engine JEEP WRANGLER 2017 JK / 3.G Repair Manual

4. Turn the ignition to the ON/RUN position, but do notstart the engine.
5. Press and hold the brake pedal.
6. Shift the transmission into NEUTRAL.
7. 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.
8. Shift the automatic transmission into PARK, or place manual transmission in NEUTRAL.
9. Release the brake pedal.
10. Disconnect vehicle from the tow vehicle.
11. Start the engine.
12. Press and hold the brake pedal.
13. Release the parking brake.
14. Shift the transmission into gear, release the brake pedal (and clutch pedal on manual transmissions), and check
that the vehicle operates normally.DRIVING TIPS
On-Road Driving Tips
Utility vehicles have higher ground clearance and a nar-
rower track to make them capable of performing in a wide
variety of off-road applications. Specific design character-
istics give them a higher center of gravity than conven-
tional passenger cars.
An advantage of the higher ground clearance is a better
view of the road, allowing you to anticipate problems.
They are not designed for cornering at the same speeds as
conventional passenger cars any more than low-slung
sports cars are designed to perform satisfactorily in off-
road conditions. Avoid sharp turns or abrupt maneuvers.
As with other vehicles of this type, failure to operate this
vehicle correctly may result in loss of control or vehicle
rollover.
330 STARTING AND OPERATING

Driving In Snow, Mud And Sand
Snow
In heavy snow or for additional control and traction at
slower speeds, shift the transmission into a low gear and
the transfer case into 4L (Low) if necessary. Do not shift to
a lower gear than necessary to maintain headway. Over-
revving the engine can spin the wheels and traction will be
lost. If you start to slow to a stop, try turning your steering
wheel no more than a 1/4 turn quickly back and forth,
while still applying throttle. This will allow the tires to get
a freshbiteand help maintain your momentum.
CAUTION!
On icy or slippery roads, do not downshift at high
engine RPM or vehicle speeds, because engine braking
may cause skidding and loss of control.
Mud
Deep mud creates a great deal of suction around the tires and
is very difficult to get through. You should use second gear
(manual transmission), or DRIVE (automatic transmission),
with the transfer case in the 4L (Low) position to maintain
your momentum. If you start to slow to a stop, try turning
your steering wheel no more than a 1/4 turn quickly back and forth for additional traction. Mud holes pose an in-
creased threat of vehicle damage and getting stuck. They are
normally full of debris from previous vehicles getting stuck.
As a good practice before entering any mud hole, get out and
determine how deep it is, if there are any hidden obstacles
and if the vehicle can be safely recovered if stuck.
Sand
Soft sand is very difficult to travel through with full tire
pressure. When crossing soft, sandy spots in a trail, main-
tain your vehicle’s momentum and do not stop. The key to
driving in soft sand is using the appropriate tire pressure,
accelerating slowly, avoiding abrupt maneuvers and main-
taining the vehicle’s momentum. If you are going to be
driving on large soft sandy areas or dunes, reduce your tire
pressure to a minimum of 15 psi (103 kPa) to allow for a
greater tire surface area. Reduced tire pressure will drasti-
cally improve your traction and handling while driving on
the soft sand, but you must return the tires to normal air
pressure before driving on pavement or other hard sur-
faces. Be sure you have a way to reinflate the tires prior to
reducing the pressure.
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STARTING AND OPERATING 333

Hill Climbing
Hill climbing requires good judgment and a good under-
standing of your abilities and your vehicle’s limitations.
Hills can cause serious problems. Some are just too steep to
climb and should not be attempted. You should always feel
confident with the vehicle and your abilities. You should
always climb hills straight up and down. Never attempt to
climb a hill on an angle.
Before Climbing A Steep Hill
As you approach a hill, consider its grade or steepness.
Determine if it is too steep. Look to see what the traction is
on the hill side trail. Is the trail straight up and down?
What is on top and the other side? Are there ruts, rocks,
branches or other obstacles on the path? Can you safely
recover the vehicle if something goes wrong? If everything
looks good and you feel confident, shift the transmission
into a lower gear with 4L (Low) engaged, and proceed with
caution, maintaining your momentum as you climb the
hill.
Driving Up Hill
Once you have determined your ability to proceed and
have shifted into the appropriate gear, line your vehicle up
for the straightest possible run. Accelerate with an easyconstant throttle and apply more power as you start up the
hill. Do not race forward into a steep grade; the abrupt
change of grade could cause you to lose control. If the front
end begins to bounce, ease off the throttle slightly to bring
all four tires back on the ground. As you approach the crest
of the hill, ease off the throttle and slowly proceed over the
top. If the wheels start to slip as you approach the crest of
a hill, ease off the accelerator and maintain headway by
turning the steering wheel no more than a 1/4 turn quickly
back and forth. This will provide a fresh
biteinto the
surface and will usually provide enough traction to com-
plete the climb. If you do not make it to the top, place the
vehicle in REVERSE and back straight down the grade
using engine resistance along with the vehicle brakes.
WARNING!
Never attempt to climb a hill at an angle or turn around
on a steep grade. Driving across an incline increases
the risk of a rollover, which may result in severe injury.
Driving Downhill
Before driving down a steep hill, you need to determine if
it is too steep for a safe descent. What is the surface
traction? Is the grade too steep to maintain a slow, con-
trolled descent? Are there obstacles? Is it a straight descent?
336 STARTING AND OPERATING

Is there plenty of distance at the base of the hill to regain
control if the vehicle descends to fast? If you feel confident
in your ability to proceed, then make sure you are in 4L
(Low) and proceed with caution. Allow engine braking to
control the descent and apply your brakes, if necessary, but
do not allow the tires to lock.
WARNING!
Do not descend a steep grade in NEUTRAL. Use
vehicle brakes in conjunction with engine braking.
Descending a grade too fast could cause you to lose
control and be seriously injured or killed.
Driving Across An Incline
If at all possible, avoid driving across an incline. If it is
necessary, know your vehicle’s abilities. Driving across an
incline places more weight on the downhill wheels, which
increases the possibilities of a downhill slide or rollover.
Make sure the surface has good traction with firm and
stable soils. If possible, transverse the incline at an angle
heading slightly up or down.
WARNING!
Driving across an incline increases the risk of a roll-
over, which may result in severe injury.
If You Stall Or Begin To Lose Headway
If you stall or begin to lose headway while climbing a steep
hill, allow your vehicle to come to a stop and immediately
apply the brake. Restart the engine and shift into RE-
VERSE. Back slowly down the hill allowing engine braking
to control the descent and apply your brakes, if necessary,
but do not allow the tires to lock.
WARNING!
If the engine stalls or you lose headway or cannot
make it to the top of a steep hill or grade, never attempt
to turn around. To do so may result in tipping and
rolling the vehicle, which may result in severe injury.
Always back carefully straight down a hill in RE-
VERSE. Never back down a hill in NEUTRAL using
only the vehicle brakes. Never drive diagonally across
a hill, always drive straight up or down.
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STARTING AND OPERATING 337

Driving Through Water
Extreme care should be taken crossing any type of water.
Water crossings should be avoided, if possible, and only be
attempted when necessary in a safe, responsible manner.
You should only drive through areas which are designated
and approved. You should tread lightly and avoid damage
to the environment. You should know your vehicle’s
abilities and be able to recover it if something goes wrong.
You should never stop or shut a vehicle off when crossing
deep water unless you ingested water into the engine air
intake. If the engine stalls, do not attempt to restart it.
Determine if it has ingested water first. The key to any
crossing is low and slow. Shift into first gear (manual
transmission), or DRIVE (automatic transmission), with the
transfer case in the 4L (Low) position and proceed very
slowly with a constant slow speed {3 to 5 mph (5 to 8
km/h) maximum} and light throttle. Keep the vehicle
moving; do not try to accelerate through the crossing. After
crossing any water higher than the bottom of the axle
differentials, you should inspect all of the vehicle fluids for
signs of water ingestion.
CAUTION!
•Water ingestion into the axles, transmission, transfer
case, engine or vehicle interior can occur if you drive
too fast or through too deep of water. Water can cause
permanent damage to engine, driveline or other
vehicle components, and your brakes will be less
effective once wet and/or muddy.
• This vehicle is capable of crossing through water at a
depth of 30 inches (76 cm) at speeds no greater than
5 mph (8 km/h). Water ingestion can occur causing
damage to your vehicle.
Before You Cross Any Type Of Water
As you approach any type of water, you need to determine
if you can cross it safely and responsibly. If necessary, get
out and walk through the water or probe it with a stick.
You need to be sure of its depth, approach angle, current
and bottom condition. Be careful of murky or muddy
waters; check for hidden obstacles. Make sure you will not
be intruding on any wildlife, and you can recover the
vehicle if necessary. The key to a safe crossing is the water
depth, current and bottom conditions. On soft bottoms, the
338 STARTING AND OPERATING

IN CASE OF EMERGENCY
CONTENTS
HAZARD WARNING FLASHERS ............342
 BULB REPLACEMENT ....................342
▫ Replacement Bulbs .....................342
▫ Bulb Replacement ..................... .343
 FUSES ............................... .346
▫ General Information .....................347
▫ Totally Integrated Power Module ...........348
 JACKING AND TIRE CHANGING ...........353
▫ Jack Location ........................ .353
▫ Spare Tire Removal .....................354
▫ Preparations For Jacking .................354
▫ Jacking Instructions .....................355
▫ Road Tire Installation ....................357
 JUMP-STARTING ....................... .358▫
Preparations For Jump-Start ...............359
▫ Jump-Starting Procedure ..................360
 IF YOUR ENGINE OVERHEATS .............361
 GEAR SELECTOR OVERRIDE ..............362
 FREEING A STUCK VEHICLE ..............363
 TOWING A DISABLED VEHICLE ............365
▫ Without The Ignition Key .................366
▫ Four–Wheel Drive Models ................366
▫ Emergency Tow Hooks — If Equipped .......367
 ENHANCED ACCIDENT RESPONSE SYSTEM
(EARS) .............................. .368
 EVENT DATA RECORDER (EDR) ............368
7

Center High-Mounted Stop Lamp (CHMSL)
The stop lamp is mounted on a bracket that extends
upward from the tailgate behind the spare tire. If service is
needed, obtain the LED/Cover Assembly from your local
authorized dealer.
1. Remove the spare tire.
2. Remove the four screws holding the lens/cover in placeon the spare tire carrier.
3. Disconnect the wire harness from the back of the LED cover.
FUSES
WARNING!
•When replacing a blown fuse, always use an appro-
priate replacement fuse with the same amp rating as
the original fuse. Never replace a fuse with another
fuse of higher amp rating. Never replace a blown
fuse with metal wires or any other material. Failure
to use proper fuses may result in serious personal
injury, fire and/or property damage.
• Before replacing a fuse, make sure that the ignition is
off and that all the other services are switched off
and/or disengaged.
• If the replaced fuse blows again, contact an autho-
rized dealer.
• If a general protection fuse for safety systems (air
bag system, braking system), power unit systems
(engine system, gearbox system) or steering system
blows, contact an authorized dealer.
346 IN CASE OF EMERGENCY

General Information
The fuses protect electrical systems against excessive cur-
rent.
When a device does not work, you must check the electri-
cal circuit inside the fuse for a break/melt.
Also, please be aware that when using power outlets for
extended periods of time with the engine off may result in
vehicle battery discharge.
Blade Fuses
1 — Electrical Circuit
2 — Blade Fuse With Good Electrical Circuit
3 — Blade Fuse With Bad Electrical Circuit
7
IN CASE OF EMERGENCY 347

Totally Integrated Power Module
The Totally Integrated Power Module is located in the
engine compartment near the battery. This center contains
cartridge fuses, mini fuses, and relays. A label that identi-
fies each component is printed on the inside of the cover.
CavityCartridge Fuse Mini Fuse Description
J1 –– –
J2 30 Amp Pink –Transfer Case Module
J3 –– –
J4 25 Amp Clear –Driver Door Node
J5 25 Amp Clear –Passenger Door Node
J6 40 Amp Green –Anti-Lock Brake System (ABS) Pump/
Stability Control System
J7 30 Amp Pink –Anti-Lock Brake System (ABS) Valve/
Stability Control System
J8 –– –
Totally Integrated Power Module
348 IN CASE OF EMERGENCY

JACKING AND TIRE CHANGING
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 the danger of being hit when
operating the jack or changing the wheel.
• Being under a jacked-up vehicle is dangerous. The
vehicle could slip off the jack and fall on you. You
could be crushed. Never put any part of your body
under a vehicle that 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.
• Never start or run the engine while the vehicle is on
a jack.
• The jack is designed to be used as a tool for changing
tires only. The jack should not be used to lift the
vehicle for service purposes. The vehicle should be
jacked on a firm level surface only. Avoid ice or
slippery areas.
Jack Location
The jack and lug wrench are located in the rear storage
compartment.
Jack Storage
7
IN CASE OF EMERGENCY 353