2007 JEEP GRAND CHEROKEE TPMS

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. Accord-
ingly, when the low tire pressure telltale illuminates, you
should stop and check your tires as soon as possible, and
inflate them to the proper pressure. Driving on a signifi-
cantly under-inflated tire causes the tire to overheat andcan 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.
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.
UNDERSTANDING YOUR INSTRUMENT PANEL 175
4

NTire Identification Number (TIN)..........253
NTire Loading And Tire Pressure...........254
mTires Ð General Information...............258
NRun Flat Tires........................258
NTire Pressure.........................258
NTire Inflation Pressures.................260
NTire Pressures For High Speed Operation....261
NRadial-Ply Tires......................262
NTire Spinning........................263
NTread Wear Indicators..................263
NLife Of Tire.........................264
NReplacement Tires.....................265
NAlignment And Balance.................266mTire Rotation Recommendations............266
mTire Pressure Monitor System (TPMS)........266
NPremium System......................266
NGeneral Information...................270
mFuel Requirements......................270
NReformulated Gasoline.................271
NGasoline/Oxygenate Blends..............271
NMMT In Gasoline.....................272
NMaterials Added To Fuel................272
NFuel System Cautions..................273
NCarbon Monoxide Warnings..............273
mAdding Fuel..........................274
NFuel Filler Cap (Gas Cap)...............274
232 STARTING AND OPERATING

CAUTION!
Replacing original tires with tires of a different size
may result in false speedometer and odometer read-
ings.
Alignment and Balance
Poor suspension alignment may result in:
²Fast tire wear.
²Uneven tire wear, such as feathering and one-sided
wear.
²Vehicle pull to right or left.
Tires may also cause the vehicle to pull left or right.
Alignment will not correct this problem. See your autho-
rized dealer for proper diagnosis.Improper alignment will not cause vehicle vibration.
Vibration may be a result of tire and wheel out-of-
balance. Proper balancing will reduce vibration and
avoid tire cupping and spotty wear.
TIRE ROTATION RECOMMENDATIONS
Do not rotate the tires as the wider rear tires will not fit
on the front of the vehicle.
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. The wheel sensors
monitor tire pressure, and status for all four active road
tires.
266 STARTING AND OPERATING

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 ªTire Pressure Monitoring Telltale Lightº will
illuminate in the instrument cluster, and an au-
dible chime will be activated when one or more
tire pressures is low. The ªTire Pressure Monitoring
Telltale Lightº will flash on and off for 60 seconds when
a system fault is detected. The flash cycle will repeat
every ten minutes or until the fault condition is removed
and reset.
The Tire Pressure Monitoring System (TPMS) consists of
the following components:
²Receiver Module
²4 Wheel Sensors
²3 Wheel Sensor Trigger Modules
²Tire Pressure Monitoring System Display Messages in
the EVIC
²Tire Pressure Monitoring Telltale Light
The system consists of tire pressure monitoring sensors
attached to each wheel through the valve stem mounting
hole, a central receiver module, Wheel Sensor Trigger
Modules mounted in three of the four wheel wells,
various Tire Pressure Monitoring System Display Mes-
sages in the EVIC, and a ªTire Pressure Monitoring
Telltale Light.º
NOTE:For vehicles with optional wheel/tire sizes and
significantly different tire placard pressures, the placard
pressure value and the low-pressure threshold value is
re-programmable at your authorized dealer to accommo-
date the customer selected wheel/tire combinations rec-
ommended by DaimlerChrysler Corporation.
STARTING AND OPERATING 267
5

The following9warnings9will cause a text message to be
displayed, an audible chime to sound, and the ªTire
Pressure Monitoring Telltale Lightº to illuminate. The
audible chime will occur once every ignition cycle for
each9warning9detected. The ªTire Pressure Monitoring
Telltale Lightº will illuminate continuously (solid) and
shall remain illuminated until the warning condition is
removed/reset.
When the appropriate conditions exist, the Electronic
Vehicle Information Center (EVIC) displays the following
messages.LEFT FRONT, LEFT REAR, RIGHT FRONT,
RIGHT REAR LOW PRESSURE
One or more of these messages will be displayed in the
EVIC if a low tire pressure condition exists in one or more
tires.
Inspect all tires for proper inflation pressure, once the
proper tire pressure has been set, the TPMS will reset
automatically when the vehicle has been driven for at
least 2 minutes at or above 15 mph (24 km/h).
CHECK TPM SYSTEM
See your authorized dealer when this message appears in
the EVIC. This message indicates that a system fault
condition has been detected.
268 STARTING AND OPERATING

CAUTION!
The TPMS has been optimized for the original
equipment tires and wheels. TPMS pressures have
been established for the tire size equipped on your
vehicle. Undesirable system operation or sensor
damage may result when using replacement equip-
ment that is not of the same size, type, and/or style.
After-market 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.
CAUTION!
After inspecting or adjusting the tire pressure al-
ways reinstall the valve stem cap. This will prevent
moisture and dirt from entering the valve stem,
which could damage the wheel rim sensor.
NOTE:
²The TPMS can inform the driver of a low tire pressure
condition.
²The TPMS is not intended to replace normal tire care
and maintenance, nor to provide warning of a tire
failure or condition.
²The TPMS should not be used as a tire pressure gauge
while adjusting your tire pressure.
STARTING AND OPERATING 269
5

LowTire ............................ 175
Malfunction Indicator (Check Engine)........ 172
Map Reading......................... 120
Oil Pressure.......................... 174
Passing............................. 119
Reading..........................120,145
Rear Servicing........................ 344
Rear Tail............................ 344
Seat Belt Reminder..................... 177
Security Alarm (Theft Alarm).............. 174
Service.............................. 341
Service Engine Soon (Malfunction Indicator) . . . 172
Side Marker.......................... 344
SmartBeams.......................... 116
Tire Pressure Monitoring (TPMS)........... 175
Traction Control....................136,174
Turn Signal.................. 114,118,342,344
Vanity Mirror.......................... 77
Voltage............................. 178Load Floor, Cargo....................... 163
Loading Vehicle
Tires ............................... 254
Locks................................. 26
Automatic Door........................ 27
Child Protection........................ 28
Door................................ 26
Power Door........................... 26
Lower Anchors and Tether for CHildren
(LATCH)............................58,60
Lubrication, Body....................... 316
Lumbar Support........................ 102
Maintenance Free Battery.................. 312
Maintenance Procedures................... 305
Maintenance Schedule.................... 350
Schedule ªAº......................... 363
Schedule ªBº......................... 353
Maintenance Schedules.................... 350
386 INDEX

General Information.................... 258
High Speed.......................... 261
Inflation Pressures..................... 260
Life of Tires.......................... 264
Load Capacity.....................254,255
Pressure Monitor System (TPMS)........... 266
Pressure Warning Light.................. 175
Quality Grading....................... 375
Radial.............................. 262
Replacement......................... 265
Rotation............................. 266
Safety............................67,250
Sizes............................... 251
Spinning............................ 263
Tread Wear Indicators................... 263
Tongue Weight/Trailer Weight.............. 282
Towing............................... 277
Behind a Motor Home.................. 289
Guide.............................. 282Recreational.......................... 289
Weight.............................. 282
Towing Vehicle Behind a Motor Home......... 289
Traction Control......................... 132
Traction Control Light.................... 174
Trailer Towing.......................... 277
Cooling System Tips.................... 289
Hitches............................. 281
Minimum Requirements................. 284
Trailer and Tongue Weight................ 282
Wiring.............................. 287
Trailer Towing Guide..................... 282
Trailer Weight.......................... 282
Transmission........................... 327
Automatic........................239,327
Range Indicator....................... 177
Shifting............................. 238
Transmitter Battery Service (Remote Keyless Entry) . 23
Transmitter, Garage Door Opener (HomeLinkt) . . 145
392 INDEX