2014 JEEP GRAND CHEROKEE fuel pressure

Periodic Safety Checks You Should Make Outside
The Vehicle
Tires
Examine tires for excessive tread wear and uneven wear
patterns. Check for stones, nails, glass, or other objects
lodged in the tread or sidewall. Inspect the tread for cuts
and cracks. Inspect sidewalls for cuts, cracks and bulges.
Check the wheel nuts for tightness. Check the tires
(including spare) for proper cold inflation pressure.
Lights
Have someone observe the operation of brake lights and
exterior lights while you work the controls. Check turn
signal and high beam indicator lights on the instrument
panel.
Door Latches
Check for positive closing, latching, and locking.
Fluid Leaks
Check area under vehicle after overnight parking for fuel,
engine coolant, oil, or other fluid leaks. Also, if gasoline
fumes are detected or if fuel, power steering fluid (if
equipped), or brake fluid leaks are suspected, the cause
should be located and corrected immediately.
116 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

WARNING!
Driving a vehicle with the red brake light on is
dangerous. Part of the brake system may have failed.
It will take longer to stop the vehicle. You could have
a collision. Have the vehicle checked immediately.
Vehicles equipped with the Anti-Lock Brake System
(ABS), are also equipped with Electronic Brake Force
Distribution (EBD). In the event of an EBD failure, the
Brake Warning Light will turn on along with the ABS
Light. Immediate repair to the ABS system is required.
Operation of the Brake Warning Light can be checked by
turning the ignition switch from the OFF position to the
ON/RUN position. The light should illuminate for ap-
proximately two seconds. The light should then turn off
unless the parking brake is applied or a brake fault is
detected. If the light does not illuminate, have the light
inspected by an authorized dealer.
The light also will turn on when the parking brake is
applied with the ignition switch in the ON/RUN position.
NOTE: This light shows only that the parking brake is
applied. It does not show the degree of brake application.
14. Fuel Gauge/Fuel Door Reminder
The fuel pump symbol points to the side of the vehicle
where the fuel door is located. The pointer shows the
level of fuel in the fuel tank when the ignition switch is in
the ON/RUN position.
15. Tire Pressure Monitoring Telltale Light
Each tire, including the spare (if provided),
should be checked monthly when cold and in-
flated to the inflation pressure recommended by
the vehicle manufacturer on the vehicle placard
or tire inflation pressure label. (If your vehicle has tires
of a different size than the size indicated on the vehicle
placard or tire inflation pressure label, you should deter-
mine the proper tire inflation pressure for those tires.)
4
UNDERSTANDING YOUR INSTRUMENT PANEL 301

As an added safety feature, your vehicle has been
equipped with a Tire Pressure Monitoring System
(TPMS) that illuminates a low tire pressure telltale when
one or more of your tires is significantly under-inflated.
Accordingly, when the low tire pressure telltale illumi-
nates, you should stop and check your tires as soon as
possible, and inflate them to the proper pressure. Driving
on a significantly under-inflated tire causes the tire to
overheat and can lead to tire failure. Under-inflation also
reduces fuel efficiency and tire tread life, and may affect
the vehicle’s handling and stopping ability.
Please note that the TPMS is not a substitute for proper
tire maintenance, and it is the driver ’s responsibility to
maintain correct tire pressure, even if under-inflation has
not reached the level to trigger illumination of the TPMS
low tire pressure telltale.Your vehicle has also been equipped with a TPMS
malfunction indicator to indicate when the system is not
operating properly. The TPMS malfunction indicator is
combined with the low tire pressure telltale. When the
system detects a malfunction, the telltale will flash for
approximately one minute and then remain continuously
illuminated. This sequence will continue upon subse-
quent vehicle start-ups as long as the malfunction exists.
When the malfunction indicator is illuminated, the sys-
tem may not be able to detect or signal low tire pressure
as intended. TPMS malfunctions may occur for a variety
of reasons, including the installation of replacement or
alternate tires or wheels on the vehicle that prevent the
TPMS from functioning properly. Always check the
TPMS malfunction telltale after replacing one or more
tires or wheels on your vehicle, to ensure that the
replacement or alternate tires and wheels allow the TPMS
to continue to function properly.
302 UNDERSTANDING YOUR INSTRUMENT PANEL

5. Press and release theDOWNarrow button to select
“Yes”, then press and release the Right arrow button to
select reset of the Oil Life.
6. Press and release the Uparrow button to exit the EVIC
screen.
NOTE: If the indicator message illuminates when you
start the vehicle, the oil change indicator system did not
reset. If necessary, repeat this procedure.
Electronic Vehicle Information Center (EVIC)
Messages
• Front Seatbelts Unbuckled
• Driver Seatbelt Unbuckled
• Passenger Seatbelt Unbuckled
• Service Airbag System
• Traction Control Off •
Washer Fluid Low
• Oil Pressure Low
• Oil Change Due
• Fuel Low
• Service Antilock Brake System
• Service Electronic Throttle Control
• Service Power Steering
• Cruise Off
• Cruise Ready
• Cruise Set To XXX MPH
• Tire Pressure Screen With Low Tire(s) “Inflate Tire to
XX”
• Service Tire Pressure System
4
UNDERSTANDING YOUR INSTRUMENT PANEL 311

DRIVING THROUGH WATER .............412
▫ Flowing/Rising Water ..................412
 POWER STEERING .....................414

FUEL SAVER TECHNOLOGY — IF EQUIPPED. . .415
 PARKING BRAKE ..................... .415
 ELECTRONIC BRAKE CONTROL SYSTEM . . . .418
▫ Anti-Lock Brake System (ABS) ............418
▫ Traction Control System (TCS) ............419
▫ Brake Assist System (BAS) ...............419
▫ Electronic Roll Mitigation (ERM) ..........420
▫ Electronic Stability Control (ESC) ..........421
▫ ESC Activation/Malfunction Indicator Light
And ESC OFF Indicator Light ............426
▫ Trailer Sway Control (TSC) ..............427
TIRE SAFETY INFORMATION .............428
▫ Tire Markings ....................... .428
▫ Tire Identification Number (TIN) ...........431
▫ Tire Terminology And Definitions ..........433
▫ Tire Loading And Tire Pressure ...........434
 TIRES — GENERAL INFORMATION ........438
▫ Tire Pressure ....................... .438
▫ Tire Inflation Pressures .................440
▫ Tire Pressures For High Speed Operation . . . .441
▫ Radial Ply Tires ..................... .441
▫ Tire Types .......................... .442
▫ Run Flat Tires — If Equipped .............443
▫ Spare Tires — If Equipped ...............444
388 STARTING AND OPERATING

▫Tire Spinning ....................... .447
▫ Tread Wear Indicators ..................447
▫ Life Of Tire ........................ .448
▫ Replacement Tires .....................448
 TIRE ROTATION RECOMMENDATIONS .....450

TIRE PRESSURE MONITOR SYSTEM (TPMS) . . .451
▫ Premium System — If Equipped ...........454
▫ Tire Pressure Monitoring Low Pressure
Warnings .......................... .455
▫ General Information ...................459
 FUEL REQUIREMENTS ..................459
▫ 6.4L Engine ......................... .459
▫ Reformulated Gasoline .................460 ▫
Gasoline/Oxygenate Blends ..............460
▫ E-85 Usage In Non-Flex Fuel Vehicles .......461
▫ MMT In Gasoline .....................461
▫ Materials Added To Fuel ................462
▫ Fuel System Cautions ...................462
▫ Carbon Monoxide Warnings .............463
 ADDING FUEL ....................... .464
▫ Emergency Fuel Filler Door Release .........466
 VEHICLE LOADING ....................467
▫ Certification Label ....................467
 TRAILER TOWING .....................470
▫ Common Towing Definitions .............470
▫ Trailer Hitch Classification ...............4735
STARTING AND OPERATING 389

WARNING!(Continued)
•Unequal tire pressures from one side of the vehicle
to the other can cause the vehicle to drift to the
right or left.
• Always drive with each tire inflated to the recom-
mended cold tire inflation pressure.
Economy
Improper inflation pressures can cause uneven wear
patterns to develop across the tire tread. These abnormal
wear patterns will reduce tread life resulting in a need for
earlier tire replacement. Under-inflation also increases
tire rolling resistance resulting in higher fuel consump-
tion.
Ride Comfort And Vehicle Stability
Proper tire inflation contributes to a comfortable ride.
Over-inflation produces a jarring and uncomfortable
ride. Both under-inflation and over-inflation affect the
stability of the vehicle and can produce a feeling of
sluggish response or over responsiveness in the steering.
NOTE:
• Unequal tire pressures from side to side may cause
erratic and unpredictable steering response.
• Unequal tire pressure from side to side may cause the
vehicle to drift left or right.
5
STARTING AND OPERATING 439

•Driving on a significantly under-inflated tire causes
the tire to overheat and can lead to tire failure.
Under-inflation also reduces fuel efficiency and tire
tread life, and may affect the vehicle’s handling and
stopping ability.
• The TPMS is not a substitute for proper tire mainte-
nance, and it is the driver ’s responsibility to maintain
correct tire pressure using an accurate tire gauge, even
if under-inflation has not reached the level to trigger
illumination of the Tire Pressure Monitoring Telltale
Light.
• Seasonal temperature changes will affect tire pressure,
and the TPMS will monitor the actual tire pressure in
the tire.Premium System — If Equipped
The Tire Pressure Monitor System (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.
Tire Pressure Monitor Display
454 STARTING AND OPERATING