2006 JEEP GRAND CHEROKEE fuel cap

engine start. If the bulb does not come on when turning
the key from OFF to ON, have the condition checked
promptly.
Certain conditions such as a loose or missing gas cap,
poor fuel quality, etc. may illuminate the light after
engine start. The vehicle should be serviced if the light
stays on through several of your typical driving cycles. In
most situations the vehicle will drive normally and will
not require towing.
The Malfunction Indicator Light flashes to alert you to
serious conditions that could lead to immediate loss of
power or severe catalytic converter damage. The vehicle
should be serviced as soon as possible if this occurs. (See
page 297 for more information.)6. Airbag Warning Light
This light turns on and remains on for 6 to 8
seconds as a bulb check when the ignition
switch is first turned ON. If the light is not on
during starting, stays on, or turns on while
driving, have the system inspected by an authorized
dealer as soon as possible.
7. Anti-Lock Brake Warning Light
This light monitors the Anti-Lock Brake System.
The light will turn on when the ignition switch is
turned to the ON position and may stay on for as long as
four seconds.
If the ABS light remains on or turns on while driving, it
indicates that the Anti-Lock portion of the brake system
is not functioning and that service is required. However,
the conventional brake system will continue to operate
normally if the BRAKE warning light is not on.
UNDERSTANDING YOUR INSTRUMENT PANEL 177
4

▫Tire Loading And Tire Pressure...........252

Tires — General Information...............256
▫Run Flat Tires........................256
▫Tire Pressure.........................257
▫Tire Inflation Pressures.................258
▫Tire Pressures For High Speed Operation....260
▫Radial-Ply Tires......................261
▫Tire Spinning........................261
▫Tread Wear Indicators..................262
▫Life Of Tire.........................262
▫Replacement Tires.....................263
▫Alignment And Balance.................264

Tire Pressure Monitor System (TPMS)........265▫Premium System......................265
▫General Information...................268

Tire Rotation Recommendations............268

Fuel Requirements......................268
▫Spark Knock.........................268
▫Reformulated Gasoline.................269
▫Gasoline/Oxygenate Blends..............269
▫MMT In Gasoline.....................270
▫Materials Added To Fuel................270
▫Fuel System Cautions..................270
▫Carbon Monoxide Warnings..............271

Fuel Tank Filler Cap (Gas Cap).............272
▫Loose Fuel Filler Cap Message............273
232 STARTING AND OPERATING

•Guard against carbon monoxide with proper mainte-
nance. Have the exhaust system inspected every time
the vehicle is raised. Have any abnormal conditions
repaired promptly. Until repaired, drive with all side
windows fully open.
•Keep the trunk closed when driving your vehicle to
prevent carbon monoxide and other poisonous ex-
haust gases from entering the vehicle.
FUEL TANK FILLER CAP (GAS CAP)
The fuel cap is located on the left side of the vehicle. If the
fuel cap is lost or damaged, be sure the replacement cap
is for use with this vehicle.
Fuel Filler Cap Location
272 STARTING AND OPERATING

CAUTION!
Damage to the fuel system or emission control
system could result from using an improper fuel cap
(gas cap). A poorly fitting cap could let impurities
into the fuel system. Also, a poorly fitting after-
market cap can cause the MIL (Malfunction Indica-
tor Light) to illuminate, due to fuel vapors escaping
from the system.
•Turn the engine off.
•Rotate the fuel cap to the left to remove.
•To replace the cap, insert it into the filler neck and
tighten the cap about 1/4 turn until you hear one click.
This is an indication that the cap is properly tightened.
•Make sure that the fuel cap tether strap is not caught
under the fuel cap.
CAUTION!
To avoid fuel spillage and overfilling, do not “top
off” the fuel tank after filling.
NOTE:When the fuel nozzle “clicks” or shuts off, the
fuel tank is full.
Loose Fuel Filler Cap Message
If the vehicle diagnostic system determines that the fuel
filler cap is loose, improperly installed, or damaged, a
“CHECK GAS CAP” message will be displayed in the
EVIC (Electronic Vehicle Information Center). Refer to
“Electronic Vehicle Information Center” in Section 4 of this
manual. Tighten the fuel filler cap properly and press the
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 “Onboard Diagnostic System
— OBDII” in Section 7 of this manual for more information.
STARTING AND OPERATING 273
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WARNING!
•Remove the fuel cap (gas cap) slowly to prevent
fuel spray from the filler neck which may cause
injury.
•The volatility of some gasoline may cause a
buildup of pressure in the fuel tank that may
increase while you drive. This pressure can result
in a spray of gasoline and/or vapors when the cap
is removed from a hot vehicle. Removing the cap
slowly allows the pressure to vent and prevents
fuel spray.
•Never have any smoking materials lit in or near
the vehicle when the fuel cap is removed or the
tank filled.
•Never add fuel to the vehicle when the engine is
running.
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.
TRAILER TOWING
In this section you will find safety tips and information
on limits to the type of towing you can reasonably do
with your vehicle. Before towing a trailer carefully re-
view this information to tow your load as efficiently and
safely as possible.
To maintain warranty coverage, follow the requirements
and recommendations in this manual concerning ve-
hicles used for trailer towing.
274 STARTING AND OPERATING

MAINTAINING YOUR VEHICLE
CONTENTS

6.1L Engine...........................296

Onboard Diagnostic System — OBD II........297
▫Loose Fuel Filler Cap Message............297

Emissions Inspection And Maintenance
Programs............................298

Replacement Parts......................299

Dealer Service.........................300

Maintenance Procedures..................300
▫Engine Oil..........................301▫Engine Oil Filter......................304
▫Drive Belts — Check Condition And
Tensioner...........................304
▫Spark Plugs.........................305
▫Engine Air Cleaner Filter................305
▫Fuel Filter..........................305
▫Catalytic Converter....................306
▫Maintenance-Free Battery................307
▫Air Conditioner Maintenance.............309
7

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 297
7

FLUID CAPACITIES
U.S. Metric
Fuel (Approximate)20.6 Gallons 78 Liters
Engine Oil with Filter
6.1 Liter Engine (SAE 0W-40, API Certified) 7 Qts 6.6 Liters
Cooling System *
6.1 Liter Engine (MoparEngine Coolant/Antifreeze 5 Year/
100,000 Mile Formula)14.8 Qts 14 Liters
* Includes heater and coolant recovery bottle filled to MAX level.
MAINTAINING YOUR VEHICLE 341
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