Lincoln MKZ 2017 Owner's Manual page 237

The system uses radar sensors that are
located behind the bumper fascia on each
side of your vehicle. Any dirt, mud and snow
in front of the sensors and/or driving in heavy
rain can cause system degradation. Also,
other types of obstructions in front of the
sensor can cause system degradation. This
is referred to as a 'blocked' condition.
Note: Do not apply bumper stickers and/or
repair compound to these areas, this can
cause degraded system performance.
If the system detects a degraded
performance condition, a message warning
of a blocked sensor will appear in the
information display. Also the BLIS alert
indicators will remain ON and BLIS will no
longer provide any vehicle warnings. You
can clear the information display warning but
the alert indicators will remain illuminated.
MKZ (CC9) Canada/United States of America, enUSA, Edition date: 201602, Second Printing
Driving Aids
A "blocked" condition can be cleared in two
ways:
• After the blockage in front of the sensors
is removed or the rainfall/snowfall rate
decreases or stops, drive for a few
minutes in traffic to allow the sensors to
detect passing vehicles.
• By cycling the ignition from ON to OFF
and then back ON.
Note: If your vehicle has a tow bar with a
factory equipped trailer tow module and it
is towing a trailer, the sensors will
automatically turn the Blind Spot Information
System off. If your vehicle has a tow bar but
no factory equipped trailer tow module, it is
recommended to turn the Blind Spot
Information System off manually. Operating
the Blind Spot Information System with a
trailer attached will cause poor system
performance.
234
System Errors
If the system senses a problem with the left
or right sensor, the telltale will illuminate and
a message will appear in the information
display. See Information Messages (page
114).
Switching the System Off and On
You can temporarily switch the Blind Spot
Information System off in the information
display. See General Information (page 108).
When the Blind Spot Information System
switches off, you will not receive alerts and
the information display shows a system off
message. The telltale in the cluster also
illuminates. When you switch the Blind Spot
Information System on or off, the alert
indicators flash twice.
Note: The Blind Spot Information System
remembers the last selected on or off setting.
You can also have the Blind Spot Information
System switched off permanently at an
authorized dealer. Once switched off
permanently, the system can only be
switched back on at an authorized dealer.