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07 Driver support
07
236
* Option/accessory, for more information, see Introduction.
The camera sensors have limitations similar
to the human eye, i.e. they "see" worse in
darkness, heavy snowfall or rain and in thick
fog for example. Under such conditions the
functions of camera-dependent systems
could be significantly reduced or temporarily
disengaged.
Strong oncoming light, reflections in the car-
riageway, snow or ice on the road surface,
dirty road surfaces or unclear lane markings
could also significantly reduce camera sensor
function when it is used to scan the carriage-
way and detect pedestrians and other vehi-
cles.
The field of vision of the camera sensor is lim-
ited, which is why pedestrians, cyclists and
vehicles cannot be detected in some situa-
tions, or they are detected later than anticipa-
ted.
During very high temperatures the camera is
temporarily switched off for about 15 minutes
after the engine is started in order to protect
camera functionality.
Fault tracing and action
If the display shows the message
Windscreen sensors blocked See manual
then this means that the camera sensor is
blocked and cannot detect pedestrians,
cyclists, vehicles or road markings in front of
the car.
At the same time, this means that - besides
Collision Warning with Auto Brake - the fol-
lowing functions will not have full functionality
either:
•
Active main beam
•
Driver Alert Control
•
Lane Keeping Aid
•
Road sign information
The following table presents possible causes
for a message being shown along with the
appropriate action.
Cause Action
The windscreen
surface in front of
the camera is dirty
or covered with ice
or snow.
Clean the wind-
screen surface in
front of the camera
from dirt, ice and
snow.
Thick fog, heavy
rain or snow means
that the camera
does not work suffi-
ciently well.
No action. At times
the camera does
not work during
heavy rain or snow-
fall.
Cause Action
The windscreen
surface in front of
the camera has
been cleaned but
the message
remains.
Wait. It may take
several minutes for
the camera to
measure the visibil-
ity.
Dirt has appeared
between the inside
of the windscreen
and the camera.
Visit a workshop to
have the wind-
screen inside the
camera cover
cleaned - an author-
ised Volvo work-
shop is recom-
mended.
Related information
•
Collision warning system* (p. 229)
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