2007 JEEP PATRIOT 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
transaxle control systems. When these systems are oper-
ating properly, your vehicle will provide excellent per-
formance and fuel economy, as well as engine emissions
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 343
7

Loose Fuel Filler Cap Message
After fuel is added, the vehicle diagnostic system can
determine if the fuel filler cap is possible loose or
improperly installed. A GASCAP message will be dis-
played in the instrument cluster. Tighten the gas cap until
a9clicking9sound is heard. This is an indication that the
gas cap is properly tightened. 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.
344 MAINTAINING YOUR VEHICLE

Checking the oil while the vehicle is on level ground and
only when the engine is hot, will improve the accuracy of
the oil level readings. Maintain the oil level between the
range markings on the dipstick. The range markings will
consist of a crosshatch zone that says SAFE or a cross-
hatch zone that says MIN at the low end of the range and
MAX at the high end of the range. Adding one quart of
oil when the reading is at the low end of the indicated
range will result in the oil level at the full end of the
indicator range.
CAUTION!
Do not overfill the engine. Overfilling the engine as
indicated by the range markings, as described above,
on the engine oil dipstick will cause oil aeration,
which can lead to loss of oil pressure and an increase
in oil temperature. This could damage your engine.
Change Engine Oil
Road conditions and your kind of driving affects the
interval at which your oil should be changed. Check the
following list to decide if any apply to you.
²Day and night temperatures are below 32ÉF (0ÉC).
²Stop and Go driving.
²Extensive engine idling.
²Driving in dusty conditions.
²Short trips of less than 10 miles (16 km).
²More than 50% of your driving is at sustained high
speeds during hot weather, above 90ÉF (32ÉC).
²Trailer towing.
²Taxi, Police or delivery service (commercial service).
²Off-Road or desert operation.
348 MAINTAINING YOUR VEHICLE

CD (Compact Disc) Player Maintenance........ 222
Cellular Phone........................82,223
Center High Mounted Stop Light............ 387
Chains, Tire............................ 301
Changing A Flat Tire..................... 326
Chart, Tire Sizing........................ 278
Check Engine Light (Malfunction Indicator Light) . 344
Child Restraint.......................... 60
Child Restraint Tether Anchors............... 64
Child Restraint with Automatic Belts........... 63
Child Safety Locks........................ 23
Child Seat.............................. 66
Clean Air Gasoline....................... 303
Cleaning
Wheels............................. 373
Climate Control......................... 223
Clock........................190,193,201,213
Clutch............................... 367
Clutch Fluid........................... 367Coin Holder........................... 151
Compact Disc (CD) Maintenance............. 222
Compact Spare Tire...................... 289
Compass.............................. 188
Compass Calibration..................... 188
Compass Variance....................... 186
Console.............................. 151
Contract, Service........................ 414
Coolant (Antifreeze)...................... 388
Cooling System......................... 360
Adding Coolant (Antifreeze).............. 362
Coolant Level......................360,363
Disposal of Used Coolant................ 363
Drain, Flush, and Refill.................. 360
Inspection........................... 363
Points to Remember.................362,364
Pressure Cap......................... 362
Selection of Coolant (Antifreeze)........... 361
Corrosion Protection..................... 371
424 INDEX

Headlight Switch...................... 119
Headlights........................... 119
High Beam Indicator.................... 170
Instrument Cluster..................... 119
License............................. 386
Lights On Reminder.................... 120
Low Fuel............................ 170
Malfunction Indicator (Check Engine)........ 177
Map Reading......................... 118
Oil Pressure.......................... 170
Seat Belt Reminder..................... 171
Security Alarm (Theft Alarm).............. 31
Theft Alarm (Security Alarm).............. 173
Traction Control....................... 141
Turn Signal.................. 119,121,170,384
Voltage............................. 169
Warning (Instrument Cluster Description)..... 169
Loading Vehicle......................... 309
Tires ............................... 281Locks
Child Protection........................ 23
Door................................ 18
Power Door........................... 19
Steering Wheel......................... 17
Lubrication, Body....................... 358
Luggage Rack (Roof Rack)................. 160
Lumbar Support........................ 109
Maintenance Free Battery.................. 354
Maintenance, General..................... 347
Maintenance Procedures................... 347
Maintenance Schedule.................... 392
Schedule ªAº......................... 405
Schedule ªBº......................... 395
Malfunction Indicator Light (Check Engine) . . 177,344
Manual, Service......................... 416
Manual Transaxle..................238,244,369
Downshifting......................... 245
430 INDEX

Hitches............................. 312
Minimum Requirements................. 315
Trailer and Tongue Weight................ 314
Wiring.............................. 319
Trailer Towing Guide..................... 313
Trailer Weight.......................... 313
Transaxle............................. 240
Automatic....................12,237,240,368
Manual........................13,238,244
Operation........................... 240
Overdrive........................... 243
Selection of Lubricant................... 368
Transmission
Range Indicator....................... 174
Transmitter Battery Service (Remote
Keyless Entry)........................... 29
Transmitter, Garage Door Opener (HomeLinkt) . . 130
Transmitter Programming (Remote
Keyless Entry)........................... 27Transporting Pets........................ 68
Tread Wear Indicators.................... 291
Trip Odometer.......................... 176
Trip Odometer Reset Button................ 174
Turn Signals......................121,170,384
UConnectŸ (Hands-Free Phone).............. 82
Understanding Your Instrument Panel......... 167
Uniform Tire Quality Grades................ 417
Universal Transmitter..................... 130
Unleaded Gasoline....................... 303
Vacuum/Vapor Harnesses................. 365
Vanity Mirrors........................... 82
Variance, Compass....................... 186
Vehicle Identification Number (VIN)............ 7
Vehicle Loading......................282,309
Vehicle Modifications/Alterations.............. 8
Vehicle Storage......................... 380
INDEX 437
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