2018 JEEP WRANGLER UNLIMITED parking brake

ALWAYS DO A VISUAL CHECKthat your vehicle
is in PARK by looking for the "P" in the
instrument cluster display and on the shifter.
As an added precaution, always apply the
parking brake when exiting the vehicle.
Normal Starting — Diesel Engine
1. The gear selector must be in the NEU-
TRAL or PARK position before you can
start the engine.
2. Place the ignition in 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
Do notpress the accelerator. Cycle the
ignition 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 will disengageautomatically in 25 seconds. If this oc-
curs, cycle the ignition to the LOCK posi-
tion, wait 25 to 30 seconds, 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 cycling the ignition to the
OFF position, if required.
5. 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
nozzles. Also, the unburned fuel can enter
the crankcase, diluting the oil and causing
rapid wear to the engine.
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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 “Fluids And Lubricants” in
“Technical Specifications”.
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.
AUTOMATIC
TRANSMISSION
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 sub-
stitute for the parking brake. Always ap-
WARNING!
ply the parking brake fully when exiting
the vehicle to guard against vehicle
movement and possible injury or dam-
age.
• Your vehicle could move and injure you
and others if it is not in PARK. Check by
trying to move the transmission gear
selector out of PARK with the brake
pedal released. Make sure the transmis-
sion is in PARK before exiting the ve-
hicle.
• The transmission may not engage PARK
if the vehicle is moving. Always bring the
vehicle to a complete stop before shift-
ing to PARK, and verify that the trans-
mission gear position indicator solidly
indicates PARK (P) without blinking. En-
sure that the vehicle is completely
stopped, and the PARK position is prop-
erly indicated, before exiting the ve-
hicle.
• 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
147

WARNING!
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
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, and turn the ignition OFF.
When the ignition is in the OFF mode,
the transmission is locked in PARK, se-
curing the vehicle against unwanted
movement.
• When exiting the vehicle, always make
sure the ignition is in the OFF mode,
remove the key fob 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-
WARNING!
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 key fob in or near the
vehicle (or in a location accessible to
children), and do not leave the ignition
in the ACC or ON/RUN mode. A child
could operate power windows, other con-
trols, or move the vehicle.
Ignition Park Interlock
This vehicle is equipped with an Ignition Park
Interlock which requires the transmission to
be in PARK before the ignition can be turned
to the OFF mode. This helps the driver avoid
inadvertently leaving the vehicle without
placing the transmission in PARK. This sys-
tem also locks the transmission in PARK
whenever the ignition is in the OFF mode.NOTE:
The transmission is NOT locked in PARK
when the ignition is in the ACC mode (even
though the engine will be off). Ensure that
the transmission is in PARK, and the ignition
isOFF(not in ACC mode) before exiting the
vehicle.
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 engine must
be running 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.
Eight–Speed Automatic Transmission
Your vehicle is equipped with a fuel efficient
8 speed transmission. The gear selector is
located in the center console.
STARTING AND OPERATING
148

For additional information on the appropriate
use of each transfer case mode position, see
the information below:
2H
Rear Wheel Drive High Range — This range is
for normal street and highway driving on dry,
hard surfaced roads.
4H
Four-Wheel Drive High Range — This range
maximizes torque to the front driveshaft,
forcing the front and rear wheels to rotate at
the same speed. This range provides addi-
tional traction for loose, slippery road sur-
faces only.
NEUTRAL (N)
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
WARNING!
allow the vehicle to roll, even if the auto-
matic transmission is in PARK. The park-
ing brake should always be applied when
the driver is not in the vehicle.
Neutral — This range disengages both the
front and rear driveshafts from the pow-
ertrain. To be used for flat towing behind
another vehicle.
Refer to “Recreational Towing” in “Starting
And Operating” for further information.
4L
Four-Wheel Drive Low Range — This range
provides low speed four-wheel drive. It maxi-
mizes torque to the front driveshaft, forcing
the front and rear wheels to rotate at the same
speed. This range provides additional trac-
tion and maximum pulling power for loose,
slippery road surfaces only. Do not exceed
25 mph (40 km/h).
The transfer case is intended to be driven in
the 2H position for normal street and highway
conditions, such as hard-surfaced roads.In the event that additional traction is re-
quired, the transfer case 4H and 4L positions
can be used to lock the front and rear drive-
shafts together, forcing the front and rear
wheels to rotate at the same speed. The 4H
and 4L positions are intended for loose, slip-
pery road surfaces only and not intended for
normal driving. Driving in the 4H and 4L
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 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.
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.
151

Five-Position Transfer Case
The transfer case provides five mode posi-
tions:
• 2H (Two-Wheel Drive High Range)
•
4H Auto (Four-Wheel Drive Auto High Range)
• 4H PT (Four-Wheel Drive Part Time High
Range)
• N (Neutral)
• 4L (Four-Wheel Drive Low Range)For additional information on the appropriate
use of each transfer case mode position, see
the information below:
2H
Rear Wheel Drive High Range — This range is
for normal street and highway driving on dry,
hard surfaced roads.
4H AUTO
Four-Wheel Drive Auto High Range — This
range sends power to the front wheels. The
four-wheel drive system will be automatically
engaged when the vehicle senses a loss of
traction. Additional traction for varying road
conditions.
4H P-T
Four-Wheel Drive Part Time High Range —
This range maximizes torque to the front
driveshaft, forcing the front and rear wheels
to rotate at the same speed. This range pro-
vides additional traction for loose, slippery
road surfaces only.NEUTRAL (N)
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 auto-
matic transmission is in PARK. The park-
ing brake should always be applied when
the driver is not in the vehicle.
Neutral — This range disengages both the
front and rear driveshafts from the pow-
ertrain. To be used for flat towing behind
another vehicle.
Refer to “Recreational Towing” in “Starting
And Operating” for further information.
4L
Four-Wheel Drive Low Range — This range
provides low speed four-wheel drive. It maxi-
mizes torque to the front driveshaft, forcing
the front and rear wheels to rotate at the same
Four-Wheel Drive Gear Selector
153

Recreational Towing — Four-Wheel Drive
Models
NOTE:
The transfer case must be shifted into NEU-
TRAL (N), transmission must be in PARK, for
recreational towing.
CAUTION!
• DO NOT dolly tow any 4WD vehicle.
Towing with only one set of wheels on
the ground (front or rear) will cause
severe transmission and/or transfer case
damage. Tow with all four wheels either
ON the ground, or OFF the ground (using
a vehicle trailer).
• Tow only in the forward direction. Towing
this vehicle backwards can cause severe
damage to the transfer case.
• Automatic transmissions must be
placed in PARK for recreational towing.
• 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.
CAUTION!
• Towing this vehicle in violation of the
above requirements can cause severe
transmission and/or transfer case dam-
age. Damage from improper towing is
not covered under the New Vehicle Lim-
ited Warranty.
• Do not use a bumper-mounted clamp-on
tow bar on your vehicle. The bumper
face bar will be damaged.
Shifting Into NEUTRAL (N)
Use the following procedure to prepare your
vehicle for recreational towing.
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 auto-
matic transmission is in PARK. The park-
WARNING!
ing 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.
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 NEU-
TRAL (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
movement.
STARTING AND OPERATING
172

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.
12. Shift the transmission into PARK (NOT
in NEUTRAL).
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.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, leav-
ing 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.
173

3. Reinstall the tire cover if applicable.
NOTE:
If you have added aftermarket accessories to
the spare tire mounted carrier, it cannot ex-
ceed a gross weight of 85 lbs (38.5 kg)
including the weight of the spare tire.
Preparations For Jacking
1. Park on a firm, level surface. Avoid ice or
slippery areas.
WARNING!
Do not attempt to change a tire on the side
of the vehicle close to moving traffic. Pull
far enough off the road to avoid being hit
when operating the jack or changing the
wheel.
2. Turn on the Hazard Warning flasher.
3. Apply the parking brake.
4. Shift the automatic transmission into
PARK.
5. Turn the ignition OFF.6. Block both the front and rear of the wheel
diagonally opposite the jacking position.
For example, if the right front wheel is
being changed, block the left rear wheel.
NOTE:
Passengers should not remain in the vehicle
when the vehicle is being jacked.
Jacking Instructions
WARNING!
Carefully follow these tire changing warn-
ings to help prevent personal injury or
damage to your vehicle:
• Always park on a firm, level surface as
far from the edge of the roadway as
possible before raising the vehicle.
• Turn on the Hazard Warning flashers.
• Block the wheel diagonally opposite the
wheel to be raised.
• Apply the parking brake firmly and shift
an automatic transmission to PARK.
• Never start or run the engine with the
vehicle on a jack.
• Do not let anyone sit in the vehicle when
it is on a jack.
• Do not get under the vehicle when it is
on a jack. If you need to get under a
raised vehicle, take it to a service center
where it can be raised on a lift.
• Only use the jack in the positions indi-
cated and for lifting this vehicle during a
tire change.
Wheel Blocked
191