
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 (MIL).” 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 authorized dealer for service as
soon as possible.
CAUTION!
•Prolonged driving with the MIL 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 performed.
• If the MIL is flashing while the engine is running,
severe catalytic converter damage and power loss
will soon occur. Immediate service is required.
614 MAINTAINING YOUR VEHICLE

Loose Fuel Filler Cap Message
If the vehicle diagnostic system determines that the fuel
filler cap is loose, improperly installed, or damaged, a
“gASCAP” message will display in the odometer or a
“CHECK GASCAP” message will be displayed in the
Electronic Vehicle Information Center (EVIC). Refer to
“Electronic Vehicle Information Center (EVIC)” in “Un-
derstanding Your Instrument Panel” for further informa-
tion. Tighten the gas cap until a “clicking” sound is
heard. This is an indication that the gas cap is properly
tightened.
Push 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 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 that require an Inspection and Mainte-
nance (I/M), this check verifies the “Malfunction
Indicator Light (MIL)” is functioning and is not
on when the engine is running, and that the OBD II
system is ready for testing.
Normally, the OBD II system will be ready. The OBD II
system may notbe ready if your vehicle was recently
serviced, recently had a dead battery or a battery replace-
ment. If the OBD II system should be determined not
ready for the I/M test, your vehicle may fail the test.
7
MAINTAINING YOUR VEHICLE 615

Your vehicle has a simple ignition actuated test, which
you can use prior to going to the test station. To check if
your vehicle’s OBD II system is ready, you must do the
following:
1. Cycle the ignition switch to the ON position, but donot crank or start the engine.
NOTE: If you crank or start the engine, you will have to
start this test over.
2. As soon as you cycle the ignition switch to the ON position, you will see the Malfunction Indicator Light
(MIL) symbol come on as part of a normal bulb check.
3. Approximately 15 seconds later, one of two things will happen:
• The MIL will flash for about 10 seconds and then
return to being fully illuminated until you turn OFF the ignition or start the engine. This means that your
vehicle’s OBD II system is
not readyand you should
not proceed to the I/M station.
• The MIL will not flash at all and will remain fully
illuminated until you place the ignition in the off
position or start the engine. This means that your
vehicle’s OBD II system is readyand you can proceed
to the I/M station.
If your OBD II system is not ready,you should see your
authorized dealer or repair facility. If your vehicle was
recently serviced or had a battery failure or replacement,
you may need to do nothing more than drive your
vehicle as you normally would in order for your OBD II
system to update. A recheck with the above test routine
may then indicate that the system is now ready.
Regardless of whether your vehicle’s OBD II system is
ready or not, if the MIL is illuminated during normal
vehicle operation you should have your vehicle serviced
616 MAINTAINING YOUR VEHICLE

MAINTENANCE SCHEDULE
Your vehicle is equipped with an automatic oil change
indicator system. The oil change indicator system will
remind you that it is time to take your vehicle in for
scheduled maintenance.
Based on engine operation conditions, the oil change
indicator message will illuminate. This means that ser-
vice is required for your vehicle. Operating conditions
such as frequent short-trips, trailer tow, extremely hot or
cold ambient temperatures, and E85 fuel usage will
influence when the “Oil Change Required” message is
displayed. Severe Operating Conditions can cause the
change oil message to illuminate as early as 3,500 miles
(5,600 km) since last reset. Have your vehicle serviced as
soon as possible, within the next 500 miles (805 km).
Your authorized dealer will reset the oil change indicator
message after completing the scheduled oil change. If a
scheduled oil change is performed by someone otherthan your authorized dealer, the message can be reset by
referring to the steps described under “Electronic Vehicle
Information Center (EVIC)” in “Understanding Your
Instrument Panel” for further information.
NOTE:
Under no circumstances should oil change inter-
vals exceed 10,000 miles (16,000 km), twelve months or
350 hours of engine run time, whichever comes first. The
350 hours of engine run or idle time is generally only a
concern for fleet customers.
Severe Duty All Models
Change Engine Oil at 4,000 miles (6,500 km) if the vehicle
is operated in a dusty and off road environment or is
operated predominately at idle or only very low engine
RPM’s. This type of vehicle use is considered Severe
Duty.
666 MAINTENANCE SCHEDULES

Interior............................. .225
License ............................. .659
Lights On Reminder .....................224
Low Fuel ............................ .328
Malfunction Indicator (Check Engine) .........329
Park ............................ .336, 657
Passing ............................. .229
Reading ............................. .250
Rear Servicing ........................ .658
Rear Tail Lamps ....................... .658
Seat Belt Reminder ..................... .316
Security Alarm ........................ .324
Service .......................... .655, 657
Side Marker .......................... .658
Tire Pressure Monitoring (TPMS) ............332
Traction Control ....................... .498
Turn Signal ..................122, 335, 657, 658
Warning (Instrument Cluster Description) . . .322, 335
Loading Vehicle ....................282, 546, 548 Capacities
........................... .548
Tires ............................... .507
Load Leveling System ..................... .291
Locks ..................................34
Door .................................34
Lubrication, Body ........................ .627
Luggage Rack (Roof Rack) ...................291
Lug Nuts .............................. .580
Maintenance Free Battery ....................624
Maintenance Procedures ....................617
Maintenance Schedule ..................... .666
Malfunction Indicator Light (Check Engine) . . .329, 615
Manual, Service ......................... .679
Map/Reading Lights ...................... .250
Memory Feature (Memory Seat) ...............216
Memory Seat ........................ .134, 216
Methanol .............................. .537
Mini-Trip Computer ...................... .347
694 INDEX

Sway Control, Trailer...................... .500
Synthetic Engine Oil ...................... .620
System, Remote Starting .....................30
Telescoping Steering Column .................233
Temperature Control, Automatic (ATC) ..........448
Tilt Steering Column ...................... .233
Tire And Loading Information Placard .......507, 508
Tire Markings ........................... .501
Tires........................... .122, 512, 681
Aging (Life Of Tires) .....................522
Air Pressure .......................... .512
Chains .............................. .524
Changing ............................ .581
Compact Spare ........................ .519
General Information .....................512
High Speed .......................... .515
Inflation Pressures ...................... .513
Jacking .......................... .581, 589Life Of Tires
.......................... .522
Load Capacity ..................... .507, 508
Pressure Monitor System (TPMS) ............527
Pressure Warning Light ...................332
Quality Grading ....................... .681
Radial .............................. .515
Replacement .......................... .523
Rotation ............................. .526
Safety ........................... .501, 512
Sizes ............................... .502
Snow Tires ........................... .517
Spare Tire ............................ .583
Spinning ............................ .521
Trailer Towing ........................ .557
Tread Wear Indicators ....................521
Tire Safety Information .....................501
Tire Service Kit .......................... .568
T
ongue Weight/Trailer Weight ................554
Torque Converter Clutch ....................480
700 INDEX

Towing............................... .549
24-Hour Towing Assistance ................160
Disabled Vehicle ....................... .607
Guide .............................. .553
Recreational .......................... .562
Weight .............................. .553
Towing Assistance ........................ .160
Towing Vehicle Behind A Motorhome ...........562
Traction ............................... .481
Traction Control ......................... .495
Trailer Sway Control (TSC) ..................500
Trailer Towing .......................... .549
Cooling System Tips .....................561
Hitches ............................. .551
Minimum Requirements ..................555
Tips................................ .560
Trailer And Tongue Weight ................554
Wiring .............................. .558
Trailer Towing Guide ...................... .553Trailer Weight
........................... .553
Transmission ........................... .638
Automatic ........................ .468, 638
Fluid ............................ .638, 663
Transmitter Battery Service (Remote Keyless Entry) . .28
Transmitter, Garage Door Opener (HomeLink) .....254
Transmitter, Remote Keyless Entry (RKE) .........20
Transporting Pets .........................117
Tread Wear Indicators ..................... .521
Turn Signals ..................... .335, 657, 658
UCI Connector .......................... .384
Uconnect Advanced Phone Connectivity ..............163
Uconnect 130 Operating Instructions Auxiliary Mode ........367
Operating Instructions CD Mode ............362
Operating Instructions Radio Mode ..........359
Playing MP3 Files ...................... .365
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INDEX 701