2008 JEEP COMPASS fuel

NOTE:Tighten the gas cap about 1/4 turn until you
hear one click. This is an indication that cap is properly
tightened.
If the gas cap is not tighten properly, the Malfunction
Indicator Light will come on. Be sure the gas cap is
tightened every time the vehicle is refueled.
WARNING!
A fire may result if gasoline is pumped into a
portable container that is inside of a vehicle. You
could be burned. Always place gas containers on the
ground while filling.
Loose Fuel Filler Cap Message
If the vehicle diagnostic system determines that the fuel
filler cap is loose or improperly installed, a ªGASCAPº
message will be displayed in the Odometer/Trip Odom-
eter in the instrument cluster. Refer to ªInstrument
Cluster Descriptionº in Section 4 of this manual. Tighten
the fuel filler cap properly and press the odometer/trip
odometer reset button to turn the message off. If the
problem continues, the message will appear the next time
the vehicle is started. Refer to ªOnboard Diagnostic
System Ð OBDIIº in Section 7 of this manual for more
information.
CAUTION!
Damage to the fuel system or emission control sys-
tem could result from using an improper fuel tank
filler cap (gas cap). A poorly fitting cap could let
impurities into the fuel system.
280 STARTING AND OPERATING

Towing Tips
Before setting out on a trip, practice turning, stopping
and backing the trailer in an area away from heavy
traffic.
Towing Tips Ð Automatic Transmission
The automatic transmission fluid and filter should be
changed if you REGULARLY tow a trailer for more than
45 minutes of continuous operation. Refer to the ªMain-
tenance Scheduleº in Section 8 for transmission fluid
change intervals.
NOTE:Check the automatic transmission fluid level
before towing.
Towing Tips Ð Electronic Speed Control (If
Equipped)
þ
Don't use in hilly terrain or with heavy loads.
þWhen using the speed control, if you experience speed
drops greater than 10 mph (16 km/h), disengage until
you can get back to cruising speed.
þUse speed control in flat terrain and with light loads to
maximize fuel efficiency.
7- Pin Connector
292 STARTING AND OPERATING

JUMP-STARTING PROCEDURES DUE TO A LOW
BATTERY
WARNING!
Take care to avoid the radiator cooling fan whenever
the hood is raised. It can start anytime the ignition
switch is on. You can be hurt by the fan.
WARNING!
Do not attempt to push or tow your vehicle to get it
started. Vehicles equipped with an automatic trans-
axle cannot be started this way and may be damaged.
Unburned fuel could enter the catalytic converter and
once the engine has started, ignite and damage the
converter and vehicle. If the vehicle has a discharged
battery, booster cables may be used to obtain a start
from another vehicle. This type of start can be
dangerous if done improperly, so follow this proce-
dure carefully.
WHAT TO DO IN EMERGENCIES 303
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MAINTAINING YOUR VEHICLE
CONTENTS
mEngine Compartment Ð Gasoline...........312
mOnboard Diagnostic System Ð OBD II........313
NLoose Fuel Filler Cap Message............314
mEmissions Inspection And Maintenance
Programs............................314
mReplacement Parts......................316
mDealer Service.........................316
mMaintenance Procedures..................317
NEngine Oil..........................317NDrive Belt ± Check Condition.............320
NSpark Plugs.........................320
NCatalytic Converter....................321
NCrankcase Emission Control System........322
NFuel Filter..........................323
NAir Cleaner Element (Filter)..............323
NMaintenance-Free Battery................324
NAir Conditioner Maintenance.............325
NPower Steering Ð Fluid Check............326
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NFront Suspension Ball Joints..............327
NBody Lubrication.....................327
NWindshield Wiper Blades................328
NWindshield Washer Reservoir.............328
NExhaust System......................328
NCooling System.......................329
NHoses And Vacuum/Vapor Harnesses.......335
NFuel System Connections................335
NBrake System........................335
NAutomatic Transaxle (CVT)..............339
NManual Transaxle.....................339
NRear Drive Assembly (RDA) ± AWD/4WD
Models Only........................340NPower Transfer Unit (PTU) ± AWD/4WD
Models Only........................341
NAppearance Care And Protection From
Corrosion...........................341
mFuses/Integrated Power Module (IPM).......347
mVehicle Storage........................350
mReplacement Bulbs......................350
mBulb Replacement......................351
NHeadlamps..........................351
NFog Lights..........................353
NTail Lights, Rear Turn Signals And Backup
Lights Ð Replacement..................354
NLicense Lights........................356
NCenter High-Mounted Stoplight...........358
310 MAINTAINING YOUR VEHICLE

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 313
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.
314 MAINTAINING YOUR VEHICLE

MAINTENANCE PROCEDURES
The pages that follow contain therequiredmaintenance
services determined by the engineers who designed your
vehicle.
Besides the maintenance items for which there are fixed
maintenance intervals, there are other items that should
operate satisfactorily without periodic maintenance.
However, if a malfunction of these items does occur, it
could adversely affect the engine or vehicle performance.
These items should be inspected if a malfunction is
observed or suspected.
Engine Oil
Checking Oil Level
To assure proper engine lubrication, the engine oil must
be maintained at the correct level. Check the oil level at
regular intervals, such as every fuel stop.The best time to check the engine oil level is about 5
minutes after a fully warmed engine is shut off. Do not
check oil level before starting the engine after it has sat
overnight. Checking engine oil level when the engine is
cold will give you an incorrect reading.
Engine Oil Dipstick
MAINTAINING YOUR VEHICLE 317
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