Volvo XC90 TWIN ENGINE 2018 Owner's Manual page 337

52
Rear Collision Warning
53
The Rear Collision Warning (RCW) function
can help the driver avoid rear-end collisions from
vehicles approaching from behind.
The function is automatically activated each time
the engine is started.
The function can alert drivers of following vehi-
cles of the risk of a collision by rapidly flashing
the turn signals.
If, at a speed below 30 km/h (20 mph), the func-
tion detects that the vehicle is in danger of being
hit from behind, the seatbelt tensioners may ten-
sion the front seat belts and activate the
Whiplash Protection System safety system.
Immediately before a collision from behind, the
function may also activate the brakes in order to
reduce the forward acceleration of the vehicle
during the collision. However, the brakes will only
be applied if your vehicle is stationary. The brakes
will be immediately released if the accelerator
pedal is depressed.
Related information
• Driver support systems (p. 276)
• Rear Collision Warning limitations (p. 335)
• Whiplash Protection System (p. 46)
52 RCW: Warning of collision from the rear.
53 This function is not available on all markets.
RCW: Warning of collision from the rear.
54
54
Rear Collision Warning
In some situations, it may be difficult for Rear
Collision Warning (RCW) to warn the driver of a
collision risk.
This may be the case if:
• the vehicle approaching from the rear is
detected at a late stage
• the vehicle approaching from the rear
changes lanes at a late stage
• a trailer, bicycle holder or similar is con-
nected to the vehicle's electrical system - the
function will then be automatically deacti-
vated.
NOTE
In certain markets RCW does not warn with
the direction indicators due to local traffic
regulations – in such cases, that part of the
function is deactivated.
limitations
NOTE
The warning with direction indicators for Rear
Collision Warning is deactivated if the colli-
sion warning distance in the City Safety func-
tion is set to the lowest level "
The seat belt tensioning and braking func-
tions remain active.
Related information
• Rear Collision Warning (p. 335)
DRIVER SUPPORT
Late
".
335