2018 JEEP WRANGLER UNLIMITED engine

Cavity Cartridge Fuse Micro Fuse Description
F22 – 10 Amp Red Engine Control Module (ECM)/Powertrain Control Module
(PCM)/Motor Generator Unit (MGU) WAKE UP/Power
Pack Unit (PPU) WAKE UP
(*)
F23 – 10 Amp Red Powertrain Control Module (PCM)/Engine Control Module
(ECM)
(*)
F24 – – Spare
F25 – 10 Amp Red Module Shift By Wire (MOD_SBW)
(*)
F26 40 Amp Green – Central Body Controller (CBC) 2-EXTERIOR LIGHTS #1
F27 30 Amp Pink – Front Wipers
F28 40 Amp Green – Central Body Controller (CBC) 3-POWER LOCKS
F29 40 Amp Green – Central Body Controller (CBC) 4-EXTERIOR LIGHTS #2
F30 – – Spare
F31 – 10 Amp Red DIAGNOSTIC PORT
(*)
F32 – 10 Amp Red Heating Ventilation Air Conditioning Mod (HVAC CTRL
MOD)/Steering Column Lock (SCL)/Occupant Classifica-
tion Module (OCM)/Driver Presence Detection Module
(DPDM)
(*)
F33 – 10 Amp Red ParkTronics System (PTS)/Infrared Camera Module
(IRCM)/Airbag Disable Lamps (AIRBAG DISABLE LMPS)
(*)
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Cavity Cartridge Fuse Micro Fuse Description
F34 – 10 Amp Red Electronic Stability Control (ESC)/Electric Hydraulic
Power Steering (EHPS)/Smart Bar Control Module
(SBCM) WAKE UP
(*)
F35 30 Amp Pink – BRAKE VAC PMP — If Equipped
(*)
F36 30 Amp Pink – TRAILER TOW MOD — If Equipped
F37 30 Amp Pink – TRAILER TOW CONN 7W — If Equipped
F38 20 Amp Blue – Engine Control Module ECM
(*)
F39 – – Spare
F40 – 15 Amp Blue DriveTrain Control Module (DTCM)/Axle Lock (AXLE LOC)
FT_RR
(*)
F41 – 15 Amp Blue Instrument Cluster (IC)/Security GateWay (SGW) WAKE
UP
(*)
F42 – 10 Amp Red Power Control Relay Control Feed (Electric Stop/Start)/
Spare (Belt Starter Generator) -- If Equipped
(*)
F43 20 Amp Yellow PWR OUTLET (CARGO) BATT
(*)
F44 – 10 Amp Red InfraRed Camera (IRCAM) HEATERS
(*)
F45 – 20 Amp Yellow PWR OUTLET (CARGO) IGN*
(*)
IN CASE OF EMERGENCY
184

WARNING!
• Being under a jacked-up vehicle is dan-
gerous. 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 cargo area. To remove jack and tools
proceed as follows:
1. Lift the load floor in the cargo area.NOTE:
The load floor can be removed for easier
access by pulling the load floor directly
rearward.
2. Remove the hardware storage cover by
pinching the latch on the left side and
pulling upward.
3. Turn the black plastic wing nut counter-
clockwise to loosen the jack from the
storage bin.
4. Remove tool kit and assemble tools.
Spare Tire Removal
1. To remove the spare tire from the carrier,
remove the tire cover, if equipped.
NOTE:
The spare wheel is mounted on the out-
side of the tailgate, protected by a plastic
cover with fasteners. Under traffic regula-
tions, the cover must not be removed or
insecurely fixed during use of the vehicle
on the public highway. Reference should
be made to local laws and regulations. Ifthe spare wheel is used, before continuing
your journey check that the damaged
wheel is securely mounted and the cover
is correctly fixed in place. Also take care
not to obstruct the rear camera.
2. Remove the Rear Camera Cover by turning
the lock bolt to the left with the #T40 Torx
head driver and ratchet from the supplied
tool kit.
3. Remove the lug nuts with the lug wrench
turning them counterclockwise. If
equipped, remove the locking lug nut with
the lock key (located in the glove box)
turning it counterclockwise.
Stowing The Replaced Spare Tire
1. Mount the spare tire onto the carrier.
Torque down lug nuts and locking lug nut.
2. Return the lock bolt to the lock position
on the camera cover by turning the lock to
the right using the provided #T40 Torx
head driver and ratchet. Then, reinstall
the camera cover by slipping it over the
camera/tire carrier until it snaps into
place.
IN CASE OF EMERGENCY
190

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

Jack Usage Precautions
To complete the Use and Maintenance Hand-
book to which this supplement is attached,
given below are some instructions on the
proper use of the jack.
WARNING!
When using the crank, make sure it turns
freely without the risk of scraping hands
against the ground.
Even the moving parts of the jack, the
“worm screw” and joints can cause inju-
ries: avoid contact with them. Clean it
thoroughly if dirtied with grease.
CAUTION!
The jack is a tool designed exclusively for
changing a wheel, in case of a puncture or
damage to a tire of the vehicle on which it
is fitted or on vehicles of the same model.
Any other use, e.g. to jack up other vehicle
models or different things, is strictly pro-
hibited. Never use it to carry out mainte-
nance or repairs under the vehicle or to
CAUTION!
change summer/winter wheels and vice
versa. Never go under the raised vehicle. If
any work under the vehicle is necessary,
contact an authorized dealer. Incorrect
placing of the jack can cause the vehicle to
drop: use it only in the positions indicated.
Do not use the jack for loads higher than
that specified on the label. Never start the
engine with vehicle raised. If the vehicle is
raised more than necessary, everything
can become more unstable, with the risk
of the vehicle dropping violently. Therefore
raise the vehicle only as much as neces-
sary for the wheel/spare.
Maintenance
• Make sure grime does not build up on the
“worm screw.”
• Keep the “worm screw” lubricated.
• Never modify the jack.
Conditions Of Non-Use:
• Temperatures below −40°C.
• On sandy or muddy ground.
• On uneven ground.• On steep roads.
• In extreme weather conditions: thunder-
storms, typhoons, hurricanes, blizzards,
storms, etc.
NOTE:
•The jack requires no adjustment.
• The jack cannot be repaired, and in the
event of a fault, it must be replaced by
another genuine one.
• No tool other than its cranking device may
be fitted on the jack.
JUMP STARTING
If your vehicle has a discharged battery, it can
be jump started using a set of jumper cables
and a battery in another vehicle, or by using a
portable battery booster pack. Jump starting
can be dangerous if done improperly, so please
follow the procedures in this section carefully.
WARNING!
Do not attempt jump starting if the battery
is frozen. It could rupture or explode and
cause personal injury.
IN CASE OF EMERGENCY
196

CAUTION!
Do not use a portable battery booster pack
or any other booster source with a system
voltage greater than 12 Volts or damage to
the battery, starter motor, alternator or
electrical system may occur.
NOTE:
When using a portable battery booster pack,
follow the manufacturer's operating instruc-
tions and precautions.
Preparations For Jump Start
The battery in your vehicle is located in the
left rear of the engine compartment, behind
the Power Distribution Center.NOTE:
The positive battery post is covered with a
protective cap. Lift up on the cap to gain
access to the post.
WARNING!
• Take care to avoid the radiator cooling
fan whenever the hood is raised. It can
start anytime the ignition switch is ON.
You can be injured by moving fan blades.
WARNING!
• Remove any metal jewelry such as rings,
watch bands and bracelets that could
make an inadvertent electrical contact.
You could be seriously injured.
• Batteries contain sulfuric acid that can
burn your skin or eyes and generate
hydrogen gas which is flammable and
explosive. Keep open flames or sparks
away from the battery.
NOTE:
Never use a fast battery charger to start the
engine, as this could damage the electronic
systems of your vehicle, particularly the igni-
tion and engine fuel supply control units.
1. Apply the parking brake, shift the auto-
matic transmission into PARK and turn
the ignition OFF.
2. Turn off the heater, radio, and all unnec-
essary electrical accessories.
3. If using another vehicle to jump start the
battery, park the vehicle within the jumper
cable’s reach, apply the parking brake and
make sure the ignition is OFF.
Positive Battery Post
197

WARNING!
Do not allow vehicles to touch each other
as this could establish a ground connec-
tion and personal injury could result.
Jump Starting Procedure
WARNING!
Failure to follow this jump starting proce-
dure could result in personal injury or
property damage due to battery explosion.
CAUTION!
Failure to follow these procedures could
result in damage to the charging system of
the booster vehicle or the discharged ve-
hicle.
NOTE:
Make sure at all times that unused ends of
jumper cables are not contacting each other
or either vehicle while making connections.Connecting The Jumper Cables
1. Connect the positive(+)end of the jumper
cable to the remote positive(+)post of the
discharged vehicle.
2. Connect the opposite end of the positive
(+)jumper cable to the positive(+)post of
the booster battery.
3. Connect the negative end(-)of the jumper
cable to the negative(-)post of the
booster battery.
4. Connect the opposite end of the negative
(-)jumper cable to a good engine ground
(exposed metal part of the discharged
vehicle’s engine) away from the battery
and the fuel injection system.
WARNING!
Do not connect the jumper cable to the
negative (-) post of the discharged battery.
The resulting electrical spark could cause
the battery to explode and could result in
personal injury. Only use the specific
ground point, do not use any other exposed
metal parts.5. Start the engine in the vehicle that has
the booster battery, let the engine idle a
few minutes, and then start the engine in
the vehicle with the discharged battery.
CAUTION!
Do not run the booster vehicle engine
above 2,000 rpm since it provides no
charging benefit, wastes fuel, and can
damage booster vehicle engine.
6. Once the engine is started, remove the
jumper cables in the reverse sequence:
Disconnecting The Jumper Cables
1. Disconnect the negative(-)end of the
jumper cable from the engine ground of
the vehicle with the discharged battery.
2. Disconnect the opposite end of the nega-
tive(-)jumper cable from the negative(-)
post of the booster battery.
3. Disconnect the positive(+)end of the
jumper cable from the positive(+)post of
the booster battery.
IN CASE OF EMERGENCY
198

4. Disconnect the opposite end of the posi-
tive(+)jumper cable from the remote
positive(+)post of the discharged
vehicle.
5. Reinstall the protective cover over the
remote positive(+)post of the discharged
vehicle.
If frequent jump starting is required to start
your vehicle you should have the battery and
charging system tested at an authorized
dealer.
CAUTION!
Accessories plugged into the vehicle
power outlets draw power from the vehi-
cle’s battery, even when not in use (i.e.,
cellular devices, etc.). Eventually, if
plugged in long enough without engine
operation, the vehicle’s battery will dis-
charge sufficiently to degrade battery life
and/or prevent the engine from starting.
IF YOUR ENGINE
OVERHEATS
In any of the following situations, you can
reduce the potential for overheating by taking
the appropriate action.
• On the highways — slow down.
• In city traffic — while stopped, shift trans-
mission into NEUTRAL, but do not increase
engine idle speed.
CAUTION!
Driving with a hot cooling system could
damage your vehicle. If the temperature
gauge reads HOT (H), pull over and stop
the vehicle. Idle the vehicle with the air
conditioner turned off until the pointer
drops back into the normal range. If the
pointer remains on HOT (H), and you hear
continuous chimes, turn the engine off
immediately and call for service.NOTE:
There are steps that you can take to slow
down an impending overheat condition:
• If your air conditioner (A/C) is on, turn it off.
The A/C system adds heat to the engine
cooling system and turning the A/C off can
help remove this heat.
• You can also turn the temperature control to
maximum heat, the mode control to floor
and the blower control to high. This allows
the heater core to act as a supplement to
the radiator and aids in removing heat from
the engine cooling system.WARNING!
You or others can be badly burned by hot
engine coolant (antifreeze) or steam from
your radiator. If you see or hear steam
coming from under the hood, do not open
the hood until the radiator has had time to
cool. Never try to open a cooling system
pressure cap when the radiator or coolant
bottle is hot.
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