Volvo V70 Owner's Manual page 171

Sometimes the radar sensor is late at
detecting vehicles at close distances, e.g.
a vehicle that drives in between the car
and vehicles in front.
Small vehicles, such as motorcycles, or
vehicles not driving in the centre of the
lane can remain undetected.
In bends the radar sensor may detect the
wrong vehicle or lose a detected vehicle
from view.
Cause
The radar surface in the grille is dirty or covered with ice or snow.
Heavy rain or snow blocking the radar signals.
Water or snow from the road surface swirls up and blocks the
radar signals.
The radar surface has been cleaned but the message remains.
Symbols and messages
Symbol Message
The symbol is GREEN
The symbol is WHITE
Fault tracing and action
If the combined instrument panel shows the
Radar blocked See manual
message
means that the radar signals from the radar
sensor are blocked and that vehicles in front
of the car cannot be detected.
In turn this means that - apart from Adaptive
Cruise Control - Distance Warning and Colli-
Action
Clean the radar surface in the grille from dirt, ice and snow.
No action. Sometimes the radar does not work during heavy rain or snowfall.
No action. Sometimes the radar does not work on a very wet or snowy road
surface.
Wait. It could take several minutes for the radar to sense that it is no longer
blocked.
Specification
The car maintains the stored speed.
The Adaptive cruise control is set in standby mode.
04 Driver support
Adaptive cruise control*
sion Warning with Auto Brake functions are
not operating either.
this
The following table presents examples of
possible causes for a message being shown
along with the appropriate action.
*
Option/accessory, for more information, see Introduction.
04
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