FORD 2011 Edge v.2 - Manual (Page 273)

WARNING: Just prior to the system recognizing a blocked
condition and alerting the driver, the number of missed objects
will increase. To help avoid injuries, NEVER use the BLIS
௡ as a
replacement for using the side and rear view mirrors and looking over
your shoulder before changing lanes. BLIS
௡ is not a replacement for
careful driving and only an assist.
Once the blockage is removed, the system will require some driving time
and detection of at least two vehicle objects prior to resetting or the
driver can cycle the ignition key. If, however, blockage is still present
after the key cycle, the system will sense again that it is blocked after
driving in traffic.
The following table lists possible causes and actions for this message
being displayed:
The surface of the radar is dirty
or obstructed in some way Clean the fascia area in front of the
radar, either side, or remove
obstruction.
The surface of the radar is not
dirty or obstructed Drive normally in traffic for a few
minutes to allow the radar to detect
that it is no longer blocked. Note:
The vehicle must be in D (Drive)
and a few vehicles must pass so that
the BLIS
௡ can clear a blocked state.
Heavy rainfall or heavy snowfall
is interfering with the radar
signals No action required by the driver.
The system will automatically reset
to an unblocked state once the
rainfall/snowfall rate decreases or
stops. Do not use BLIS
௡ and/or CTA
in heavy rainfall or heavy snowfall.
Due to the nature of radar technology, it is possible to get a blockage
warning and not be blocked. This is rare and known as a false blockage
warning. A false blocked condition will either self clear or clear after a
key cycle.
Trailer tow false alerts
When towing a trailer, the sensors may detect the trailer thus causing a
false alert. It may be desirable to turn the BLIS
௡ off if the false alerts
become annoying.
Driving
273
2011 Edge (edg)
Owners Guide, 2nd Printing
USA (fus)