engine JEEP GRAND CHEROKEE 2018 Owner handbook (in English)

NOTE:
If the fuel door does not latch after the
manual release cable has been activated, the
actuator latch should be manually returned to
the closed position.
REFUELING THE VEHICLE —
DIESEL ENGINE
1. Press the fuel filler door release switch
(located under the headlamp switch).
2. Open the fuel filler door.NOTE:
There is no fuel filler cap. A flapper door
inside the filler pipe seals the system.
Release Cable
Fuel Filler Door Release Switch
Fuel and Diesel Exhaust Fluid Fill Location
1 — Fuel Fill Location
2 — Diesel Exhaust Fluid Fill Location
179

WARNING!
• Never have any smoking materials lit in
or near the vehicle when the fuel door is
open or the tank is being filled.
• Never add fuel when the engine is run-
ning. This is in violation of most coun-
tries regulations and may cause the
“Malfunction Indicator Light” to turn
on.
• A fire may result if fuel is pumped into a
portable container that is inside of a
vehicle. You could be burned. Always
place fuel containers on the ground
while filling.
CAUTION!
To avoid fuel spillage and overfilling, do
not “top off” the fuel tank after filling.
Avoid Using Contaminated Fuel
Fuel that is contaminated by water or dirt can
cause severe damage to the engine fuel sys-
tem. Proper maintenance of the engine fuelfilter and fuel tank is essential. Refer to
“Dealer Service” in “Servicing And Mainte-
nance” in your Owner’s Manual for further
information.
Bulk Fuel Storage — Diesel Fuel
If you store quantities of fuel, good mainte-
nance of the stored fuel is also essential. Fuel
contaminated with water will promote the
growth of “microbes.” These microbes form
“slime” that will clog the fuel filtration sys-
tem and lines. Drain condensation from the
supply tank and change the line filter on a
regular basis.
NOTE:
When a diesel engine is allowed to run out of
fuel, air is pulled into the fuel system.
If the vehicle will not start, refer to “Dealer
Service / Priming If The Engine Has Run Out
Of Fuel” in “Servicing And Maintenance” in
your Owner’s Manual for further information.
WARNING!
Do not open the high pressure fuel system
with the engine running. Engine operation
WARNING!
causes high fuel pressure. High pressure
fuel spray can cause serious injury or
death.
Diesel Exhaust Fluid
Your vehicle is equipped with a Selective
Catalytic Reduction system to meet the very
stringent diesel emissions standards required
by the Environmental Protection Agency.
The purpose of the SCR system is to reduce
levels of NOx (oxides of nitrogen emitted from
engines) that are harmful to our health and
the environment to a near-zero level. A small
quantity of Diesel Exhaust Fluid (DEF) is
injected into the exhaust upstream of a cata-
lyst where, when vaporized, it converts smog-
forming nitrogen oxides (NOx) into harmless
nitrogen (N2) and water vapor (H2O), two
natural components of the air we breathe.
You can operate with the comfort that your
vehicle is contributing to a cleaner, healthier
world environment for this and generations to
come.
181

System Overview
This vehicle is equipped with a Diesel Ex-
haust Fluid (DEF) injection system and a
Selective Catalytic Reduction (SCR) catalyst
to meet the emission requirements.
The DEF injection system consists of the
following components:
• DEF tank
• DEF pump
• DEF injector
• Electronically-heated DEF lines
• NOx sensors
• Temperature sensors
• SCR catalyst
The DEF injection system and SCR catalyst
enable the achievement of diesel emissions
requirements; while maintaining outstanding
fuel economy, drivability, torque and power
ratings.Refer to “Instrument Cluster Display” in
“Getting To Know Your Instrument Panel” for
system messages and warnings.
NOTE:
• Your vehicle is equipped with a DEF injec-
tion system. You may occasionally hear an
audible clicking noise from under the ve-
hicle at a stop. This is normal operation.
• The DEF pump will run for a period of time
after engine shutdown to purge the DEF
system. This is normal operation and may
be audible from the rear of the vehicle.
Diesel Exhaust Fluid Storage
Diesel Exhaust Fluid (DEF) is considered a
very stable product with a long shelf life. If
DEF is kept in temperatures between 10° and
90°F (-12° and 32°C), it will last a minimum
of one year.
DEF is subject to freezing at the lowest tem-
peratures. For example, DEF may freeze at
temperatures at or below 12° F (-11° C). The
system has been designed to operate in this
environment.
NOTE:
When working with DEF, it is important to
know that:
• Any containers or parts that come into con-
tact with DEF must be DEF compatible
(plastic or stainless steel). Copper, brass,
aluminum, iron or non-stainless steel
should be avoided as they are subject to
corrosion by DEF.
• If DEF is spilled, it should be wiped up
completely.
STARTING AND OPERATING
182

CAUTION!
•To avoid DEF spillage, and possible dam-
age to the DEF tank from overfilling, do
not “top off” the DEF tank after filling.
• DO NOT OVERFILL. DEF will freeze be-
low 12ºF (-11ºC). The DEF system is
designed to work in temperatures below
the DEF freezing point, however, if the
tank is overfilled and freezes, the system
could be damaged.
• When DEF is spilled, clean the area
immediately with water and use an ab-
sorbent material to soak up the spills on
the ground.
• Do not attempt to start your engine if
DEF is accidentally added to the diesel
fuel tank as it can result in severe dam-
age to your engine, including but not
limited to failure of the fuel pump and
injectors.
CAUTION!
• Never add anything other than DEF to
the tank – especially any form of hydro-
carbon such as diesel fuel, fuel system
additives, gasoline, or any other
petroleum-based product. Even a very
small amount of these, less than
100 parts per million or less than 1 oz.
(30 ml) per 78 gallons (295 liters) will
contaminate the entire DEF system and
will require replacement. If owners use a
container, funnel or nozzle when refilling
the tank, it should either be new or one
that is has only been used for adding
DEF. Mopar provides an attachable
nozzle with its DEF for this purpose.3. Stop filling the DEF tank immediately
when any of the following happen: DEF
stops flowing from the fill bottle into the
DEF fill inlet, DEF splashes out the fill
inlet, or a DEF pump nozzle automatically
shuts off.
4. Reinstall cap onto DEF fill inlet.
STARTING AND OPERATING
184

TRAILER TOWING
Trailer Towing Weights (Maximum Trailer
Weight Ratings) — Non SRT
The following chart provides the maximum
trailer weight ratings towable for your given
drivetrain.
Engine/TransmissionMax. GTW (Gross Trailer Wt.) — with
Trailer BrakeMax. GTW (Gross Trailer Wt.) — without
Trailer BrakeTongue Wt. (See Note)
3.6L Gasoline — Standard
Cooling System3,500 lbs (1,588 kg) 1,653 lbs (750 kg) 174 lbs (79 kg)
3.6L Gasoline — Heavy
Duty Cooling System6,200 lbs (2,812 kg) 1,653 lbs (750 kg) 310 lbs (141 kg)
5.7L Gasoline — Standard
Cooling System5,000 lbs (2,268 kg) 1,653 lbs (750 kg) 250 lbs (113 kg)
5.7L Gasoline — Heavy
Duty Cooling System (ex-
cept Summit)7,716 lbs (3,500 kg) 1,653 lbs (750 kg) 386 lbs (175 kg)
5.7L Gasoline — Summit
Models With Heavy Duty
Cooling System6,500 lbs (2,949 kg) 1,653 lbs (750 kg) 386 lbs (175 kg)
185

Engine/TransmissionMax. GTW (Gross Trailer Wt.) — with
Trailer BrakeMax. GTW (Gross Trailer Wt.) — without
Trailer BrakeTongue Wt. (See Note)
3.0L Diesel All Wheel Drive ModelswithoutEngine Start Stop and Diesel Emission Fluid
All models except Summit 7,716 lbs (3,500 kg) 1,653 lbs (750 kg) 386 lbs (175 kg)
Summit Model 6,500 lbs (2,949 kg) 1,653 lbs (750 kg) 324 lbs (147 kg)
3.0L Diesel All Wheel Drive ModelswithEngine Start Stop and Diesel Emission Fluid
All models except Summit
and Trailhawk without skid
plate group7,716 lbs (3,500 kg) 1,653 lbs (750 kg) 386 lbs (175 kg)
All models except Summit
and Trailhawk with skid
plate group6,500 lbs (2,949 kg) 1,653 lbs (750 kg) 324 lbs (147 kg)
Summit and Trailhawk
models6,500 lbs (2,949 kg) 1,653 lbs (750 kg) 324 lbs (147 kg)
When towing a trailer the technically permissible laden weight may be exceeded by not more than 10% or 220 lbs (100 kg), whichever is lower
provided that the operating speed is restricted to 62 mph (100 km/h) or less.
NOTE:
The trailer tongue weight must be considered as part of the combined weight of occupants and cargo, and should never exceed the weight refer-
enced on the Tire and Loading Information placard. Refer to “Tires” in “Servicing And Maintenance” for further information.
STARTING AND OPERATING
186

Trailer Towing Weights (Maximum Trailer
Weight Ratings) — SRT
The following chart provides the maximum
trailer weight ratings towable for your given
drivetrain.
Engine/Transmission GCWR (Gross Combined Wt. Rating) Frontal Area Max. GTW (Gross Trailer Wt.) Max. Trailer Tongue Wt.
(See Note)
6.2L Supercharged
Automatic13,100 lbs (5,942 kg) 55 sq ft (5.11 sq m) 6,501 lbs (2,949 kg) 324 lbs (147 kg)
6.4L Automatic 13,003 lbs (5,898 kg) 55 sq ft (5.11 sq m) 6,501 lbs (2,949 kg) 324 lbs (147 kg)
When towing a trailer the technically permissible laden weight may be exceeded by not more than 10% or 220 lbs (100 kg), whichever is lower
provided that the operating speed is restricted to 62 mph (100 km/h) or less.
Refer to local laws for maximum trailer towing speeds.
NOTE:
The trailer tongue weight must be considered
as part of the combined weight of occupants
and cargo, and should never exceed the
weight referenced on the Tire and Loading
Information placard.
187

RECREATIONAL TOWING (BEHIND MOTORHOME, ETC.)
Towing This Vehicle Behind Another Vehicle
Towing Condition Wheels OFF The Ground Two-Wheel Drive Models Four-Wheel Drive Models
Without 4-LO RangeFour-Wheel Drive Models
With 4-LO Range
Flat Tow NONE NOT ALLOWED NOT ALLOWEDSee Instructions
•
Transmission in PARK
• Transfer case in NEU-
TRAL (N)
• Tow in forward direction
Dolly Tow FrontNOT ALLOWED NOT ALLOWED NOT ALLOWED
Rear OKNOT ALLOWED NOT ALLOWED
On Trailer ALL OK OK OK
NOTE:
Recreational towing is not allowed on SRT ve-
hicles.
These vehicles may be towed on a flatbed or
vehicle trailer provided all four wheels areOFF
the ground.NOTE:
• When towing your vehicle, always follow
applicable state and provincial laws. Con-
tact state and provincial Highway Safety
offices for additional details.
• Vehicles equipped with Quadra-Lift must
be placed in Transport Mode before tying
them down (from the body) on a trailer or
flatbed truck. Refer to “Quadra-Lift” in“Starting and Operating” for more informa-
tion. If the vehicle cannot be placed in
Transport mode (for example, engine will
not run), tie-downs should be fastened over
the tires using specific straps (not to the
body). Failure to follow these instructions
may cause fault codes to be set and/or
cause loss of proper tie-down tension.
191

Recreational Towing-Two Wheel Drive
Models
DO NOT flat tow this vehicle. Damage to the
drivetrain will result.
Recreational towing (for two-wheel drive
models) is allowed ONLY if the rear wheels
are OFF the ground. This may be accom-
plished using a tow dolly or vehicle trailer. If
using a tow dolly, follow this procedure:
1. Properly secure the dolly to the tow ve-
hicle, following the dolly manufacturer's
instructions.
NOTE:
If vehicle is equipped with Quadra-Lift air
suspension, ensure the vehicle is set to
Normal Ride Height.
2. Drive the rear wheels onto the tow dolly.
3. Firmly apply the parking brake. Shift the
transmission into PARK.
4. Turn the ignition OFF.
5. Properly secure the rear wheels to the
dolly, following the dolly manufacturer’s
instructions.6. Turn the ignition to the ON/RUN mode,
but do not start the engine.
7. Confirm that the steering column is
unlocked.
8. Install a suitable clamping device, de-
signed for towing, to secure the front
wheels in the straight position.
9. Disconnect the negative battery cable,
and secure it away from the battery post.
NOTE:
Disconnecting your vehicle battery will
erase radio presets and may affect other
vehicle settings. It may also trigger vari-
ous fault codes, causing MIL illumination
when the battery is reconnected.
CAUTION!
Towing with the rear wheels on the ground
will cause severe transmission damage.
Damage from improper towing is not cov-
ered under the New Vehicle Limited War-
ranty.
Recreational Towing — Quadra-Trac I
(Single-Speed Transfer Case) Four-Wheel
Drive Models
Recreational towing is not allowed.These
models do not have a NEUTRAL (N) position
in the transfer case.
NOTE:
This vehicle may be towed on a flatbed or
vehicle trailer provided all four wheels areOFF
the ground.
CAUTION!
Towing this vehicle in violation of the
above requirements can cause severe
transmission and/or transfer case damage.
Damage from improper towing is not cov-
ered under the New Vehicle Limited War-
ranty.STARTING AND OPERATING
192

Recreational Towing — Quadra–Trac II/
Quadra–Drive II Four-Wheel Drive Models
The transfer case must be shifted into NEU-
TRAL (N) and the transmission must be in
PARK for recreational towing. The NEUTRAL
(N) selection button is adjacent to the trans-
fer case selector switch. Shifts into and out of
transfer case NEUTRAL (N) can take place
with the selector switch in any mode position.
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 dam-
age. Tow with all four wheels either ON
the ground, or OFF the ground (using a
vehicle trailer).
• Tow only in a forward direction. Towing
this vehicle backwards can cause severe
damage to the transfer case.
• The transmission must be in PARK for
recreational towing.
• Before recreational towing, perform the
procedure outlined under “Shifting into
CAUTION!
NEUTRAL (N)” to be certain that the
transfer case is fully in NEUTRAL (N).
Otherwise, internal damage will result.
• 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)
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 trans-
WARNING!
mission is in PARK. The parking brake
should always be applied when the driver
is not in the vehicle.
Use the following procedure to prepare your
vehicle for recreational towing.
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, with the engine running.
2. Press and hold the brake pedal.
3. Shift the transmission into NEUTRAL.
4. If vehicle is equipped with Quadra-Lift air
suspension, ensure the vehicle is set to
Normal Ride Height.
193