Trailer Stability Assist - Tsa - Volvo V40 Owner's Manual

Push in the locking wheel
anticlockwise until you hear a click.
Turn the locking wheel down fully, until it
comes to a stop. Hold it in this position
while pulling the towball rearward and
upward.
WARNING
Secure the detachable towbar safely if it is
stored in the car, see Detachable towbar -
storage (p. 302).
Push the protective cover until it snaps
and turn it
tight.
Related information
•
Detachable towbar - storage (p. 302)
•
Detachable towbar - specifications (p.
302)
•
Driving with a trailer (p. 299)
08 Starting and driving

Trailer Stability Assist - TSA

The trailer stability assist TSA (Trailer Stability
Assist) function is to stabilise the car and
trailer combination if it begins to snake.
The TSA function is part of the DSTC system
(Dynamic Stability and Traction Control), see
Stability and traction control system (DSTC)
(p. 185).
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.
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.
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