Volvo V 40 Owner's Manual - 07 Driver Support

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07 Driver support

07

230

*

Option/accessory, for more information, see Introduction.

NOTE

The visual warning signal can be temporar-

ily disengaged in the event of high passen-

ger compartment temperature caused by

strong sunlight for example. If this occurs

then the warning sound is activated even if

it is deactivated in the menu system.

•

Warnings may not appear if the dis-

tance to the vehicle in front is small or

if steering wheel and pedal move-

ments are large, e.g. a very active driv-

ing style.

WARNING

Warnings and brake interventions could be

implemented late or not at all if the traffic

situation or external influences mean that

the radar or camera sensor cannot detect

a pedestrian, a vehicle or a cyclist in front

correctly.

The sensor system has a limited range for

pedestrians and cyclists

23

 - the system

can provide effective warnings and brake

interventions for them at vehicle speeds up

to 50 km/h. For stationary or slow-moving

vehicles, warnings and brake interventions

are effective at vehicle speeds up to

70 km/h.

Warnings for stationary or slow-moving

vehicles could be disengaged due to dark-

ness or poor visibility.

Warnings and brake interventions for

pedestrians and cyclists are deactivated at

vehicle speeds exceeding 80 km/h.

The collision warning system uses the same

radar sensors as the adaptive cruise control

(p. 199).

If warnings are perceived as being too fre-

quent or disturbing then the warning distance

can be reduced. This then leads to the sys-

tem providing a warning at a later stage,

which reduces the total number of warnings;

see Collision warning system - operation (p.

228).

Collision Warning with Auto Brake is tempo-

rarily deactivated with reverse gear engaged.

Collision Warning with Auto Brake is not acti-

vated at low speeds - under 4 km/h, which is

why the system does not intervene in situa-

tions where the car is approaching a vehicle

in front very slowly, e.g. when parking.

In situations where the driver demonstrates

active, aware driving behaviour, a collision

warning may be postponed slightly in order to

keep unnecessary warnings to a minimum.

When Auto Brake has prevented a collision

with a stationary object the car remains sta-

tionary for a maximum of 1.5 seconds. If the

car is braked for a vehicle in front that is mov-

ing, then speed is reduced to the same speed

as that maintained by the vehicle in front.

On a car with manual gearbox the engine

stops when Auto Brake has stopped the car,

unless the driver manages to depress the

clutch pedal beforehand.

Related information

•

Collision warning system* (p. 223)

•

Collision warning system* - function (p.

224)

•

Collision warning system* - detection of

pedestrians (p. 227)

•

Collision warning system* - cyclist detec-

tion (p. 225)

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For cyclists, the warning and full brake intervention may come very late or simultaneously.