2010 JEEP GRAND CHEROKEE TPMS

10. Oil Pressure Warning LightThis light indicates low engine oil pressure. The
light should turn on momentarily when the engine
is started. If the light turns on while driving, stop the
vehicle, and shut off the engine as soon as possible. A
continuous chime will sound when this light turns on.
Do not operate the vehicle until the cause is corrected.
This light does not indicate how much oil is in the engine.
The engine oil level must be checked under the hood.
11. Electronic Stability Program (ESP) Indicator
Light/Traction Control System (TCS) Indicator Light If this indicator light flashes during accelera-
tion, apply as little throttle as possible. While
driving, ease up on the accelerator. Adapt your
speed and driving to the prevailing road con-
ditions, and do not switch off the Electronic Stability
Program (ESP), or Traction Control System (TCS). 12. Tire Pressure Monitoring Telltale Light
Each tire, including the spare (if provided),
should be checked monthly, when cold and
inflated 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
determine the proper tire inflation pressure for those
tires.)
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
160 UNDERSTANDING YOUR INSTRUMENT PANEL

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 forapproximately 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.
4
UNDERSTANDING YOUR INSTRUMENT PANEL 161

CAUTION!
The TPMS has been optimized for the original
equipment tires and wheels. TPMS pressures and
warning have been established for the tire size
equipped on your vehicle. Undesirable system opera-
tion or sensor damage may result when using re-
placement equipment that is not of the same size,
type, and/or style. Aftermarket wheels can cause
sensor damage. Do not use tire sealant from a can, or
balance beads if your vehicle is equipped with a
TPMS, as damage to the sensors may result.
13. Temperature Gauge
The temperature gauge shows engine coolant tempera-
ture. Any reading within the normal range indicates that
the engine cooling system is operating satisfactorily. The gauge pointer will likely indicate a higher tempera-
ture when driving in hot weather, up mountain grades,
or when towing a trailer. It should not be allowed to
exceed the upper limits of the normal operating range.
CAUTION!
Driving with a hot engine cooling system could
damage your vehicle. If the temperature gauge reads
240°F (116°C) or greater, pull over and stop the
vehicle. Idle the vehicle with the air conditioner
turned off until the pointer drops back into the
normal range 200–230°F (93–110°C). If the pointer
remains on the 240°F (116°C) or greater, and you hear
continuous chimes, turn the engine off immediately,
and call an authorized dealership for service.
162 UNDERSTANDING YOUR INSTRUMENT PANEL

▫Replacement Tires .................... 277
 Tire Rotation Recommendations ........... 278
 Tire Pressure Monitor System (TPMS) ....... 279
▫ Premium System .................... 279
▫ General Information .................. 282
 Fuel Requirements ..................... 282
▫ 6.1L Engine ........................ 282
▫ Reformulated Gasoline ................ 283
▫ Gasoline/Oxygenate Blends ............. 283
▫ E85 Usage In Non-Flex Fuel Vehicles ...... 284
▫ MMT In Gasoline .................... 284
▫ Materials Added To Fuel ............... 285
▫ Fuel System Cautions ................. 285 ▫
Carbon Monoxide Warnings ............ 286
 Adding Fuel ......................... 287
▫ Fuel Filler Cap (Gas Cap) .............. 287
▫ Loose Fuel Filler Cap Message ........... 288
 Trailer Towing ........................ 289
▫ Common Towing Definitions ............ 289
▫ Trailer Hitch Classification .............. 292
▫ Trailer Towing Weights
(Maximum Trailer Weight Ratings) ........ 293
▫ Trailer And Trailer Tongue Weight ........ 293
▫ Towing Requirements ................. 295
▫ Towing Tips ........................ 298
 Recreational Towing
(Behind Motorhome, Etc.) ................ 299
5
STARTING AND OPERATING 237

TIRE PRESSURE MONITOR SYSTEM (TPMS)
Premium System
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.
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 Tire Pressure Monitor System (TPMS) consists of the
following components:
•Receiver Module
•4 Tire Pressure Monitoring Sensors
•3 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), and a graphic displaying tire pressures
•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. In addition, the
Electronic Vehicle Information Center (EVIC) will display
one or more Low Pressure messages (Left Front, Left
Rear, Right Front, Right Rear) for three seconds, and a
graphic display of the pressure value(s) with the low
tire(s) flashing. Refer to “Electronic Vehicle Information
Center (EVIC)” in “Understanding Your Instrument
Panel” for further information.
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STARTING AND OPERATING 279

If the ignition switch is cycled, this sequence will repeat,
providing the system fault still exists. If the system fault
no longer exists, the “Tire Pressure Monitoring Telltale
Light” will no longer flash, theCHECK TPM SYSTEM
text message will not be present, and a pressure value
will be displayed instead of dashes. A system fault can
occur by any of the following scenarios: 1. Jamming due to electronic devices or driving next to
facilities emitting the same Radio Frequencies as the TPM
sensors.
2. Installing some form of aftermarket window tinting
that affects radio wave signals.
3. Lots of snow or ice around the wheels or wheel
housings.
4. Using tire chains on the vehicle.
5. Using wheels/tires not equipped with TPM sensors.
In addition, the “Tire Pressure Monitoring Telltale Light”
will turn OFF and the graphic in the EVIC will display a
new pressure value instead of dashes (- -), 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 20 minutes above 15 mph (24 km/h)
in order for the TPMS to receive this information.
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STARTING AND OPERATING 281

Bulb Replacement...................... 349
Cargo .............................. 143
Center Mounted Stop ................... 354
Cruise .............................. 164
Daytime Running ...................... 103
Dimmer Switch, Headlight .............100,106
Electronic Stability Program (ESP)
Indicator ....................... 160,163,260
Electronic Throttle Control Warning ......... 165
Exterior .............................. 73
Fog .......................... 105,165,352
Fuses ............................... 341
Hazard Warning Flasher ................. 302
Headlight Switch ...................... 100
Headlights ........................ 349,350
Headlights On With Wipers ............... 101
High Beam Indicator .................... 157
Illuminated Entry ....................... 18
Instrument Cluster ..................... 100 Interior
............................. 107
Lights On Reminder .................... 104
Low Fuel ............................ 166
Malfunction Indicator (Check Engine) ........ 158
Map Reading ......................... 108
Oil Pressure .......................... 160
Passing ............................. 106
Reading .......................... 108,127
Rear Servicing ........................ 352
Rear Tail ............................ 352
Seat Belt Reminder ..................... 164
Security Alarm (Theft Alarm) .............. 159
Service ............................. 349
Service Engine Soon (Malfunction Indicator) . . . 158
Side Marker .......................... 352
SmartBeams .......................... 102
Tire Pressure Monitoring (TPMS) ........... 160
Traction Control .................... 160,260
Turn Signal ................ 73,100,106,351,352
396 INDEX

Tires ............................73,272,385
Air Pressure .......................... 274
General Information .................... 272
High Speed .......................... 275
Inflation Pressures ..................... 274
Life of Tires .......................... 277
Load Capacity ..................... 268,269
Pressure Monitor System (TPMS) ........... 279
Pressure Warning Light .................. 160
Quality Grading ....................... 385
Radial .............................. 275
Replacement ......................... 277
Rotation ............................ 278
Safety .............................. 262
Sizes ............................... 264
Spinning ............................ 276
Tread Wear Indicators ................... 276
Tongue Weight/Trailer Weight .............. 293
Tow Hooks, Emergency ................... 308 Towing
............................ 289,309
Behind a Motor Home .................. 299
Disabled Vehicle ....................... 309
Guide .............................. 293
Recreational .......................... 299
Weight .............................. 293
Towing Vehicle Behind a Motor Home ......... 299
Traction Control ......................... 255
Traction Control Light .................... 160
Trailer Sway Control (TSC) ................. 260
Trailer Towing .......................... 289
Cooling System Tips .................... 299
Hitches ............................. 292
Minimum Requirements ................. 295
Trailer and Tongue Weight ............... 293
Trailer Towing Guide ..................... 293
Trailer Weight .......................... 293
Transmission ........................... 335
Automatic ........................ 242,335
10
INDEX 403