one JEEP CHEROKEE TRAILHAWK 2019 Service Manual

•Inspect the radiator for mud and debris and clean as
required.
• Check threaded fasteners for looseness, particularly on
the chassis, drivetrain components, steering, and sus-
pension. Retighten them, if required, and torque to the
values specified in the Service Manual.
• Check for accumulations of plants or brush. These things
could be a fire hazard. They might hide damage to fuel
lines, brake hoses, axle pinion seals, and propeller shafts.
• After extended operation in mud, sand, water, or similar
dirty conditions, have the radiator, fan, brake rotors,
wheels, brake linings, and axle yokes inspected and
cleaned as soon as possible.

WARNING!
ALWAYS obey traffic laws and pay attention to the
road. ALWAYS drive safely with your hands on the
steering wheel. You have full responsibility and as-
sume all risks related to the use of the features and
applications in this vehicle. Only use the features and
applications when it is safe to do so. Failure to do so
may result in an accident involving serious injury or
death.
NOTE:
• Your vehicle may be transmitting data as authorized by
the subscriber.
• The SOS and ASSIST buttons will only function if you
are connected to an operable LTE (voice/data) or 4G
(data) network. Other Uconnect services will only be
operable if your SiriusXM Guardian service is active and
you are connected to an operable LTE (voice/data) or 4G
(data) network. ASSIST Call
The ASSIST Button is used to automatically connect you to
any one of the following support centers:
•
Roadside Assistance – If you get a flat tire, or need a tow,
just push the ASSIST button and you’ll be connected to
someone who can help. Roadside Assistance will know
what vehicle you’re driving and its location. Additional
fees may apply for roadside assistance.
• SiriusXM Guardian Customer Care – In-vehicle support
for SiriusXM Guardian.
• Vehicle Customer Care – Total support for all other
vehicle issues.
SOS Call
1. Push the SOS Call button on the Rearview Mirror.
NOTE: In case the SOS Call button is pushed in error, there
will be a ten second delay before the SOS Call system
initiates a call to a SOS operator. To cancel the SOS Call
connection, push the SOS call button on the Rearview
Mirror or press the cancellation button on the Device
Screen. Termination of the SOS Call will turn off the green
LED light on the Rearview Mirror.
394 IN CASE OF EMERGENCY

WARNING!(Continued)
•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 indicated and for
lifting this vehicle during a tire change.
• If working on or near a roadway, be extremely
careful of motor traffic.
• To assure that spare tires, flat or inflated, are securely
stowed, spares must be stowed with the valve stem
facing the ground.
CAUTION!
Do not attempt to raise the vehicle by jacking on
locations other than those indicated in the Jacking
Instructions for this vehicle.
1. Remove the spare tire, jack, wheel chocks, and wheel bolt wrench.
2. If equipped with aluminum wheels where the center cap covers the wheel bolts, use the wheel bolt wrench to pry
the center cap off carefully before raising the vehicle.

NOTE:Refer to section “(F) Sealant Bottle And Hose
Replacement” in “Sealing A Tire With Tire Service Kit” in
this section.
• The Sealant Bottle (1) and Sealant Hose (6) are a one tire
application use and need to be replaced after each use.
Always replace these components immediately at your
original equipment vehicle dealer.
• When the Tire Service Kit sealant is in a liquid form,
clean water and a damp cloth will remove the material from the vehicle or tire and wheel components. Once the
sealant dries, it can easily be peeled off and properly
discarded.
• For optimum performance, make sure the valve stem on
the wheel is free of debris before connecting the Tire
Service Kit.
• You can use the Tire Service Kit air pump to inflate
bicycle tires. The kit also comes with two needles,
located in the Accessory Storage Compartment (on the
bottom of the air pump) for inflating sport balls, rafts, or
similar inflatable items. However, use only the Air Pump
Hose (7) and make sure the Mode Select Knob (5) is in
the Air Mode when inflating such items to avoid inject-
ing sealant into them. The Tire Service Kit Sealant is only
intended to seal punctures less than 1/4 inch (6 mm)
diameter in the tread of your vehicle.
• Do not lift or carry the Tire Service Kit by the hoses.

CAUTION!
•The metal end fitting from Power Plug (8) may get
hot after use, so it should be handled carefully.
• Failure to reinstall the cap on the fitting at the end of
the Sealant Hose (6) can result in sealant contacting
your skin, clothing, and the vehicle’s interior. It can
also result in sealant contacting internal Tire Service
Kit components which may cause permanent damage
to the kit.
(D) Drive Vehicle:
Immediately after injecting sealant and inflating the tire,
drive the vehicle 5 miles (8 km) or ten minutes to ensure
distribution of the Tire Service Kit Sealant within the tire.
Do not exceed 50 mph (80 km/h).

6. Verify that the cap is installed on the fitting at the end ofthe Sealant Hose (3) and return the hose to its storage
area (located on top of the housing).
7. Return the Tire Service Kit to its storage location in the vehicle.
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.
NOTE: When using a portable battery booster pack, follow
the manufacturer ’s operating instructions and precautions.
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.
Preparations For Jump Start
The battery in your vehicle is located in the front of the
engine compartment, behind the left headlight assembly.

Mileage or time passed (whichever comes first)
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
Or Years: 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
32,000
48,000
64,000
80,000
96,000
112,000
128,000
144,000
160,000
176,000
192,000
208,000
224,000
240,000
Inspect front accessory drive belt, tensioner, idler pul-
ley, and replace if necessary. X
Additional Maintenance
Replace engine air cleaner filter. XX X X X
Replace air conditioning/cabin air filter. X X X X X X X
Replace spark plugs — 2.0L Engine** XX
Replace spark plugs — 2.4L & 3.2L Engine** X
Flush and replace the engine coolant at 10 years or
150,000 miles (240,000 kmyf whichever comes first. XX
Inspect and replace PCV valve if necessary. X
** The spark plug change interval is mileage based only,
yearly intervals do not apply.

WARNING!(Continued)
service job, take your vehicle to a competent me-
chanic.
• Failure to properly inspect and maintain your vehicle
could result in a component malfunction and effect
vehicle handling and performance. This could cause
an accident.
Heavy Duty Use Of The Vehicle
Change engine oil at 4,000 miles (6,500 km) or 350 hours of
engine run time if the vehicle is operated in a dusty and off
road environment or is operated predominately at idle or
only very low engine RPM’s. This type of vehicle use is
considered Severe Duty.
454 SERVICING AND MAINTENANCE

WARNING!
•Use only refrigerants and compressor lubricants ap-
proved by the manufacturer for your air conditioning
system. Some unapproved refrigerants are flam-
mable and can explode, injuring you. Other unap-
proved refrigerants or lubricants can cause the sys-
tem to fail, requiring costly repairs. Refer to
Warranty Information Book, located in your owner ’s
information kit, for further warranty information.
• The air conditioning system contains refrigerant un-
der high pressure. To avoid risk of personal injury or
damage to the system, adding refrigerant or any
repair requiring lines to be disconnected should be
done by an experienced technician.
CAUTION!
Do not use chemical flushes in your air conditioning
system as the chemicals can damage your air condition-
ing components. Such damage is not covered by the
New Vehicle Limited Warranty.
Refrigerant Recovery And Recycling R-134a — If
Equipped
R-134a Air Conditioning Refrigerant is a hydrofluoro-
carbon (HFC) that is an ozone-friendly substance. The
manufacturer recommends that air conditioning service be
performed by an authorized dealer or other service facili-
ties using recovery and recycling equipment.
NOTE: Use only manufacturer approved A/C system PAG
compressor oil and refrigerants.
Refrigerant Recovery And Recycling R-1234yf — If
Equipped
R–1234yf Air Conditioning Refrigerant is a hydrofluo-
roolefin (HFO) that is endorsed by the Environmental
Protection Agency and is an ozone-friendly substance with
a low global-warming potential. The manufacturer recom-
mends that air conditioning service be performed by an
authorized dealer using recovery and recycling equipment.
NOTE: Use only manufacturer approved A/C system
PAG compressor oil, and refrigerants.8
SERVICING AND MAINTENANCE 467

have an authorized technician inspect the complete ex-
haust system and adjacent body areas for broken, dam-
aged, deteriorated, or mispositioned parts. Open seams or
loose connections could permit exhaust fumes to seep into
the passenger compartment. In addition, have the exhaust
system inspected each time the vehicle is raised for lubri-
cation or oil change. Replace as required.CAUTION!
•The catalytic converter requires the use of unleaded
fuel only. Leaded gasoline will destroy the effective-
ness of the catalyst as an emissions control device
and may seriously reduce engine performance and
cause serious damage to the engine.
• Damage to the catalytic converter can result if your
vehicle is not kept in proper operating condition. In
the event of engine malfunction, particularly involv-
ing engine misfire or other apparent loss of perfor-
mance, have your vehicle serviced promptly. Contin-
ued operation of your vehicle with a severe
malfunction could cause the converter to overheat,
resulting in possible damage to the converter and
vehicle.
Under normal operating conditions, the catalytic converter
will not require maintenance. However, it is important to
keep the engine properly tuned to assure proper catalyst
operation and prevent possible catalyst damage.
NOTE: Intentional tampering with emissions control sys-
tems can result in civil penalties being assessed against
you.
476 SERVICING AND MAINTENANCE