2012 JEEP GRAND CHEROKEE maintenance

To keep the ACC System operating properly, it
is important to note the following maintenance
items:
•Always keep the sensor clean. Carefully
wipe the sensor lens with a soft cloth. Be
cautious not to damage the sensor lens.
• Do not remove any screws from the sensor.
Doing so could cause an ACC system mal-
function or failure and require a sensor re-
alignment.
• If the sensor is damaged due to a collision,
see your authorized dealer for service.
• Do not attach or install any accessories near
the sensor, including transparent material or
aftermarket grilles. Doing so could cause an
ACC system failure or malfunction.
When the condition that deactivated the system
is no longer present, the system will return to
the “Adaptive Cruise Control Off” state and will
resume function by simply reactivating it.
NOTE:
• If the “Clean Radar Sensor In Front Of
Vehicle” message occurs frequently (e.g.
more than once on every trip) without any snow, rain, mud, or other obstruction,
have the radar sensor realigned at your
authorized dealer.
• Installing a snow plow, front-end protec-
tor, an aftermarket grille or modifying the
grille is not recommended. Doing so may
block the sensor and inhibit ACC opera-
tion.
Removing ACC Sensor For Off-Roading
NOTE:
When off-roading, it may be advisable to
remove the ACC sensor. The sensor is lo-
cated behind the front lower grille in the
center of the vehicle. After removing the
lower fascia, you may remove the lower
sensor and bracket assembly.
To remove the sensor follow these instructions:
1. Unplug the connector by depressing the two
tabs on the connector and pulling it out. Do not
pull by the wiring or use any tools to remove the
connector.
2. Remove the wiring christmas tree attach-
ment from the back of the bracket. 3. Remove the two M6 fasteners that connect
the bracket to the bumper.
NOTE:
Do not change the adjustment fasteners or
pull the sensor off of the bracket. Doing so
may misalign the sensor.
Store the sensor and bracket assembly in a
safe location. The wiring and connector must
be stowed properly after the sensor and
bracket assembly is removed.
A connector plug is stowed on top of the
bumper beam. Insert the wiring connector into
the connector plug.
NOTE:
When the sensor is removed, Adaptive
Cruise Control, Normal Cruise Control, and
Forward Collision Warning will not be avail-
able. The cluster will display the warning
“ACC/FCW Unavailable - Service Radar Sen-
sor.”
To reinstall the sensor and bracket assembly
reverse the process above. The fastener torque
required to assembly the bracket back to the
beam is 6.6 ft lbs (9 Nm).
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operation. If an obstruction in the path of the
sunroof is detected, the sunroof will automati-
cally retract. Remove the obstruction if this
occurs. Next, press the switch forward and
release to Express Close.
NOTE:
If three consecutive sunroof close attempts
result in Pinch Protect reversals, the fourth
close attempt will be a Manual Close move-
ment with Pinch Protect disabled.
Venting Sunroof — ExpressPress and release the Vent button within one
half second and the sunroof will open to the
vent position. This is called “Express Vent”, and
it will occur regardless of sunroof position.
During Express Vent operation, any movement
of the switch will stop the sunroof.
Sunshade OperationThe sunshade can be opened manually. How-
ever, the sunshade will open automatically as
the sunroof opens.
NOTE:
The sunshade cannot be closed if the sun-
roof is open.
Wind BuffetingWind buffeting can be described as the per-
ception of pressure on the ears or a helicopter-
type sound in the ears. Your vehicle may exhibit
wind buffeting with the windows down, or the
sunroof (if equipped) is in certain open or
partially open positions. This is a normal occur-
rence and can be minimized. If the buffeting
occurs with the rear windows open, open the
front and rear windows together to minimize the
buffeting. If the buffeting occurs with the sun-
roof open, adjust the sunroof opening to mini-
mize the buffeting or open any window.
Sunroof MaintenanceUse only a nonabrasive cleaner and a soft cloth
to clean the glass panel.
Ignition OFF OperationThe power sunroof switches remain active for
up to approximately ten minutes after the igni-
tion switch has been turned OFF. Opening
either front door will cancel this feature. The
time is programmable. Refer to “Electronic Ve-
hicle Information Center (EVIC)/Personal Set-tings (Customer-Programmable Features)” in
“Understanding Your Instrument Panel” for fur-
ther information.
COMMANDVIEW
SUNROOF WITH
POWER SHADE — IF EQUIPPED
The CommandView sunroof switch is located
to the left between the sun visors on the over-
head console.
The power shade switch is located to the right
between the sun visors on the overhead con-
sole.
CommandView Sunroof and Power Shade
Switches
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Closing Power Shade — Manual
Mode
To close the shade, press and hold the switch
in the forward position. Any release of the
switch will stop the movement and the shade
will remain in a partially closed condition until
the switch is pushed and held forward again.
Pinch Protect FeatureThis feature will detect an obstruction in the
opening of the sunroof during Express Close
operation. If an obstruction is detected, the
sunroof will automatically retract. Remove the
obstruction if this occurs. Next, press the
switch forward and release to Express Close.
NOTE:
If three consecutive sunroof close attempts
result in Pinch Protect reversals, the fourth
close attempt will be a Manual Close move-
ment with Pinch Protect disabled.
Pinch Protect OverrideIf a known obstruction (ice, debris, etc.) pre-
vents closing the sunroof, press the switch
forward and hold for two seconds after the
reversal occurs. This allows the sunroof to
move toward the closed position.NOTE:
Pinch protection is disabled while the
switch is pressed.
Wind BuffetingWind buffeting can be described as the per-
ception of pressure on the ears or a helicopter-
type sound in the ears. Your vehicle may exhibit
wind buffeting with the windows down, or the
sunroof (if equipped) in certain open or partially
open positions. This is a normal occurrence
and can be minimized. If the buffeting occurs
with the rear windows open, open the front and
rear windows together to minimize the buffet-
ing. If the buffeting occurs with the sunroof
open, adjust the sunroof opening to minimize
the buffeting or open any window.
Sunroof MaintenanceUse only a non-abrasive cleaner and a soft
cloth to clean the glass panel.
Ignition OFF OperationThe power sunroof switches can be pro-
grammed to remain active for up to approxi-
mately ten minutes after the ignition switch has
been turned OFF. Refer to “Electronic Vehicle
Information Center (EVIC)/Customer-Program-
mable Features (System Setup)” in “Under-
standing Your Instrument Panel” for further in-
formation.
NOTE:
Opening either front door will cancel this
feature.
Sunroof Fully ClosedPress the switch forward and release to ensure
that the sunroof is fully closed.
ELECTRICAL POWER OUTLETSYour vehicle is equipped with 12 Volt (13 Amp)
power outlets that can be used to power cellu-
lar phones, small electronics and other low
powered electrical accessories. The power out-
lets are labeled with either a “key” or a “battery”
symbol to indicate how the outlet is powered.
Power outlets labeled with a “key” are powered
when the ignition switch is in the ON or ACC
position, while the outlets labeled with a “bat-
tery” are connected directly to the battery and
powered at all times.
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•Controls ............................. 196
• Replacing The Batteries .................... 197
• Unwired Stereo Headphone Lifetime
Limited Warranty ........................ 197
• Video Screen Operation .................... 198
• Playing A Disc On The VES™ ................. 198
• Shared Modes .......................... 199
• Information Mode Display ................... 199
• Mode Selection Menu ..................... 200
• Numeric Keypad Menu ..................... 201
• Disc Menu ............................ 201
• Display Settings ......................... 202
• Listening To Audio With The Screen Closed ........ 202
• Why Does The Screen Mode Change Automatically .... 202
• Auxiliary Inputs ......................... 203
• STEERING WHEEL AUDIO CONTROLS ............. 203
• Radio Operation ......................... 204
• CD Player ............................. 204
• CD/DVD DISC MAINTENANCE .................. 204
• RADIO OPERATION AND MOBILE PHONES .......... 204
155

As an added safety feature, your vehicle has
been equipped with a Tire Pressure Monitoring
System (TPMS) that illuminates a low tire pres-
sure telltale when one or more of your tires is
significantly under-inflated. Accordingly, when
the low tire pressure telltale illuminates, you
should stop and check your tires as soon as
possible, and inflate them to the proper pres-
sure. 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.
Please note that the TPMS is not a substitute for
proper tire maintenance, and it is the driver’s
responsibility to maintain correct tire pressure,
even if under-inflation has not reached the level
to trigger illumination of the TPMS low tire
pressure telltale.Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when
the system is not operating properly. The TPMS
malfunction indicator is combined with the low
tire pressure telltale. When the system detects
a malfunction, the telltale will flash for approxi-
mately one minute and then remain continu-
ously illuminated. This sequence will continue
upon subsequent vehicle start-ups as long as
the malfunction exists. When the malfunction
indicator is illuminated, the system may not be
able to detect or signal low tire pressure as
intended. TPMS malfunctions may occur for a
variety of reasons, including the installation of
replacement or alternate tires or wheels on the
vehicle that prevent the TPMS from functioning
properly. Always check the TPMS malfunction
telltale after replacing one or more tires or
wheels on your vehicle, to ensure that the
replacement or alternate tires and wheels allow
the TPMS to continue to function properly.CAUTION!
The TPMS has been optimized for the original
equipment tires and wheels. TPMS pressures
and warning have been established for the tire
size equipped on your vehicle. Undesirable
system operation or sensor damage may re-
sult when using replacement equipment that
is not of the same size, type, and/or style.
Aftermarket wheels can cause sensor dam-
age. Do not use tire sealant from a can or
balance beads if your vehicle is equipped with
a TPMS, as damage to the sensors may
result.
12. Park/Headlight ON Indicator — If
Equipped This indicator will illuminate when
the park lights or headlights are
turned on.
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•Engine Temperature Warning Light
This light warns of an overheated en-
gine condition. As temperatures rise
and the gauge approaches H,this
indicator will illuminate and a single
chime will sound after reaching a set threshold.
Further overheating will cause the temperature
gauge to pass H,a continuous chime will occur
until the engine is allowed to cool.
If the light turns on while driving, safely pull
over and stop the vehicle. If the A/C system is
on, turn it off. Also, shift the transmission into
NEUTRAL and idle the vehicle. If the tempera-
ture reading does not return to normal, turn the
engine off immediately and call for service.
Refer to “If Your Engine Overheats” in “What To
Do In Emergencies” for more information.
• Transmission Temperature Light
This light indicates that there is
excessive transmission fluid tem-
perature that might occur with se-
vere usage such as trailer towing.
It may also occur when operating
the vehicle in a high torque con-
verter slip condition, such as 4-wheel-drive
operation (e.g., snow plowing, off- road opera- tion). If this light comes on, stop the vehicle and
run the engine at idle or faster, with the trans-
mission in NEUTRAL until the light goes off.
CAUTION!
Continuous driving with the Transmission
Temperature Indicator illuminated will eventu-
ally cause severe transmission damage or
transmission failure.
WARNING!
If the Transmission Temperature Warning
Light is illuminated and you continue operat-
ing the vehicle, in some circumstances you
could cause the fluid to boil over, come in
contact with hot engine or exhaust compo-
nents and cause a fire.
Engine Oil Change Indicator System
Oil Change Due
Your vehicle is equipped with an engine oil
change indicator system. The “Oil Change
Due” message will flash in the EVIC display for
approximately 10 seconds after a single chime
has sounded, to indicate the next scheduled oil
change interval. The engine oil change indica-
tor system is duty cycle based, which means
the engine oil change interval may fluctuate,
dependent upon your personal driving style.
Unless reset, this message will continue to
display each time you turn the ignition switch to
the ON/RUN position or cycle the ignition to the
ON/RUN position if equipped with Keyless
Enter-N-Go. To turn off the message temporar-
ily, press and release the MENU button. To
reset the oil change indicator system (after
performing the scheduled maintenance) refer
to the following procedure.
Vehicles Equipped With Keyless
Enter-N-Go
1. Without pressing the brake pedal, push the
ENGINE START/STOP button and cycle the
ignition to the ON/RUN position (Do not start
the engine.)
2. Fully depress the accelerator pedal, slowly,
three times within 10 seconds.
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Pressing the center button will make the radio
switch between the various modes available
(AM/FM/SAT/CD/HDD/AUX/VES, etc.).
The left-hand control is a rocker-type switch
with a pushbutton in the center. The function of
the left-hand control is different depending on
which mode you are in.
The following describes the left-hand control
operation in each mode.
Radio OperationPressing the top of the switch will “Seek” up for
the next listenable station and pressing the
bottom of the switch will “Seek” down for the
next listenable station.
The button located in the center of the left-hand
control will tune to the next preset station that
you have programmed in the radio preset
pushbutton.
CD PlayerPressing the top of the switch once will go to
the next track on the CD. Pressing the bottom of
the switch once will go to the beginning of the
current track, or to the beginning of the previ-ous track if it is within one second after the
current track begins to play.
If you press the switch up or down twice, it
plays the second track; three times, it will play
the third, etc.
The center button on the left side rocker switch
has no function for a single-disc CD player.
However, when a multiple-disc CD player is
equipped on the vehicle, the center button will
select the next available CD in the player.
CD/DVD DISC MAINTENANCETo 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
scratching the disc.
4. Do not use solvents such as benzene, thin-
ner, cleaners, or anti-static 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 par-
ticular 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 MOBILE
PHONES
Under certain conditions, the mobile phone
being on in your vehicle can cause erratic or
noisy performance from your radio. This condi-
tion may be lessened or eliminated by relocat-
ing the mobile phone antenna. This condition is
not harmful to the radio. If your radio perfor-
mance does not satisfactorily “clear” by the
repositioning of the antenna, it is recom-
mended that the radio volume be turned down
or off during mobile phone operation when not
using Uconnect™ (if equipped).
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NOTE:
Your vehicle is capable of water fording in
up to 20 inches (51 cm) of water, while
crossing small rivers or streams. To main-
tain optimal performance of your vehicle’s
heating and ventilation system it is recom-
mended to switch the system into recircula-
tion mode during water fording.
CAUTION!
When driving through water, do not exceed
5 mph (8 km/h). Always check water depth
before entering, as a precaution, and check all
fluids afterward. Driving through water may
cause damage that may not be covered by the
New Vehicle Limited Warranty.
Driving through water more than a few inches/
centimeters deep will require extra caution to
ensure safety and prevent damage to your
vehicle. If you must drive through water, try to
determine the depth and the bottom condition
(and location of any obstacles) prior to enter-
ing. Proceed with caution and maintain a steady controlled speed less than 5 mph
(8 km/h) in deep water to minimize wave ef-
fects.
Flowing Water
If the water is swift flowing and rising (as in
storm run-off), avoid crossing until the water
level recedes and/or the flow rate is reduced. If
you must cross flowing water avoid depths in
excess of 9 inches (23 cm). The flowing water
can erode the streambed, causing your vehicle
to sink into deeper water. Determine exit
point(s) that are downstream of your entry point
to allow for drifting.
Standing Water
Avoid driving in standing water deeper than
20 inches (51 cm), and reduce speed appro-
priately to minimize wave effects. Maximum
speed in 20 inches (51 cm) of water is less than
5 mph (8 km/h).
Maintenance
After driving through deep water, inspect your
vehicle fluids and lubricants (engine oil, trans-
mission oil, axle, transfer case) to assure the
fluids have not been contaminated. Contami-
nated fluid (milky, foamy in appearance) shouldbe flushed/changed as soon as possible to
prevent component damage.
Driving In Snow, Mud And SandIn heavy snow, when pulling a load, or for
additional control at slower speeds, shift the
transmission to a low gear and shift the transfer
case to 4WD LOW if necessary. Refer to “Four-
Wheel Drive Operation” in “Starting and Oper-
ating” for further information. Do not shift to a
lower gear than necessary to maintain forward
motion. Over-revving the engine can spin the
wheels and traction will be lost.
Avoid abrupt downshifts on icy or slippery
roads, because engine braking may cause
skidding and loss of control.
Hill Climbing
NOTE:
Before attempting to climb a hill, determine
the conditions at the crest and/or on the
other side.
Before climbing a steep hill,
shift the trans-
mission to a lower gear and shift the transfer
case to 4WD LOW. Use first gear and 4WD
LOW for very steep hills.
240