2012 JEEP GRAND CHEROKEE fuel cap

INSTRUMENT CLUSTER
DESCRIPTIONS
1. Tachometer
Indicates the engine speed in revolutions per
minute (RPM x 1000).
2. Air Bag Warning LightThis light will turn on for four to
eight seconds as a bulb check
when the ignition switch is first
turned to the ON/RUN position. If
the light is either not on during
starting, stays on, or turns on while
driving, have the system inspected at an au-
thorized dealer as soon as possible. Refer to
“Occupant Restraints” in “Things To Know Be-
fore Starting Your Vehicle” for further informa-
tion.
3. Malfunction Indicator Light (MIL) The Malfunction Indicator Light (MIL)
is part of an onboard diagnostic sys-
tem called OBD II that monitors en-
gine and automatic transmission con-
trol systems. The light will illuminate
when the key is in the ON/RUN position before
engine start. If the bulb does not come on when turning the key from OFF to ON/RUN, 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 situa-
tions, the vehicle will drive normally and will not
require towing.
CAUTION!
Prolonged driving with the MIL on could cause
damage to the engine control system. It also
could affect fuel economy and drivability. If the
MIL is flashing, severe catalytic converter
damage and power loss will soon occur. Im-
mediate service is required.
WARNING!
A malfunctioning catalytic converter, as refer-
enced above, can reach higher temperatures
than in normal operating conditions. This can
cause a fire if you drive slowly or park over
flammable substances such as dry plants,
wood, cardboard, etc. This could result in
death or serious injury to the driver, occupants
or others.
4. Electronic Stability Control (ESC)
Activation/Malfunction Indicator Light — If
Equipped The “ESC Activation/Malfunction
Indicator Light” in the instrument
cluster will come on when the igni-
tion switch is turned to the ON/
RUN position. It should go out with
the engine running. If the “ESC
Activation/Malfunction Indicator Light” comes
on continuously with the engine running, a
malfunction has been detected in the ESC
system. If this light remains on after several
ignition cycles, and the vehicle has been driven
several miles (kilometers) at speeds greater
159

steering effort, especially at very low ve-
hicle speeds and during parking maneu-
vers.
• If the condition persists, see your autho-
rized dealer for service.
EVIC Amber Telltale LightsThis area will show reconfigurable amber cau-
tion telltales. These telltales include:
•Forward Collision Warning (FCW) OFF
This light warns the driver of a
potential collision with the vehicle
in front and prompts the driver to
take action in order to avoid the
collision. For further information,
refer to “Adaptive Cruise Control
(ACC)” in “Understanding The Features Of Your
Vehicle.”
• Wait To Start Light — Diesel Only
This light will illuminate when the igni-
tion switch is first turned to the RUN
position. Wait until the light turns off
before starting the vehicle. Refer to “Starting
Procedures” in “Starting And Operating”. •
Water In Fuel Indicator — Diesel Only
This light indicates water has col-
lected in the fuel filter and should
be drained immediately. See your
authorized dealer for service.
• Air Suspension Up
The air suspension up telltale will
illuminate when the air suspension
is in use. For further information,
refer to “Starting And Operating”.
• Air Suspension Down
The air suspension down telltale
will illuminate when the air suspen-
sion is in use. For further informa-
tion, refer to “Starting And Operat-
ing”.
• Low Fuel Light
When the fuel level reaches approxi-
mately 3.0 gal (11.0 L) this light will turn
on, and remain on until fuel is added. •
Loose Gascap Indicator
If the vehicle diagnostic system
determines that the fuel filler cap is
loose, improperly installed, or
damaged, a loose gascap indica-
tor will display in the telltale display
area. Tighten the fuel filler cap
properly and press the SELECT button to turn
off the message. If the problem continues, the
message will appear the next time the vehicle is
started.
A loose, improperly installed, or damaged fuel
filler cap may also turn on the Malfunction
Indicator Light (MIL).
• Windshield Washer Fluid Low Indicator
This light will turn on to indicate the
windshield washer fluid is low.
• SERV 4WD
The SERV 4WD light monitors the
electric shift 4WD system. If the
SERV 4WD light stays on or comes
on during driving, it means that the
170

•FUEL REQUIREMENTS — DIESEL ENGINE ........... 264
• ADDING FUEL ............................ 265
• Fuel Filler Cap (Gas Cap) ................... 265
• Loose Fuel Filler Cap Message ................ 266
• TRAILER TOWING ......................... 266
• Common Towing Definitions ................. 266
• Breakaway Cable Attachment ................. 268
• Trailer Towing Weights (Maximum Trailer Weight
Ratings) .............................. 270
• Trailer And Tongue Weight .................. 270
• Towing Requirements ..................... 271
• Towing Tips ........................... 274
• RECREATIONAL TOWING (BEHIND MOTORHOME, ETC) . . . 276
• Towing This Vehicle Behind Another Vehicle ........ 276
• Recreational Towing — Quadra–
Trac II /Quadra–Drive II Four-Wheel Drive Models . . . 277
215

LOCK position, wait 10 to 15 seconds, then
repeat the “Normal Starting” procedure.
CAUTION!
To prevent damage to the starter, wait 10 to
15 seconds before trying again.
After StartingThe idle speed is controlled automatically and it
will decrease as the engine warms up.
Normal Starting – Diesel EngineObserve the following when the engine is op-
erating.
•All message center lights are off.
• Malfunction Indicator Light (MIL) is off.
• Low Oil Pressure Light is off.
Cold Weather Precautions
Operation in ambient temperature below 32°F
(0°C) may require special considerations. The
following chart suggests these options. *No. 1 Ultra Low Sulfur Diesel Fuel (ULSD)
should only be used where extended arctic
conditions (-10°F/-23°C) exist.
NOTE:
•
Use of Climatized ULSD Diesel Fuel or
Number 1 ULSD Diesel Fuel results in a
noticeable decrease in fuel economy.
• Climatized ULSD Diesel Fuel is a blend of
Number 2 ULSD and Number 1 ULSD
Diesel Fuels, which reduces the tempera-
ture at which wax crystals form in fuel.
NOTE:
This engine requires the use of “Ultra Low
Sulfur Diesel Fuel.” Use of incorrect fuel
could result in exhaust system damage. Re- fer to “Fuel Requirements – Diesel Engine”
in “Starting and Operating” for further infor-
mation.
Battery Blanket Usage
A battery loses 60% of its cranking power as
the battery temperature decreases to 0°F
(-18°C). For the same decrease in temperature,
the engine requires twice as much power to
crank at the same RPM. The use of battery
blankets will greatly increase starting capability
at low temperatures. Suitable battery blankets
are available from your authorized MOPAR
dealer.
Engine Starting Procedure
WARNING!
Never pour fuel or other flammable liquid into
the air inlet opening in an attempt to start the
vehicle. This could result in a flash fire causing
serious personal injury.
1. The shift lever must be in the NEUTRAL or
PARK position before you can start the engine.
2. With your foot on the brake pedal, press the
ENGINE START/STOP button.
219

CAUTION!(Continued)
• After inspecting or adjusting the tire pres-
sure always reinstall the valve stem cap.
This will prevent moisture and dirt from
entering the valve stem, which could dam-
age the Tire Pressure Monitoring Sensor.
NOTE:
• The TPMS is not intended to replace nor-
mal tire care and maintenance, or to pro-
vide warning of a tire failure or condition.
• The TPMS should not be used as a tire
pressure gauge while adjusting your tire
pressure.
• Driving on a significantly under-inflated
tire causes the tire to overheat and can
lead to tire failure. Under-inflation also
reduces fuel efficiency and tire tread life,
and may affect the vehicle’s handling and
stopping ability.
• The TPMS is not a substitute for proper
tire maintenance, and it is the driver’s
responsibility to maintain correct tire
pressure using an accurate tire gauge,
even if under-inflation has not reached the level to trigger the display of the “TPM
Telltale Light” and the “TIRE LOW PRES-
SURE” message.
• Seasonal temperature changes will affect
tire pressure, and the TPMS will monitor
the actual tire pressure in the tire.
Base SystemThe Tire Pressure Monitor System (TPMS) uses
wireless technology with wheel rim-mounted
electronic sensors to monitor tire pressure lev-
els. Sensors, mounted to each wheel as part of
the valve stem, transmit tire pressure readings
to the Receiver Module.
NOTE:
It is particularly important, for you to regu-
larly check the tire pressure in all of your
tires, and to maintain the proper pressure.
The TPMS consists of the following compo-
nents:
•Receiver Module
• Four Tire Pressure Monitoring Sensors
• Tire Pressure Monitoring Telltale Light A low spare tire will not cause the “Tire Pressure
Monitoring Telltale Light” to illuminate, a warn-
ing message to appear, or the chime to sound.
The “Tire Pressure Monitoring Telltale
Light” will illuminate in the instrument
cluster, a “TIRE LOW PRESSURE”
message will display in the instrument
cluster for 5 seconds, and an audible chime will
be activated, when one or more of the four
active road tire pressures are low. Should this
occur, you should stop as soon as possible,
check the inflation pressure of each tire on your
vehicle, and inflate each tire to the vehicle’s
recommended cold placard pressure value.
The system will automatically update and the
“Tire Pressure Monitoring Telltale Light” will
extinguish, once the updated tire pressures
have been received. The vehicle may need to
be driven for up to 20 minutes above 15 mph
(24 km/h) to receive this information.
The “Tire Pressure Monitoring Telltale Light” will
flash on and off for 75 seconds, and remain on
solid when a system fault is detected. In addi-
tion, a “SERVICE TPM SYSTEM” message may
be displayed for approximately 5 seconds
when a system fault is detected, and a chime
258

WARNING!
Do not use alcohol or gasoline as a fuel-
blending agent. They can be unstable under
certain conditions and hazardous or explosive
when mixed with diesel fuel.
Diesel fuel is seldom completely free of water.
To prevent fuel system trouble, drain the accu-
mulated water from the fuel/water separator
using the provided fuel/water separator drain. If
you buy good quality fuel and follow the cold
weather advice above, fuel conditioners should
not be required in your vehicle. If available in
your area, a high cetane “premium” diesel fuel
may offer improved cold-starting and warm-up
performance.
ADDING FUEL
Fuel Filler Cap (Gas Cap)
The gas cap is located behind the locking fuel
filler door, on the driver’s side of the vehicle. If
the gas cap is lost or damaged, be sure the
replacement cap is for use with this vehicle.
1. Press the fuel filler door release switch (lo-
cated under the headlamp switch). 2. Open the fuel filler door, and remove the fuel
filler cap.
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 aftermarket cap can
cause the “Malfunction Indicator Light
(MIL)” to illuminate, due to fuel vapors
escaping from the system.
• A poorly fitting gas cap may cause the MIL
to turn on.
• To avoid fuel spillage and overfilling, do not
“top off” the fuel tank after filling.
WARNING!
•Never have any smoking materials lit in or
near the vehicle when the gas cap is re-
moved or the tank is being filled.
• Never add fuel when the engine is running.
This is in violation of most state and federal
fire regulations and may cause the mal-
function indicator light to turn on.
(Continued)
Fuel Filler Door Release Switch
Fuel Filler Cap
265

WARNING!(Continued)
• 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.
NOTE:
• When the fuel nozzle “clicks” or shuts off,
the fuel tank is full.
• Tighten the gas cap about one-quarter
turn until you hear one click. This is an
indication that the cap is properly tight-
ened.
• If the gas cap is not tighten properly, the
MIL will come on. Be sure the gas cap is
tightened every time the vehicle is refu-
eled.
Emergency Fuel Filler Door Release
If you are unable to open the fuel filler door, use
the fuel filler door emergency release.
1. Open the liftgate.
2. Push down on the inboard edge of the left
storage bin, this will pop up the outboard edge. 3. Grab popped up outboard edge with other
hand to disengage snaps.
4. Remove the storage bin.
5. Pull the release cable.
Loose Fuel Filler Cap Message
If the vehicle diagnostic system
determines that the fuel filler cap is
loose, improperly installed, or
damaged, a loose gascap indica-
tor will display in the EVIC telltale
display area. Refer to “Electronic
Vehicle Information Center (EVIC)” in “Under- standing Your Instrument Panel” for further in-
formation. Tighten the fuel filler cap properly
and press the SELECT button to turn off the
message. If the problem continues, the mes-
sage will appear the next time the vehicle is
started.
TRAILER TOWINGIn 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 review this information
to tow your load as efficiently and safely as
possible.
To maintain warranty coverage, follow the re-
quirements and recommendations in this
manual concerning vehicles used for trailer
towing.
Common Towing DefinitionsThe following trailer towing related definitions
will assist you in understanding the following
information.
Release Cable
266

7
MAINTAINING YOUR VEHICLE
•ENGINE COMPARTMENT — 3.6L ................. 298
• ENGINE COMPARTMENT — 5.7L ................. 299
• ENGINE COMPARTMENT – 3.0L DIESEL ............ 300
• ONBOARD DIAGNOSTIC SYSTEM – OBD II ........... 301
• Loose Fuel Filler Cap Message ................ 301
• REPLACEMENT PARTS ...................... 301
• MAINTENANCE PROCEDURES .................. 301
• Engine Oil – Gasoline Engines ................ 302
• Engine Oil – Diesel Engine .................. 303
• Synthetic Engine Oils ..................... 303
• Materials Added To Engine Oils ............... 304
• Disposing Of Used Engine Oil And Filters ......... 304
• Engine Oil Filter ......................... 304
• Engine Air Cleaner Filter .................... 304
• Maintenance-Free Battery ................... 304
• Air Conditioner Maintenance ................. 305
295