Jeep Grand Cherokee 2015, Operating Information Manual, Page: 115 / 878

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If the sensor or front end of the vehicle is
damaged due to a collision, see your autho-
rized 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 “ACC/FCW Unavailable Wipe Front
Radar Sensor” message occurs fre-
quently (e.g. more than once on every
trip) without any snow, rain, mud, or other
obstruction, have the radar sensor re-
aligned 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/FCW
operation.
“Clean Front Windshield” Warning
The “ACC/FCW Limited Functionality Clean Front
Windshield” warning will display and also a chime
will indicate when conditions temporarily limit sys-
tem performance. This most often occurs at times
of poor visibility, such as in snow or heavy rain
and fog. The ACC system may also become
temporarily blinded due to obstructions, such as
mud, dirt, or ice on windshield and fog on the
inside of glass. In these cases, the EVIC/DID will
display “ACC/FCW Limited Functionality Clean
Front Windshield” and the system will have de-
graded performance.
The “ACC/FCW Limited Functionality Clean
Front Windshield” message can sometimes be
displayed while driving in adverse weather con-
ditions. The ACC/FCW system will recover after
the vehicle has left these areas. Under rare
conditions, when the camera is not tracking any
vehicles or objects in its path this warning may
temporarily occur.
If weather conditions are not a factor, the driver
should examine the windshield and the camera
located on the back side of the inside rear view
mirror. They may require cleaning or removal of
an obstruction.
When the condition that created limited func-
tionality is no longer present, the system will
return to full functionality.
NOTE:
If the “ACC/FCW Limited Functionality
Clean Front Windshield” message occurs
frequently (e.g. more than once on every
trip) without any snow, rain, mud, or other
obstruction, have the windshield and for-
ward facing camera inspected at your autho-
rized dealer.
Service ACC/FCW Warning
If the system turns off, and the EVIC/DID dis-
plays “ACC/FCW Unavailable Service Re-
quired” or “Cruise/FCW Unavailable Service
Required”, there may be an internal system
fault or a temporary malfunction that limits ACC
functionality. Although the vehicle is still drivable
under normal conditions, ACC will be temporar-
ily unavailable. If this occurs, try activating ACC
again later, following a key cycle. If the problem
persists, see your authorized dealer.
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