Start — Automatic Transmission Only
If the engine fails to start after you have
followed the “Normal Starting” or “Extreme
Cold Weather” procedures, it may be flooded.
To clear any excess fuel, push the accelerator
pedal all the way to the floor and hold it.
Then, turn the ignition switch to the START
position and release it as soon as the starter
engages. The starter motor will disengage
automatically in 10 seconds. Once this oc-
curs, release the accelerator pedal, turn the
ignition switch to the LOCK position, wait
10 to 15 seconds, then repeat the “Normal
Starting” procedure.
CAUTION!
To prevent damage to the starter, wait
10 to 15 seconds before trying again.
STARTING AND OPERATING
118

After Starting
The idle speed is controlled automatically,
and it will decrease as the engine warms up.
Normal Starting — Diesel Engine
1. The gear selector must be in the NEU-
TRAL or PARK position before you can
start the engine.
2. Turn the ignition key to the ON position.
3. Watch for the “Wait To Start Light” in the
instrument cluster. Refer to “Instrument
Cluster” in “Getting To Know Your Instru-
ment Panel” for further review. It will glow
for two to ten seconds or more, depending
on engine temperature. When the “Wait
To Start Light” goes out, the engine is
ready to start.
4. Tip Start Feature (Automatic Transmission
Only)
Do notpress the accelerator. Turn the
ignition key to the START position and
then release it. The starter motor will
continue to run, and it will automatically
disengage when the engine is running. If
the engine fails to start, the starter willdisengage automatically in 25 seconds.
If this occurs, turn the ignition switch to
the LOCK position, wait 25 to 30 sec-
onds, then repeat the “Normal Starting”
procedure.
NOTE:
The starter motor may run up to 30 sec-
onds in very cold conditions until the
engine is started. The starter can be dis-
engaged by turning the ignition key to
the OFF position, if required.
5. Without Tip Start Feature (Manual Trans-
mission Only)
Turn the ignition switch to the START
position and release when the engine
starts. If the engine fails to start within
10 seconds, turn the ignition switch to
the LOCK position, wait 10 to 15 sec-
onds, then repeat the “Normal Starting”
procedure.
6. After the engine starts, allow it to idle for
approximately 30 seconds before driving.
This allows oil to circulate and lubricate
the turbocharger.
Diesel Engine Warm-Up
Avoid full throttle operation when the engine
is cold. When starting a cold engine, bring the
engine up to operating speed slowly to allow
the oil pressure to stabilize as the engine
warms up.
NOTE:
High-speed, no-load running of a cold engine
can result in excessive white smoke and poor
engine performance. No-load engine speeds
should be kept under 1,200 rpm during the
warm-up period, especially in cold, ambient
temperature conditions.
If temperatures are below 32°F (0°C), oper-
ate the engine at moderate speeds for five
minutes before full loads are applied.
Diesel Engine Idling — In Cold Weather
Avoid prolonged idling in ambient tempera-
tures below 0°F (-18°C). Long periods of
idling may be harmful to your engine because
combustion chamber temperatures can drop
so low that the fuel may not burn completely.
Incomplete combustion allows carbon and
varnish to form on piston rings and injector
119

ENGINE BREAK-IN
RECOMMENDATIONS
A long break-in period is not required for the
engine and drivetrain (transmission and axle)
in your vehicle.
Drive moderately during the first 300 miles
(500 km). After the initial 60 miles
(100 km), speeds up to 50 or 55 mph (80 or
90 km/h) are desirable.
While cruising, brief full-throttle acceleration
within the limits of local traffic laws contrib-
utes to a good break-in. Wide-open throttle
acceleration in low gear can be detrimental
and should be avoided.
The engine oil installed in the engine at the
factory is a high-quality energy conserving
type lubricant. Oil changes should be consis-
tent with anticipated climate conditions un-
der which vehicle operations will occur. For
the recommended viscosity and quality
grades, refer to “Dealer Service” in “Servic-
ing And Maintenance”.
CAUTION!
Never use Non-Detergent Oil or Straight
Mineral Oil in the engine or damage may
result.
NOTE:
A new engine may consume some oil during
its first few thousand miles (kilometers) of
operation. This should be considered a nor-
mal part of the break-in and not interpreted
as a problem.
PARKING BRAKE
Before exiting the vehicle, make sure that the
parking brake is fully applied. Also, be cer-
tain to leave an automatic transmission in
PARK, or manual transmission in REVERSE
or FIRST gear.
The parking brake lever is located in the
center console. To apply the parking brake,
pull the lever up as firmly as possible. To
release the parking brake, pull the lever up
slightly, push the center button, then lower
the lever completely.When the parking brake is applied with the
ignition switch ON, the “Brake Warning Light”
in the instrument cluster will illuminate.
NOTE:
• When the parking brake is applied and the
automatic transmission is placed in gear,
the “Brake Warning Light” will flash. If
vehicle speed is detected, a chime will
sound to alert the driver. Fully release the
parking brake before attempting to move
the vehicle.
Parking Brake Lever
121