Volvo XC90 2018 Owner's Manual page 340

DRIVER SUPPORT
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Cause
Water or snow from the road surface swirls up and blocks the radar
signals or camera view.
Dirt has appeared between the inside of the windscreen and the cam-
era and radar unit.
Strong oncoming light
High temperature
At very high temperatures the camera and radar
unit can temporarily be switched off for
about 15 minutes after the engine is started so
as to protect the unit's electronics. The camera
and radar unit restarts automatically when the
temperature has fallen sufficiently.
Damaged windscreen
NOTE
If not rectified it can lead to reduced perform-
ance for the driver support systems that use
the camera and radar unit. This may result
functions being reduced, being switched off
completely or giving incorrect function
responses.
An authorised Volvo workshop is recommended.
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338
Action
No action. Sometimes the unit does not work on a very wet or snow-covered road
surface.
Visit a workshop to have the windscreen inside the unit's cover cleaned - an
authorised Volvo workshop is recommended.
No action. The camera unit is reset automatically in more favourable light condi-
tions.
The following is also applicable so as not to risk
incorrect or reduced function or function failure
for the driver supports that use the radar unit:
If a scratch, crack or stone chip appears on
•
the windscreen in front of any of the "win-
dows" for the camera and radar unit and cov-
ers an area of approx. 0.5 × 3.0 mm
(0.02 × 0.12 in.) or more, a workshop
be contacted so that the windscreen can be
replaced.
Volvo recommends not repairing cracks,
•
scratches or stone chips in the area in front
of the camera and radar unit – the entire
windscreen should be replaced instead.
Before replacing a windscreen, contact a
•
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workshop to verify that the correct wind-
screen has been ordered and will be fitted.
The same type of windscreen wipers or wind-
•
screen wipers approved by Volvo must be fit-
ted when the windscreen is replaced.
When replacing the windscreen, the camera
•
and radar unit must be recalibrated by a
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workshop to ensure that all the camera
and radar-based systems in the car function.
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must
Radar
Vehicle speed
The radar unit's ability to detect a vehicle ahead
is greatly reduced if the speed of the vehicle
ahead is very different to the speed of your own
car.