2018 JEEP PATRIOT warning light

5. Once you repair or replace the original road
tire and reinstall it on the vehicle in place of
the compact spare tire, the TPMS will update
automatically and the Tire Pressure Monitor-
ing Telltale Light will turn OFF, as long as no
tire pressure is below the low-pressure
warning limit in any of the four active road
tires. The vehicle may need to be driven for
up to 10 minutes above 15 mph (24 km/h) in
order for the TPMS to receive this informa-
tion.
Premium System — If EquippedThe TPMS uses wireless technology with wheel
rim mounted electronic sensors to monitor tire
pressure levels. Sensors, mounted to each
wheel as part of the valve stem, transmit tire
pressure readings to the receiver module.
NOTE:
It is particularly important for you to check
the tire pressure in all of your tires regularly
and to maintain the proper pressure.
The TPMS consists of the following compo-
nents:•Receiver Module
•Four Tire Pressure Monitoring Sensors
•Three Trigger Modules (mounted in three of
the four wheel wells)
•Various Tire Pressure Monitoring System
Messages, which display in the Electronic
Vehicle Information Center (EVIC)
•Tire Pressure Monitoring Telltale Light
Tire Pressure Monitoring Low Pressure
Warnings
The Tire Pressure Monitoring Telltale Light will
illuminate in the instrument cluster and an au-
dible chime will be activated when one or more
of the four active road tire pressures are low.
The audible chime will sound once every igni-
tion cycle for the first condition that it detects. In
addition, the EVIC will display a “LOW TIRE”
text message for a minimum of five seconds
and a graphic of the pressure value(s) with the
low tire(s) flashing.Should a low tire condition occur on any of the
four active road tire(s), you should stop as soon
as possible and inflate all tires that are flashing
on the graphic display to the vehicle’s recom-
mended cold placard pressure value. The sys-
tem will automatically update, the “LOW TIRE”
text message will no longer be displayed, the
graphic display of the pressure value(s) will stop
flashing, and the Tire Pressure Monitoring Light
will extinguish once the updated tire pressure(s)
have been received.
Tire Pressure Monitoring Display
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1. The compact spare tire does not have a tire
pressure monitoring sensor. Therefore, the
TPMS will not monitor the tire pressure in the
compact spare tire.
2. If you install the compact spare tire in place
of a road tire that has a pressure below the
low-pressure warning limit, upon the next
ignition key cycle, a chime will sound and the
Tire Pressure Monitoring Telltale Light will
still turn ON due to the low tire. The “LOW
TIRE” text message and the graphic with the
low tire pressure flashing will be displayed.
3. However, after driving the vehicle for up to
10 minutes above 15 mph (24 km/h), the Tire
Pressure Monitoring Telltale Light will flash
on and off for 75 seconds and then remain
on solid. In addition, the EVIC will display a
“SERVICE TPM SYSTEM” message for a
minimum of five seconds and then display
dashes (- -) in place of the pressure values.
4. For each subsequent ignition key cycle, a
chime will sound and the Tire Pressure
Monitoring Telltale Light will flash on and offfor 75 seconds and then remain on solid,
and the EVIC will display a “SERVICE TPM
SYSTEM” message for a minimum of five
seconds and then display dashes (- -) in
place of the pressure values.
5.
Once you repair or replace the original road
tire and reinstall it on the vehicle in place of the
compact spare tire, the TPMS will update
automatically and the Tire Pressure Monitoring
Telltale Light will turn OFF, as long as no tire
pressure is below the low-pressure warning
limit in any of the four active road tires. The
vehicle may need to be driven for up to 10
minutes above 15 mph (24 km/h) in order for
the TPMS to receive this information.
TPMS Deactivation — If EquippedThe TPMS can be deactivated if replacing all
four wheel and tire assemblies (road tires) with
wheel and tire assemblies that do not have
TPMS Sensors, such as when installing Winter
wheel and tire assemblies on your vehicle. To
deactivate the TPMS, first, replace all four
wheel and tire assemblies (road tires) with tires
not equipped with Tire Pressure Monitoring(TPM) Sensors. Then, drive the vehicle for 10
minutes above 15 mph (24 km/h). The TPMS
will chime, the “TPM Telltale Light” will flash on
and off for 75 seconds and then remain on and
the Electronic Vehicle Information Center
(EVIC) will display the “SERVICE TPM SYS-
TEM” message and then display dashes (--) in
place of the pressure values. Beginning with the
next ignition switch cycle, the TPMS will no
longer chime or flash the TPM telltale and
display the “SERVICE TPM SYSTEM” message
in the EVIC but dashes (--) will remain in place
of the pressure values.
To reactivate the TPMS, replace all four wheel
and tire assemblies (road tires) with tires
equipped with TPM sensors. Then, drive the
vehicle for up to 10 minutes above 15 mph
(24 km/h). The TPMS will chime, the “TPM
Telltale Light” will flash on and off for 75 sec-
onds and then turn off, and the Electronic
Vehicle Information Center (EVIC) will display
the “SERVICE TPM SYSTEM” message. The
EVIC will also display pressure values in place
of the dashes. On the next ignition switch cycle
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WARNING!(Continued)
•Guard against carbon monoxide with
proper maintenance. Have the exhaust
system inspected every time the vehicle is
raised. Have any abnormal conditions re-
paired promptly. Until repaired, drive with
all side windows fully open.
•Keep the liftgate closed when driving your
vehicle to prevent carbon monoxide and
other poisonous exhaust gases from en-
tering the vehicle.
ADDING FUEL
Locking Fuel Filler Cap (Gas Cap)The locking gas cap is inside the fuel filler door,
on the left side of the vehicle. If the gas cap is
lost or damaged, be sure the replacement cap
is for use with this vehicle.
1. Turn off the engine.2. Insert the ignition key into the fuel cap and
turn the key one-quarter turn to the right,
then rotate the fuel cap to the left to remove.
3. After removing the gas cap, place the gas
cap tether cable over a hook on the inside of
the fuel door. This keeps the gas cap sus-
pended away from and protects the vehicle’s
surface.
4. Rotate the ignition key back to the left to
remove the key from the cap.
5. To replace the cap, insert it into the filler neck
and tighten to the right until at least one click
is heard.NOTE:
•When the fuel nozzle “clicks” or shuts off,
the fuel tank is full.
•Tighten the gas cap about 1/4 turn until
you hear one click. This is an indication
that cap is properly tightened.
•If the gas cap is not tightened properly,
the MIL will come on. Be sure the gas cap
is tightened every time the vehicle is
refueled.
Loose Fuel Filler Cap MessageIf the vehicle diagnostic system determines that
the fuel filler cap is loose or improperly installed,
a “gASCAP” message will be displayed in the
Odometer/Trip Odometer in the instrument clus-
ter. Refer to “Warning And Indicator Lights” in
“Understanding Your Instrument Panel” for fur-
ther information. Tighten the fuel filler cap prop-
erly and push the odometer/trip odometer RE-
SET button to turn the message off. If the
problem continues, the message will appear the
next time the vehicle is started. Refer to “On-
board Diagnostic System” in “Maintaining Your
Vehicle” for further information.
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Towing Requirements — Trailer Brakes
–Donotinterconnect the hydraulic brake sys-
tem or vacuum system of your vehicle with
that of the trailer. This could cause inad-
equate braking and possible personal injury.
– When towing a trailer equipped with a hy-
draulic surge actuated brake system, an
electronic brake controller is not required.
– Trailer brakes are recommended for trailers
over 1,000 lbs (453 kg) and required for
trailers in excess of 1,653 lbs (749 kg).
CAUTION!
If the trailer weighs more than 1,000 lbs
(453 kg) loaded, it should have its own
brakes and they should be of adequate
capacity. Failure to do this could lead to
accelerated brake lining wear, higher brake
pedal effort, and longer stopping distances.
WARNING!
•Do not connect trailer brakes to your vehi-
cle’s hydraulic brake lines. It can overload
your brake system and cause it to fail. You
might not have brakes when you need
them and could have an accident.
•Towing any trailer will increase your stop-
ping distance. When towing, you should
allow for additional space between your
vehicle and the vehicle in front of you.
Failure to do so could result in an accident.
Towing Requirements – Trailer Lights And
Wiring
Whenever you pull a trailer, regardless of the
trailer size, stop lights and turn signals on the
trailer are required for motoring safety.The Trailer Tow Package may includea7ora
13–pin wiring harness. Use a factory approved
trailer harness and connector.
NOTE:
Do not cut or splice wiring into the vehicles
wiring harness.
The electrical connections are all complete to
the vehicle but you must mate the harness to a
trailer connector.
7-Pin Connector
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Do not raise the vehicle until you are sure the
jack is securely engaged.
3. Turn the jack screw to the left until the jack
can be placed under the jacking location.
Once the jack is positioned, turn the jack
screw to the right until the jack head is
properly engaged with the lift area closest to
the wheel to be changed.
WARNING!
Raising the vehicle higher than necessary
can make the vehicle less stable. It could slip
off the jack and hurt someone near it. Raise
the vehicle only enough to remove the tire.
4. Using the swivel wrench raise the vehicle by
turning the jack screw to the right. Raise the
vehicle only until the tire just clears the
surface and enough clearance is obtained to
install the spare tire. Minimum tire lift pro-
vides maximum stability.
5. Remove the wheel nuts and pull the wheel
and wheel covers, where applicable, off the
hub. Install the spare wheel and wheel nuts
with the cone shaped end of the nuts toward
the wheel. Lightly tighten the nuts.
WARNING!
To avoid the risk of forcing the vehicle off the
jack, do not tighten the wheel nuts fully until
(Continued)
WARNING!(Continued)
the vehicle has been lowered. Failure to follow
this warning may result in serious injury.
CAUTION!
Be sure to mount the spare tire with the valve
stem facing outward. The vehicle could be
damaged if the spare tire is mounted incor-
rectly.
Rear Jacking Location
Mounting Spare Tire
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3. Install the five wheel lug nuts with the cone
shaped end of the nut toward the wheel.
Lightly tighten the lug nuts.
WARNING!
To avoid the risk of forcing the vehicle off the
jack, do not tighten the lug nuts fully until the
(Continued)
WARNING!(Continued)
vehicle has been lowered. Failure to follow
this warning may result in serious injury.
4. Lower the vehicle to the ground by turning
the jack handle counterclockwise.
5. Finish tightening the lug nuts. Push down on
the wrench while at the end of the handle for
increased leverage. Refer to “Torque Speci-
fications” in this section for correct lug nut
torque.
6. After 25 miles (40 km) check the lug nut
torque with a torque wrench to ensure that
all lug nuts are properly seated against the
wheel.
Vehicles Without Wheel Covers
1. Mount the road tire on the axle.
2. Install the remaining lug nuts with the cone
shaped end of the nut toward the wheel.
Lightly tighten the lug nuts.
WARNING!
To avoid the risk of forcing the vehicle off the
jack, do not fully tighten the lug nuts until the
vehicle has been lowered. Failure to follow
this warning may result in serious injury.
3. Lower the vehicle to the ground by turning
the jack handle counterclockwise.
4. Finish tightening the lug nuts. Push down on
the wrench while at the end of the handle for
increased leverage. Refer to “Torque Speci-
fications” in this section for correct lug nut
torque.
5. After 25 miles (40 km) check the lug nut
torque with a torque wrench to ensure that
all lug nuts are properly seated against the
wheel.
Tire And Wheel Cover Or Center Cap
1 — Valve Stem 4 — Wheel Cover
2 — Valve Notch 5 — Road Wheel
3 — Wheel Lug Nut
234

ONBOARD DIAGNOSTIC
SYSTEM — OBD II
Your vehicle is equipped with a sophisticated
onboard diagnostic system called OBD II. This
system monitors the performance of the emis-
sions, engine, and automatic transmission con-
trol systems. When these systems are operat-
ing properly, your vehicle will provide excellent
performance and fuel economy, as well as
engine emissions well within current govern-
ment regulations.
If any of these systems require service, the
OBD II system will turn on the “Malfunction
Indicator Light” (MIL). It will also store diagnos-
tic codes and other information to assist your
service technician in making repairs. Although
your vehicle will usually be drivable and not
need towing, see your authorized dealer for
service as soon as possible.
CAUTION!
•Prolonged driving with the MIL on could
cause further damage to the emission con-
trol system. It could also affect fuel
economy and driveability. The vehicle
must be serviced before any emissions
tests can be performed.
•If the MIL is flashing while the engine is
running, severe catalytic converter dam-
age and power loss will soon occur. Imme-
diate service is required.
Onboard Diagnostic System (OBD II)
Cybersecurity
Your vehicle is required to have an Onboard
Diagnostic system (OBD II) and a connection
port to allow access to information related to the
performance of your emissions controls. Autho-
rized service technicians may need to access
this information to assist with the diagnosis and
service of your vehicle and emissions system.
WARNING!
•ONLY an authorized service technician
should connect equipment to the OBD II
connection port in order to diagnose or
service your vehicle.
•If unauthorized equipment is connected to
the OBD II connection port, such as a
driver-behavior tracking device, it may:
•Be possible that vehicle systems, in-
cluding safety related systems, could be
impaired or a loss of vehicle control
could occur that may result in an acci-
dent involving serious injury or death.
•Access, or allow others to access, infor-
mation stored in your vehicle systems,
including personal information.
For further information, refer to “Cybersecurity”
in the “Understanding Your Instrument Panel”
section.
255

•If frequent engine coolant (antifreeze) addi-
tions are required, the cooling system should
be pressure tested for leaks.
•Maintain engine coolant (antifreeze) concen-
tration at a minimum of 50% OAT coolant
(conforming to MS.90032) and distilled water
for proper corrosion protection of your engine
which contains aluminum components.
•Make sure that the coolant expansion bottle
overflow hoses are not kinked or obstructed.
•Keep the front of the radiator clean. If your
vehicle is equipped with air conditioning,
keep the front of the condenser clean.
•Do not change the thermostat for Summer or
Winter operation. If replacement is ever nec-
essary, install ONLY the correct type thermo-
stat. Other designs may result in unsatisfac-
tory engine coolant (antifreeze) performance,
poor gas mileage, and increased emissions.
Brake SystemIn order to assure brake system performance,
all brake system components should be in-spected periodically. Refer to the “Maintenance
Schedule” for the proper maintenance intervals.
WARNING!
Riding the brakes can lead to brake failure
and possibly a collision. Driving with your
foot resting or riding on the brake pedal can
result in abnormally high brake tempera-
tures, excessive lining wear, and possible
brake damage. You would not have your full
braking capacity in an emergency.
Brake Master Cylinder
The fluid level in the master cylinder should be
checked when performing under hood services,
or immediately if the brake system warning light
is on.
Be sure to clean the top of the master cylinder
area before removing the cap. If necessary, add
fluid to bring the fluid level up to the require-
ments described on the brake fluid reservoir.
Fluid level can be expected to fall as the brake
pads wear. The brake fluid level should be
checked when the pads are replaced. However,low fluid level may be caused by a leak and a
checkup may be needed.
NOTE:
If your vehicle is equipped with a manual
transmission, the brake fluid reservoir sup-
plies fluid to both the brake system and the
clutch release system. The two systems are
separated in the reservoir, and a leak in one
system will not affect the other system. The
manual transmission clutch release system
should not require fluid replacement during
the life of the vehicle. If the brake fluid
reservoir is low and the brake system does
not indicate any leaks or other problems, it
may be a result of a leak in the hydraulic
clutch release system. See your local autho-
rized dealer for service.
Use only manufacturer’s recommended brake
fluid. Refer to “Fluids, Lubricants, And Genuine
Parts” in “Maintaining Your Vehicle” for further
information.
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