2006 JEEP GRAND CHEROKEE service indicator

Life of Tire
The service life of a tire is dependent upon varying
factors including but not limited to:
•Driving style
•Tire pressure
•Distance driven
WARNING!
Tires and spare tire should be replaced after six
years, regardless of the remaining tread. Failure to
follow this warning can result in sudden tire failure.
You could lose control and have an accident result-
ing in serious injury or death.
Keep unmounted tires in a cool, dry place with as little
exposure to light as possible. Protect tires from contact
with oil, grease and gasoline.
Replacement Tires
The tires on your new vehicle provide a balance of many
characteristics. They should be inspected regularly for
wear and correct cold tire inflation pressure. The manu-
facturer strongly recommends that you use tires equiva-
lent to the originals in size, quality and performance
when replacement is needed (see the paragraph on tread
wear indicators). Refer to the Tire and Loading Informa-
tion placard for the size designation of your tire. The
service description and load identification will be found
on the original equipment tire. Failure to use equivalent
replacement tires may adversely affect the safety, han-
dling, and ride of your vehicle. We recommend that you
contact your original equipment or an authorized tire
dealer with any questions you may have on tire specifi-
cations or capability.
292 STARTING AND OPERATING

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 emissions, engine, and automatic
transmission control systems. When these systems are
operating properly, your vehicle will provide excellent
performance and fuel economy, as well as engine emis-
sions well within current government regulations.
If any of these systems require service, the OBD II system
will turn on the“Malfunction Indicator Light.”It will
also store diagnostic codes and other information to
assist your service technician in making repairs. Al-
though your vehicle will usually be drivable and not
need towing, see your dealer for service as soon as
possible.CAUTION!
•Prolonged driving with the“Malfunction Indica-
tor Light”on could cause further damage to the
emission control system. It could also affect fuel
economy and driveability. The vehicle must be
serviced before any emissions tests can be per-
formed.
•If the“Malfunction Indicator Light”is flashing
while the engine is running, severe catalytic con-
verter damage and power loss will soon occur.
Immediate service is required.
Loose Fuel Filler Cap Message
After fuel is added, the vehicle diagnostic system can
determine if the fuel filler cap is loose, improperly
installed, or damaged. A loose fuel filler cap message will
be displayed in the instrument cluster. Tighten the gas
MAINTAINING YOUR VEHICLE 347
7

cap until aclickingsound is heard. This is an indication
that the gas cap is properly tightened. Press the odometer
reset button to turn the message off. If the problem
persists, the message will appear the next time the
vehicle is started. This might indicate a damaged cap. If
the problem is detected twice in a row, the system will
turn on the Malfunction Indicator Light (MIL). Resolving
the problem will turn the MIL light off.
EMISSIONS INSPECTION AND MAINTENANCE
PROGRAMS
In some localities, it may be a legal requirement to pass
an inspection of your vehicle’s emissions control system.
Failure to pass could prevent vehicle registration.
For states which have an I/M (Inspection and
Maintenance) requirement, this check verifies the
following: the MIL (Malfunction Indicator Lamp)is functioning and is not on when the engine is running,
and that the OBD (On Board Diagnostic) system is ready
for testing.
Normally, the OBD system will be ready. The OBD
system maynotbe ready if your vehicle was recently
serviced, if you recently had a dead battery, or a battery
replacement. If the OBD system should be determined
not ready for the I/M test, your vehicle may fail the test.
Your vehicle has a simple ignition key actuated test
which you can use prior to going to the test station. To
check if your vehicle’s OBD system is ready, you must do
the following:
1. Insert your ignition key into the ignition switch.
2. Turn the ignition to the ON position, but do not crank
or start the engine.
3. If you crank or start the engine, you will have to start
this test over.
348 MAINTAINING YOUR VEHICLE

To determine the battery charge, check the battery test
indicator (if equipped) on top of the battery. Refer to the
illustration.
CAUTION!
It is essential when replacing the cables on the
battery that the positive cable is attached to the
positive post and the negative cable is attached to the
negative post. Battery posts are marked (+) positive
and negative (-) and identified on the battery case.
Also, if a“fast charger”is used while battery is in the
vehicle, disconnect both vehicle battery cables be-
fore connecting the charger to battery. Do not use a
“fast charger”to provide starting voltage.
Air Conditioner Maintenance
For best possible performance, your air conditioner
should be checked and serviced by an Authorized Dealer
at the start of each warm season. This service should
include cleaning of the condenser fins and a performance
test. Drive belt condition should also be checked at this
time.
MAINTAINING YOUR VEHICLE 359
7

Cargo .............................. 165
Center Mounted Stop................... 391
Cruise.............................. 185
Daytime Running...................... 125
Dimmer Switch, Headlight.............121,126
Electronic Stability Program (ESP)
Indicator.......................140,182,185
Electronic Throttle Control Warning......... 186
Fog ..........................125,186,389
Four-Wheel Drive Indicator............... 185
Fuses............................... 380
Hazard Warning Flasher................. 328
Headlight Switch...................... 122
Headlights........................... 387
Headlights On With Wipers............... 123
High Beam Indicator.................... 180
Illuminated Entry....................... 16
Instrument Cluster..................122,124
Interior..........................120,124Lights On Reminder.................... 125
Low Fuel............................ 187
LowTire ............................ 183
Malfunction Indicator (Check Engine)........ 180
Map Reading......................... 120
Oil Pressure.......................... 182
Passing............................. 126
Reading..........................120,152
Rear Servicing........................ 390
Rear Tail............................ 390
Seat Belt Reminder..................... 185
Security Alarm (Theft Alarm).............. 182
Service.............................. 387
Service Engine Soon (Malfunction Indicator) . . . 180
Side Marker.......................... 390
SmartBeams.......................... 123
Tire Pressure Monitoring (TPMS)........... 183
Tow/Haul Indicator.................... 184
Traction Control....................140,182
432 INDEX

Turn Signal..................121,126,388,390
Vanity Mirror.......................... 82
Voltage............................. 187
Load Floor, Cargo....................... 169
Loading Vehicle
Tires ............................... 283
Locks................................. 16
Automatic Door........................ 19
Child Protection........................ 17
Door................................ 16
Liftgate, Tailgate........................ 16
Power Door........................... 19
Lower Anchors and Tether for CHildren
(LATCH)............................62,64
Lubrication, Body....................... 362
Luggage Rack (Roof Rack)................. 171
Lumbar Support........................ 108
Maintenance Free Battery.................. 358Maintenance Procedures................... 350
Maintenance Schedule.................... 396
Schedule“A”......................... 409
Schedule“B”......................... 399
Maintenance Schedules.................... 396
Malfunction Indicator Light (Check Engine) . . 180,348
Manual, Service......................... 420
Master Cylinder (Brakes).................. 370
Memory Feature (Memory Seat)............. 114
Memory Seat........................... 114
Memory Seats and Radio.................. 114
Mini-Trip Computer...................... 197
Mirrors................................ 78
Automatic Dimming..................... 79
Electric Powered....................... 81
Electric Remote........................ 81
Exterior Folding........................ 80
Heated.............................. 80
Outside.............................. 80
INDEX 433
10

Adjustable Upper Shoulder Anchorage........ 36
And Pregnant Women................... 40
Child Restraint.......................58,66
Extender............................. 40
Front Seat............................ 32
Inspection............................ 70
Maintenance........................70,380
Pretensioners.......................... 38
Reminder............................ 185
Shoulder Belt Anchorage.................. 36
Seats................................. 106
Adjustment.......................... 106
Cleaning............................ 378
Easy Entry........................... 117
Head Restraints....................... 108
Heated.............................. 110
Lumbar Support....................... 108
Memory............................. 114
Power...........................109,110Rear Folding.......................... 111
Reclining............................ 107
Security Against Theft..................... 16
Security Alarm (Theft Alarm).............24,182
Selection of Oil......................... 352
Sentry Key (Immobilizer)................... 13
Sentry Key Programming................... 15
Sentry Key Replacement................... 14
Service Assistance....................... 416
Service Contract......................... 418
Service Engine Soon Light (Malfunction Indicator) . 180
Service Manuals........................ 420
Setting the Clock..................204,218,225
Shifting
Automatic Transmission................. 254
Shoulder Belts........................... 32
Signals, Turn...................126,180,388,390
SmartBeams........................... 123
Snow Chains (Tire Chains)................. 300
INDEX 437
10

Cooling System Tips.................... 320
Hitches............................. 311
Minimum Requirements................. 314
Trailer and Tongue Weight................ 313
Wiring.............................. 317
Trailer Towing Guide..................... 312
Trailer Weight.......................... 312
Transfer Case........................... 374
Maintenance.......................... 374
Transmission
Automatic........................254,371
Maintenance.......................... 371
Range Indicator....................... 186
Shifting............................. 254
Transmitter Battery Service (Remote Keyless Entry) . 23
Transmitter, Garage Door Opener (HomeLink) . . 152
Transmitter, Remote Keyless Entry (RKE)........ 20
Tread Wear Indicators.................... 291
Turn Signals...................126,180,388,390Underhood Fuses.....................382,384
Uniform Tire Quality Grades................ 421
Universal Transmitter..................... 152
Upholstery Care........................ 378
Vacuum/Vapor Harnesses................. 369
Vanity Mirrors........................... 82
Variance, Compass....................... 200
Vehicle Identification Number (VIN)............ 7
Vehicle Loading......................... 284
Vehicle Modifications/Alterations.............. 8
Vehicle Storage.......................245,385
Video Entertainment System
(Rear Seat Video System).................. 225
Viscosity, Engine Oil...................... 353
Warning Flasher, Hazard.................. 328
Warnings and Cautions..................... 7
Warranty Information..................... 419
440 INDEX