2008 JEEP LIBERTY service indicator

ONBOARD DIAGNOSTIC SYSTEM Ð 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 ªMalfunction Indicator Light.º 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!
²Prolonged driving with the ªMalfunction Indica-
tor Lightº 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.
²If the ªMalfunction Indicator Lightº is flashing
while the engine is running, severe catalytic con-
verter damage and power loss will soon occur.
Immediate service is required.
MAINTAINING YOUR VEHICLE 399
7

Loose Fuel Filler Cap Message
If the vehicle diagnostic system determines that the fuel
filler cap in loose, improperly installed, or damaged, a
ªgASCAPº message will display in the instrument clus-
ter. Tighten the gas cap until a ªclickingº sound is heard.
This is an indication that the gas cap is properly tight-
ened. Press the trip odometer reset button to turn off the
message. 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 Light)
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.
400 MAINTAINING YOUR VEHICLE

EMISSION CONTROL SYSTEM MAINTENANCE
The ªScheduledº maintenance services, listed inbold
typemust be done at the times or mileages specified to
assure the continued proper functioning of the emission
control system. These, and all other maintenance services
included in this manual, should be done to provide best
vehicle performance and reliability. More frequent main-
tenance may be needed for vehicles in severe operating
conditions such as dusty areas and very short trip
driving.
Inspection and service also should be done any time a
malfunction is suspected.
NOTE:Maintenance, replacement, or repair of the emis-
sion control devices and systems on your vehicle may be
performed by any automotive repair establishment or
individual using any automotive part, which has been
certified pursuant to U.S. EPA or, in the State of Califor-
nia, California Air Resources Board regulations.
MAINTENANCE SCHEDULE
The oil change indicator system will remind you that it is
time to take your vehicle in for scheduled maintenance.
On Electronic Vehicle Information Center (EVIC)
equipped vehicles, ªOil Change Requiredº will be dis-
played in the EVIC and a single chime will sound,
indicating that an oil change is necessary.
On Non-EVIC equipped vehicles, ªChange Oilº will flash
in the instrument cluster odometer and a single chime
will sound, indicating that an oil change is necessary.
Based on engine operation conditions the oil change
indicator message will illuminate, this means that service
is required for your vehicle. Have your vehicle serviced
as soon as possible, within the next 500 miles (805 km).
452 MAINTENANCE SCHEDULES
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Chart, Tire Sizing........................ 330
Check Engine Light (Malfunction Indicator
Light)................................ 400
Checking Your Vehicle For Safety............. 79
Checks, Safety........................... 79
Child Restraint....................69,70,74,76
Child Restraint Tether Anchors.............73,74
Child Safety Locks........................ 33
Clean Air Gasoline....................... 356
Cleaning
Windshield Wiper Blades................. 413
Climate Control......................... 260
Clock...........................224,239,243
Clutch Fluid Reservoir.................... 424
Clutch Interlocking Ignition System........... 288
Coin Holder........................... 173
Cold Weather Operation................... 278
Command-Trac Operation.................. 292
Compact Disc (CD) Maintenance............. 259Compass.............................. 212
Compass Calibration..................204,212
Compass Variance....................204,213
Computer, Trip/Travel.................... 210
Console.............................. 173
Console, Floor.......................... 173
Contract, Service........................ 462
Converter, Catalytic...................... 407
Coolant Pressure Cap (Radiator Cap).......... 418
Cooling System......................... 416
Adding Coolant (Antifreeze).............. 418
Coolant Capacity...................... 447
Coolant Level......................416,419
Disposal of Used Coolant................ 419
Drain, Flush, and Refill.................. 417
Inspection........................... 419
Points to Remember.................... 420
Pressure Cap......................... 418
Selection of Coolant (Antifreeze)......417,447,448
INDEX 473
10

Exterior.............................. 82
Fog ..........................136,194,445
Four-Wheel Drive Indicator....196,197,200,295,301
Headlight Switch...................... 133
Headlights........................133,443
Headlights On Reminder................. 135
Headlights On With Wipers............134,143
High Beam........................137,193
High Beam Indicator.................... 193
High Beam/Low Beam Select............. 137
Hill Descent Control Indicator..........196,322
Illuminated Entry....................... 20
Instrument Cluster..................133,190
Intensity Control....................... 138
Interior............................. 138
Lights On Reminder.................... 135
Low Fuel............................ 190
LowTire ............................ 190
Malfunction Indicator (Check Engine)........ 193Map Reading......................... 138
Oil Pressure.......................... 195
Parade Mode (Daytime Brightness).......... 139
Park............................... 133
Passing............................. 137
Rear Servicing........................ 445
Rear Tail............................ 445
Seat Belt Reminder..................... 202
Service.............................. 443
Service Engine Soon (Malfunction Indicator) . . . 193
Side Marker.......................... 444
Tire Pressure Monitoring (TPMS)........190,346
Tow/Haul Indicator.................... 196
Traction Control.................194,324,328
Transfer Case......................295,301
Turn Signal.............82,133,136,194,444,445
Vanity Mirror.......................... 91
Warning (Instrument Cluster Description)..... 190
Load Floor, Cargo....................... 174
INDEX 481
10

Loading Vehicle......................... 361
Tires ............................... 333
Locks................................. 29
Auto Unlock.......................... 32
Automatic Door........................ 31
Child Protection........................ 33
Door................................ 29
Power Door........................... 31
Steering Wheel......................... 18
Low Tire Pressure System.................. 346
Lower Anchors and Tether for CHildren
(LATCH)............................73,74
Lubrication, Body....................... 413
Luggage Carrier......................... 182
Lumbar Support........................ 120
Maintenance Free Battery.................. 409
Maintenance, General..................... 402
Maintenance Procedures................... 402Maintenance Schedule.................... 452
Maintenance, Sunroof..................... 164
Malfunction Indicator Light (Check Engine) . . 193,400
Manual, Service......................... 464
Manual Transmission..................288,426
Fluid Level Check...................... 426
Lubricant Selection..................426,449
Shift Speeds.......................... 291
Map/Reading Lights..................... 138
Marker Lights, Side...................... 444
Master Cylinder (Brakes).................. 423
Memory Feature (Memory Seat)............. 127
Memory Seat........................... 127
Memory Seats and Radio.................. 127
Methanol............................. 356
Mini-Trip Computer...................... 210
Mirrors................................ 88
Automatic Dimming..................... 88
Electric Powered....................... 90
482 INDEX

Reminder............................ 202
Shoulder Belt Anchorage.................. 46
Untwisting Procedure.................... 47
Seats................................. 118
Adjustment.......................... 118
Cleaning............................ 432
Easy Entry........................... 129
Head Restraints....................... 122
Heated............................. 123
Height Adjustment..................... 121
Lumbar Support....................... 120
Memory............................. 127
Power.............................. 121
Rear Folding......................... 124
Reclining............................ 119
Seatback Release....................... 124
Tilting.............................. 121
Security Alarm (Theft Alarm).............18,204
Selection of Coolant (Antifreeze)..........417,448Selection of Oil......................... 404
Selec-Trac Operation...................... 298
Sentry Key (Immobilizer)................... 14
Sentry Key Programming................... 16
Sentry Key Replacement................... 16
Service Assistance....................... 460
Service Contract......................... 462
Service Engine Soon Light (Malfunction
Indicator)............................. 193
Service Manuals........................ 464
Setting the Clock..................224,239,243
Settings, Personal........................ 216
Shift Lock Manual Override................ 281
Shift Speeds, Manual Transmission........... 291
Shifting............................... 281
Automatic Transmission...............281,283
Manual Transmission................... 288
Transfer Case.................292,294,298,300
Shoulder Belts........................... 42
INDEX 487
10

Tread Wear Indicators................... 341
To Open Hood.......................... 131
Tongue Weight/Trailer Weight.............. 371
Torque Converter Clutch.................. 287
Tow/Haul............................. 286
Tow/Haul Indicator Light...............196,286
Towing............................286,364
Behind a Motor Home.................. 378
Disabled Vehicle....................... 393
Guide.............................. 369
Recreational.......................... 378
Weight.............................. 369
Towing Vehicle Behind a Motor Home......... 378
Traction Control......................194,316
Trailer Sway Control (TSC)................. 318
Trailer Towing.......................286,364
Cooling System Tips.................... 378
Hitches............................. 368
Minimum Requirements................. 372Trailer and Tongue Weight................ 371
Wiring.............................. 375
Trailer Towing Guide..................... 369
Trailer Weight.......................... 369
Transfer Case........................... 426
Fluid............................426,449
Four-Wheel-Drive Operation.............. 292
Maintenance.......................... 426
Transmission........................... 283
Automatic........................281,283
Fluid............................... 449
Maintenance.......................425,426
Manual............................. 288
Range Indicator....................... 283
Shifting............................. 281
Transmitter Battery Service (Remote Keyless
Entry)................................. 25
Transmitter, Garage Door Opener (HomeLinkt) . . 155
490 INDEX