2013 JEEP GRAND CHEROKEE warning

Display Warnings And Maintenance
“Clean Radar Sensor In Front Of Vehicle” Warning
The ACC “Clean Radar Sensor In Front Of Vehicle”
warning will display when conditions temporarily limit
system performance. This most often occurs at times of
poor visibility, such as in snow or heavy rain. The ACC
system may also become temporarily blinded due to
obstructions, such as mud, dirt or ice. In these cases, the
EVIC will display “Clean Radar Sensor In Front Of
Vehicle” and the system will deactivate.
The “Clean Radar Sensor In Front Of Vehicle” message
can sometimes be displayed while driving in highly
reflective areas (i.e. tunnels with reflective tiles, or ice and
snow). The ACC system will recover after the vehicle has
left these areas. Under rare conditions, when the radar is
not tracking any vehicles or objects in its path this
warning may temporarily occur.NOTE:
If the ACC “Clean Radar Sensor In Front Of
Vehicle” warning is active Normal (Fixed Speed) Cruise
Control is still available. For additional information refer
to “Normal (Fixed Speed) Cruise Control Mode” in this
section.
Clean Radar Sensor Warning
240 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

Removing ACC Sensor For Off-Roading
NOTE:When off-roading, it may be advisable to remove
the ACC sensor. The sensor is located 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 attachment 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 available. The cluster will display
the warning “ACC/FCW Unavailable - Service Radar
Sensor.”
242 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

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 N·m).
ACC Unavailable Warning
If the system turns off, and the EVIC displays “ACC/
FCW Unavailable, Vehicle System Error”, there may be a
temporary malfunction that limits ACC functionality.
Although the vehicle is still drivable under normal
conditions, ACC will be temporarily unavailable. If this
occurs, try activating ACC again later, following a key
cycle. If the problem persists, see your authorized dealer.
Service ACC Warning
If the system turns off, and the EVIC displays “ACC/
FCW Unavailable Service Radar Sensor”, it indicates
there is an internal system fault. Although the vehicle is
still drivable under normal conditions, have the system
checked by an authorized dealer.
Precautions While Driving With ACC
In certain driving situations, ACC may have detection
issues. In these cases, ACC may brake late or unexpect-
edly. The driver needs to stay alert and may need to
intervene.
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UNDERSTANDING THE FEATURES OF YOUR VEHICLE 243

Normal (Fixed Speed) Cruise Control Mode
In addition to Adaptive Cruise Control mode, a normal
(fixed speed) Cruise Control mode is available for cruis-
ing at fixed speeds. The normal Cruise Control mode is
designed to maintain a set cruising speed without requir-
ing the driver to operate the accelerator. Cruise Control
can only be operated if the vehicle speed is above 20 mph
(32 km/h).
To change between the different cruise modes, press the
MODE button when the system is in either the OFF,
READY or SET state. Pressing of the MODE button in any
state will result in changing to the new Mode in the OFF
state.
WARNING!
In the normal Cruise Control mode, the system will
not react to vehicles ahead. In addition, the proximity
warning does not activate and no alarm will sound
even if you are too close to the vehicle ahead since
neither the presence of the vehicle ahead nor the
vehicle-to-vehicle distance is detected. Be sure to
maintain a safe distance between your vehicle and
the vehicle ahead. Always be aware which mode is
selected.
To Set A Desired Speed
When the vehicle reaches the speed desired, press the
SET-button and release. The EVIC will display the set
speed.
NOTE: You must observe the display when setting or
changing speed, not the speedometer.
248 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

Forward Collision Warning — If Equipped
The Forward Collision Warning (FCW) system provides
the driver with audible and visual warnings (within the
EVIC) when it detects a potential frontal collision. The
warnings are intended to provide the driver with enough
time to react and avoid the potential collision.
FCW monitors the information from the forward looking
sensor as well as the Electronic Brake Controller (EBC),
wheel speed sensors, i.e., to calculate a probable rear-end
collision. When the system determines that a rear-end
collision is probable a warning message (both audible
and visual) will be displayed on the EVIC. When the
system determines a collision with the vehicle in front of
you is no longer probable, the warning message will be
deactivated.
FCW Message
250 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

NOTE:
•The minimum speed for FCW activation is 10 mph
(16 km/h).
• When entering or driving in a curve, the FCW alerts
may be triggered on objects other than vehicles such as
guard rails or sign posts based on the course predic-
tion. This is expected and is a part of normal FCW
activation and functionality.
WARNING!
Forward Collision Warning (FCW) is not intended to
avoid a collision on its own, nor can FCW detect
every type of collision. The driver has the responsi-
bility to avoid a collision by controlling the vehicle
via braking and steering. Failure to follow this warn-
ing could lead to serious injury or death.
Changing FCW Status
The FCW feature can be set to far, set to near or turned off
in the Electronic Vehicle Information Center (EVIC) refer
to “Electronic Vehicle Information Center (EVIC)” in
“Understanding Your Instrument Panel” for further in-
formation. The FCW Status Off, Near or Far will be
displayed in the EVIC.
FCW settings can only be changed when the vehicle is in
PARK.
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UNDERSTANDING THE FEATURES OF YOUR VEHICLE 251

Changing the FCW status to “Off” prevents the system
from warning you of a possible collision with the vehicle
in front of you.NOTE:
In the “Off” setting FCW OFF will be displayed
in the EVIC.
Example Only
FCW Off Example
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UNDERSTANDING THE FEATURES OF YOUR VEHICLE 253

NOTE:
•The system will retain the last setting selected by the
driver after ignition shut down.
• FCW will not react to irrelevant objects such as over-
head objects, ground reflections, objects not in the path
of the car, stationary objects that are far away, oncom-
ing traffic, or leading vehicles with the same or higher
rate of speed.
• FCW will be disabled like ACC below with the un-
available screens.
FCW Unavailable Warning
If the system turns off, and the EVIC displays “ACC/
FCW Unavailable, Vehicle System Error”, there may be a
temporary malfunction that limits FCW functionality.
Although the vehicle is still drivable under normal
conditions, FCW will be temporarily unavailable. If this occurs, try activating FCW again later, following a key
cycle. If the problem persists, see your authorized dealer.
Service FCW Warning
If the system turns off, and the EVIC displays “ACC/
FCW Unavailable Service Radar Sensor”, it indicates
there is an internal system fault. Although the vehicle is
still drivable under normal conditions, have the system
checked by an authorized dealer.
PARKSENSE
REAR PARK ASSIST — IF
EQUIPPED
The ParkSense Rear Park Assist system provides visual
and audible indications of the distance between the rear
fascia and a detected obstacle when backing up, e.g.
during a parking maneuver. Refer to ParkSense System
Usage Precautions for limitations of this system and
recommendations.
254 UNDERSTANDING THE FEATURES OF YOUR VEHICLE