2012 JEEP GRAND CHEROKEE sensor

“Electronic Vehicle Information Center (EVIC)” in “Un-
derstanding Your Instrument Panel” for further informa-
tion. When the shift lever is moved to REVERSE and the
system is disabled, the EVIC will display the “PARK
ASSIST SYSTEM OFF” message for as long as the vehicle
is in REVERSE.
The ParkSenseswitch LED will be ON when
ParkSense is disabled or defective. The ParkSense 
switch LED will be OFF when the system is enabled.
Service The ParkSense Rear Park Assist System
When the ParkSenseRear Park Assist System is mal-
functioning, the instrument cluster will actuate a single
chime, once per ignition cycle, and it will display the
“CLEAN PARK ASSIST SENSORS” or the “SERVICE
PARK ASSIST SYSTEM” message. Refer to “Electronic
Vehicle Information Center (EVIC)” in “Understanding
Your Instrument Panel” for further information. When
the shift lever is moved to REVERSE and the system has detected a faulted condition, the EVIC will display the
“CLEAN PARK ASSIST SENSORS” or the “SERVICE
PARK ASSIST SYSTEM” message for as long as the
vehicle is in REVERSE. Under this condition, ParkSense
will not operate.
If “CLEAN PARK ASSIST SENSORS” appears in the
Electronic Vehicle Information Center (EVIC) make sure
the rear fascia/bumper is clean and clear of snow, ice,
mud, dirt or other obstruction and then cycle the ignition.
If the message continues to appear see an authorized
dealer.
If “SERVICE PARK ASSIST SYSTEM” appears in the
EVIC, see an authorized dealer.
Cleaning The ParkSense
System
Clean the ParkSense sensors with water, car wash soap
and a soft cloth. Do not use rough or hard cloths. Do not
scratch or poke the sensors. Otherwise, you could dam-
age the sensors.
234 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

ParkSenseSystem Usage Precautions
NOTE:
•Ensure that the rear bumper is free of snow, ice, mud,
dirt and debris to keep the ParkSense system operat-
ing properly.
•Jackhammers, large trucks, and other vibrations could
affect the performance of ParkSense.
•When you turn ParkSense off, the instrument cluster
will display “PARK ASSIST SYSTEM OFF.” Further-
more, once you turn ParkSense off, it remains off
until you turn it on again, even if you cycle the ignition
key.
•When you move the shift lever to the REVERSE
position and ParkSense is turned off, the EVIC will
display “PARK ASSIST SYSTEM OFF” message for as
long as the vehicle is in REVERSE.
•ParkSense, when on, will MUTE the radio when it is
sounding a tone.
•Clean the ParkSense sensors regularly, taking care
not to scratch or damage them. The sensors must not
be covered with ice, snow, slush, mud, dirt or debris.
Failure to do so can result in the system not working
properly. The ParkSense system might not detect an
obstacle behind the fascia/bumper, or it could provide
a false indication that an obstacle is behind the fascia/
bumper.
•Objects such as bicycle carriers, trailer hitches, etc.,
must not be placed within 12 in (30 cm) from the rear
fascia/bumper while driving the vehicle. Failure to do
so can result in the system misinterpreting a close
object as a sensor problem, causing the “SERVICE
PARK ASSIST SYSTEM” message to be displayed in
the EVIC.
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UNDERSTANDING THE FEATURES OF YOUR VEHICLE 235

•On vehicles equipped with a tailgate, ParkSense
should be disabled when the tailgate is in the lowered
or open position and the vehicle is in REVERSE. A
lowered tailgate could provide a false indication that
an obstacle is behind the vehicle.
CAUTION!
•ParkSense is only a parking aid and it is unable
to recognize every obstacle, including small ob-
stacles. Parking curbs might be temporarily de-
tected or not detected at all. Obstacles located
above or below the sensors will not be detected
when they are in close proximity.
•The vehicle must be driven slowly when using
ParkSense in order to be able to stop in time
when an obstacle is detected. It is recommended
that the driver looks over his/her shoulder when
using ParkSense.
WARNING!
•Drivers must be careful when backing up even
when using the ParkSense Rear Park Assist Sys-
tem. Always check carefully behind your vehicle,
look behind you, and be sure to check for pedes-
trians, animals, other vehicles, obstructions, and
blind spots before backing up. You are responsible
for safety and must continue to pay attention to
your surroundings. Failure to do so can result in
serious injury or death.
(Continued)
236 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

WARNING! (Continued)
•Before using the ParkSenseRear Park Assist
System, it is strongly recommended that the ball
mount and hitch ball assembly is disconnected
from the vehicle when the vehicle is not used for
towing. Failure to do so can result in injury or
damage to vehicles or obstacles because the hitch
ball will be much closer to the obstacle than the
rear fascia when the warning display turns on the
single flashing arc and sounds the continuous
tone. Also, the sensors could detect the ball mount
and hitch ball assembly, depending on its size and
shape, giving a false indication that an obstacle is
behind the vehicle.
PARKVIEW REAR BACK UP CAMERA — IF
EQUIPPED
Your vehicle may be equipped with the ParkView Rear
Back Up Camera that allows you to see an on-screen
image of the rear surroundings of your vehicle whenever
the shift lever is put into REVERSE. The image will be
displayed on the Navigation/Multimedia radio display
screen along with a caution note to “check entire sur-
roundings” across the top of the screen. After five sec-
onds this note will disappear. The ParkView camera is
located on the rear of the vehicle above the rear License
plate.
When the vehicle is shifted out of REVERSE, the rear
camera mode is exited and the navigation or audio screen
appears again.
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UNDERSTANDING THE FEATURES OF YOUR VEHICLE 237

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
approximately one minute and then remain continuously
illuminated. This sequence will continue upon subse-
quent vehicle start-ups as long as the malfunction exists.
When the malfunction indicator is illuminated, the sys-
tem 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 theTPMS 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 opera-
tion or sensor damage may result when using re-
placement equipment that is not of the same size,
type, and/or style. Aftermarket wheels can cause
sensor damage. 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.4
UNDERSTANDING YOUR INSTRUMENT PANEL 289

•Liftglass Open
•Left Front Turn Signal Lamp Out
•Right Front Turn Signal Lamp Out
•Left Rear Turn Signal Lamp Out
•Right Rear Turn Signal Lamp Out
•Low Tire Pressure
•Esc System Off
•Service Blind Spot System
•Blind Spot Detection Unavailable
•Blind Spot System Off
•Blind Spot System Unavailable Sensor Blocked
•Normal Cruise Ready — When Adaptive Cruise Con-
trol (ACC) system is turned off and Normal (Fixed
Speed) Cruise Control mode is available. Refer to“Adaptive Cruise Control (ACC)” in “Understanding
The Features Of Your Vehicle” (if equipped).
•Adaptive Cruise Off — When the Adaptive Cruise
Control (ACC) system is turned off. Refer to “Adap-
tive Cruise Control (ACC)” in “Understanding The
Features Of Your Vehicle” (if equipped).
•ACC Ready — When the ACC system is activated.
Refer to “Adaptive Cruise Control (ACC)” in “Under-
standing The Features Of Your Vehicle” (if equipped).
•ACC Set — After setting the desired speed in the ACC
system. Refer to “Adaptive Cruise Control (ACC)” in
“Understanding The Features Of Your Vehicle” (if
equipped).
•ACC Cancelled — To disable the ACC system. Refer to
“Adaptive Cruise Control (ACC)” in “Understanding
The Features Of Your Vehicle” (if equipped).
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UNDERSTANDING YOUR INSTRUMENT PANEL 299

•Sensed Vehicle Indicator — The system detects a
slower moving vehicle in the same lane. Refer to
“Adaptive Cruise Control (ACC)” in “Understanding
The Features Of Your Vehicle” (if equipped).
•Driver Override — If you apply the accelerator after
setting the desired speed in the ACC system. Refer to
“Adaptive Cruise Control (ACC)” in “Understanding
The Features Of Your Vehicle” (if equipped).
•Distance Set — After changing the desired following
distance in the ACC system, this message will display
momentarily. Refer to “Adaptive Cruise Control
(ACC)” in “Understanding The Features Of Your
Vehicle” (if equipped).
•Brake — If the ACC system predicts that its maximum
braking level is not sufficient to maintain the set
distance, this message will flash and a chime will
sound while ACC continues to apply its maximumbraking capacity. When this occurs, you should imme-
diately apply the brakes as needed to maintain a safe
distance from the vehicle ahead. Refer to “Adaptive
Cruise Control (ACC)” in “Understanding The Fea-
tures Of Your Vehicle” (if equipped).
•Clean Radar Sensor In The Front Of Vehicle — If the
ACC system deactivates due to performance limiting
conditions. Refer to “Adaptive Cruise Control (ACC)”
in “Understanding The Features Of Your Vehicle” (if
equipped).
•ACC/FCW Unavailable Vehicle System Error — If the
ACC system turns off due to a temporary malfunction
that limits functionality. Refer to “Adaptive Cruise
Control (ACC)” in “Understanding The Features Of
Your Vehicle” (if equipped).
•ACC/FCW Unavailable Service Radar Sensor — If the
ACC system turns off due to an internal system fault
that requires service from an authorized dealer. Refer
300 UNDERSTANDING YOUR INSTRUMENT PANEL

metallic objects) until the CAL indicator displayed in the
EVIC turns off. The compass will now function normally.
NOTE:A good calibration requires a level surface and
an environment free from large metallic objects such as
buildings, bridges, underground cables, railroad tracks,
etc.
Compass Variance
Compass Variance is the difference between Magnetic
North and Geographic North. To compensate for the
differences the variance should be set for the zone where
the vehicle is driven, per the zone map. Once properly
set, the compass will automatically compensate for the
differences, and provide the most accurate compass
heading. For the most accurate compass performance, the
compass must be set using the following steps.
NOTE: Keep magnetic materials away from the top of
the instrument panel, such as iPod’s, Mobile Phones,
Laptops and Radar Detectors. This is where the compass module is located, and it can cause interference with the
compass sensor, and it may give false readings.
1. Turn the ignition switch ON.
2. Press the UP or DOWN button until the Setup
(Customer-Programmable Features) menu is reached,
then press the SELECT button.
Compass Variance Map
318 UNDERSTANDING YOUR INSTRUMENT PANEL