2009 JEEP GRAND CHEROKEE light

CD/DVD MAINTENANCE
To keep a CD/DVD in good condition, take the following
precautions:
1. Handle the disc by its edge; avoid touching the
surface.
2. If the disc is stained, clean the surface with a soft cloth,
wiping from center to edge.
3. Do not apply paper or tape to the disc; avoid scratch-
ing the disc.
4. Do not use solvents such as benzene, thinner, cleaners,
or antistatic sprays.
5. Store the disc in its case after playing.
6. Do not expose the disc to direct sunlight.
7. Do not store the disc where temperatures may become
too high.NOTE:If you experience difficulty in playing a particu-
lar disc, it may be damaged (i.e. scratched, reflective
coating removed, a hair, moisture or dew on the disc)
oversized, or have protection encoding. Try a known
good disc before considering disc player service.
RADIO OPERATION AND CELLULAR PHONES
Under certain conditions, the cellular phone being on in
your vehicle can cause erratic or noisy performance from
your radio. This condition may be lessened or eliminated
by relocating the cellular phone antenna. This condition
is not harmful to the radio. If your radio performance
does not satisfactorily “clear” by the repositioning of the
antenna, it is recommended that the radio volume be
turned down or off during cellular phone operation.
260 UNDERSTANDING YOUR INSTRUMENT PANEL

Recirculation
The recirculation feature can be selected with
the mode control knob. You may choose be-
tween Bi-Level Recirculation and Panel Recir-
culation air outlets while in this mode. Nor-
mally, air enters from outside the vehicle. However, when
in “Recirculation” mode air inside the vehicle is re-used.
Use this mode to rapidly cool the inside of the vehicle.
The “Recirculation” mode can also be used to tempo-
rarily block out outside odors, smoke, and dust.
Air Conditioning
To turn on the Air Conditioning, set the fan control
at any speed and press the snowflake button
located on the control panel. Conditioned air will
be directed through the outlets selected by the mode
control. A light in the snowflake button shows that the air
conditioning is on.Slight changes in engine speed or power may be noticed
when the air conditioning compressor is on. This is a
normal occurrence as the compressor will cycle on and
off to maintain comfort and increase fuel economy.
Automatic Temperature Control — If Equipped
The Automatic Temperature Control System automati-
cally maintains the interior comfort level desired by the
driver and passenger.
264 UNDERSTANDING YOUR INSTRUMENT PANEL

When using the air conditioner in extremely heavy
traffic, in hot weather, especially when towing a trailer,
additional engine cooling may be required. If this situa-
tion is encountered, operate the transmission in a lower
gear to increase engine RPM, coolant flow and fan speed.
When stopped in heavy traffic, it may be necessary to
shift into NEUTRAL and depress the accelerator slightly
for fast idle operation to increase coolant flow and fan
speed.
Your air conditioning system is also equipped with an
automatic recirculation system. When the system senses
a heavy load or high heat conditions, it may use partial
Recirculation A/C mode to provide additional comfort.Winter Operation
When operating the system during the winter months,
make sure the air intake, located directly in front of the
windshield, is free of ice, slush, snow, or other
obstructions.
Vacation Storage
Anytime you store your vehicle, or keep it out of service
(i.e. vacation) for two weeks or more, run the air condi-
tioning system at idle for about five minutes in the fresh
air and high blower setting. This will ensure adequate
system lubrication to minimize the possibility of com-
pressor damage when the system is started again.
272 UNDERSTANDING YOUR INSTRUMENT PANEL

▫HDC (Hill Descent Control) (4WD Models
With NV245 Two–Speed Transfer
Case Only)......................... 323
▫ESP/BAS Warning Light And ESP/TCS
Indicator Light...................... 325
Tire Safety Information................. 326
▫Tire Markings....................... 326
▫Tire Identification Number (TIN)......... 330
▫Tire Loading And Tire Pressure.......... 331
Tires — General Information............. 335
▫Tire Pressure....................... 335
▫Tire Inflation Pressures................ 336
▫Tire Pressures For High Speed Operation . . . 337
▫Radial-Ply Tires..................... 338▫Compact Spare Tire — If Equipped....... 338
▫Limited-Use Spare — If Equipped........ 339
▫Tire Spinning....................... 340
▫Tread Wear Indicators................. 340
▫Life Of Tire........................ 341
▫Replacement Tires.................... 342
Tire Chains.......................... 343
Tire Rotation Recommendations........... 344
Tire Pressure Monitor System (TPMS)....... 345
▫Base System........................ 347
▫Premium System — If Equipped......... 350
▫General Information.................. 355
STARTING AND OPERATING 277
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release it as soon as the starter engages. The starter motor
will disengage automatically in 10 seconds. Once this
occurs, release the accelerator pedal, turn the ignition
switch to the LOCK position, wait 10 to 15 seconds, then
repeat the normal starting procedure.
CAUTION!
To prevent damage to the starter, wait 10 to 15 sec-
onds before trying again.
After Starting
The idle speed is controlled automatically and it will
decrease as the engine warms up.
Normal Starting — Diesel Engines
Observe the following when the engine is operating.
•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 sug-
gests these options.
*No. 1 Ultra Low Sulfur Diesel Fuel (ULSD) should only
be used where extended arctic conditions (-10°F/-23°C)
exist.
282 STARTING AND OPERATING

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 re-
duces the temperature 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. Refer to “Fuel Requirements” in
this section for further details on fuel recommendations.
Battery Blanket Usage
A battery loses 60% of its cranking power as the battery
temperature decreases to 0°F (-18°C). For the same de-
crease in temperature, the engine requires twice as much
power to crank at the same RPM. The use of batteryblankets will greatly increase starting capability at low
temperatures. Suitable battery blankets are available
from your authorized MOPARdealer.
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. Turn the ignition key to the ON position.
3. Watch for the “Wait To Start Light” in the instrument
cluster. Refer to “Instrument Cluster” in Section 4 of this
manual. It will glow for two to ten seconds or more,
STARTING AND OPERATING 283
5

OVER TEMP” message may display, and the transmis-
sion may downshift out of Overdrive until the transmis-
sion cools down. After cool down, the transmission will
resume normal operation.
In high ambient temperatures with sustained high engine
speed and load, an upshift, followed shortly thereafter by
a downshift, may occur. The TOW/HAUL light will turn
off. This is a normal part of the overheat protection
strategy when operating in the TOW/HAUL mode.
The transmission will downshift from Overdrive, to the
most desirable gear, if the accelerator pedal is fully
depressed at vehicle speeds above approximately 35 mph
(56 km/h).
When To Use TOW/HAUL Mode — If Equipped
When driving in hilly areas, towing a trailer, carrying a
heavy load, etc., and frequent transmission shifting oc-
curs, press the TOW/HAUL switch. This will improve
performance and reduce the potential for transmissionoverheating or failure due to excessive shifting. When
operating in TOW/HAUL mode, the transmission will
shift into direct gear and Overdrive will be enabled
under steady cruise conditions.
The “TOW/HAUL” indicator light will illuminate in the
instrument cluster to indicate when the switch has beenTOW/HAUL Switch
STARTING AND OPERATING 293
5

activated. Pressing the switch a second time restores
normal operation. If the TOW/HAUL mode is desired,
the switch must be pressed each time the engine is
started.
Transmission Limp Home Mode
Transmission function is monitored for abnormal condi-
tions. If a condition is detected that could result in
transmission damage, the transmission limp home mode
will be engaged. In this mode, the transmission will
remain in the current gear (3.7L and 3.0L diesel engine) or
in direct gear (4.7L and 5.7L engines) until the vehicle is
brought to a stop.
To reset the transmission, use the following procedure:
1. Stop the vehicle.
2. Move the shift lever into the PARK position.
3. Turn the engine off, and be sure to turn the key to the
LOCK position.4. Wait approximately 10 seconds, then restart the en-
gine.
5. Move the shift lever to the desired gear range.
If the problem is no longer detected, the transmission will
return to normal operation. If the problem persists,
PARK, REVERSE, and NEUTRAL will continue to oper-
ate. Only 2nd gear (3.7L and 3.0L diesel engine) or 3rd
gear (4.7L and 5.7L engines) will be available in the
DRIVE position. Have the transmission checked at your
authorized dealer as soon as possible.
Torque Converter Clutch
A feature, designed to improve fuel economy, has been
included in the automatic transmission on your vehicle.
A clutch within the torque converter engages automati-
cally, at a calibrated speed, at light throttle. It engages at
higher speeds under heavier acceleration. This may re-
sult in a slightly different feeling or response during
normal operation in high gear. When the vehicle speed
294 STARTING AND OPERATING