Refit the protective cover by wedging the
cover's hooks into the bumper's rear
edge. Push the cover upward until the
bolts are in the correct position
Finally, turn the bolts a quarter turn
that the cover is attached. It is important
that the handle of the bolts is set trans-
versely during assembly.
Related information
•
Detachable towbar* - storage (p. 305)
•
Detachable towbar* - specifications
(p. 306)
•
Driving with a trailer* (p. 303)
18
Included in the installation of Volvo genuine towbar.
(Electronic Stability Control) - Electronic stability control.
19
Trailer Stability Assist - TSA
The trailer stability assist TSA (Trailer Stability
Assist) function is designed to stabilise the car
and trailer combination if it begins to snake.
TSA- the function is included in the stability
system (p. 190) ESC
Function
The snaking phenomenon can occur with any
car/trailer combination. Snaking normally
occurs at high speeds. But, there is a risk of it
occurring at lower speeds (70-90 km/h) if the
trailer is overloaded or the load is improperly
.
distributed, e.g. too far back.
so
In order for snaking to occur, there must be a
triggering factor, e.g.:
•
Car with trailer subjected to a sudden and
powerful side wind.
•
Car with trailer drives on an uneven road
surface or in a pothole.
•
Sweeping steering wheel movements.
Operation
If snaking has started, it could be difficult or
even impossible to suppress. This makes the
car/trailer combination difficult to control and
there is a risk that you could, for example,
end up in the wrong lane or leave the car-
riageway.
18
The trailer stability assist function continually
monitors car movements, particularly lateral
movements. If snaking is detected, the front
wheels are individually braked. This serves to
stabilise the car/trailer combination. This is
often enough to help the driver regain control
19
.
of the car.
If snaking is not eliminated the first time the
TSA system comes into action, the car/trailer
combination is braked with all wheels and
engine power is reduced. Once snaking has
been gradually suppressed and the car/trailer
combination is stable once again, the system
stops regulating and the driver once again
has full control of the car. For more informa-
tion, see Electronic stability control (ESC) -
operation (p. 191).
Miscellaneous
TSA can engage within the speed range
60-160 km/h.
TSA may fail to engage if the driver uses sud-
den steering wheel movements to try to rec-
tify the snaking because, in such a situation,
the system cannot determine whether it is the
*
Option/accessory, for more information, see Introduction.
08 Starting and driving
NOTE
TSA function is switched off if the driver
selects
Sport
mode, see Electronic stabil-
ity control (ESC) - general (p. 190).
08
}}
309