Volvo S40 S Owner's Manual download pdf (Page 118)

117

Starting and driving

Stability system

When the system is in action, it may seem like

the car does not respond normally to acceler-

ation. This is because the system detects the

amount of friction on the road surface and

allows the different stability system functions

to operate.

The car is either equipped with the stability

and traction control system (STC) – or the

dynamic stability and traction control system

(DSTC).

Traction Control – (TC)

The Traction Control function transfers

power from the spinning drive wheel to the

drive wheel which has grip by braking the

spinning drive wheel. To increase forward

traction in this situation, it may be necessary

to depress the accelerator more than usual. A

pulsing sound is heard when Traction Control

is working. This is completely normal. The TC

function is most active at low speeds. It

cannot be deactivated.

Spin Control – (SC)

The Stability Control function prevents the

drive wheels from slipping during acceler-

ation. This improves road safety on slippery

surfaces. Under certain conditions, such as

when driving with snow chains or in deep

snow or sand, it may be beneficial to

deactivate the SC function to increase

traction. This is done with the STC/DSTC

button.

Active Yaw Control – (AYC)

The Active Yaw Control function automati-

cally brakes one or more wheels to stabilise

the car in the event of a skid. If the brake

pedal were to be depressed in this situation,

it would feel more rigid than usual and a

pulsing sound would be heard.

The AYC function is always active and cannot

be deactivated.

STC/DSTC button

The STC/DSTC button in the centre console

is used to suppress or reactivate the system.

When the LED in the button is lit, the system

is active. The LED in the button goes out

when the stability system has been

suppressed. Other functions are not

affected.

NOTE! To suppress the STC or DSTC

function, the button must be pressed and

held for at least half a second. The LED in the

button goes out and STC/DSTC SPIN

CONTROL OFF appears on the information

display. The system is automatically activated

every time the engine is started.

Function/

system

STC

DSTC

1

1. Option on certain markets.

TC X X

SC X X

AYC X

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