2007 Volvo S40 Owner's Manual - Page 129

Traction control - TC This function is designed to help reduce wheel spin by transferring power from a drive wheel that begins to lose traction to the wheel on the opposite side of the vehicle (on the same axle). TC is most active at low speeds. This is one of the stability system's permanent functions and cannot be switched off. Spin control (SC) The spin control function is designed to help prevent the drive wheels from spinning while the vehicle is accelerating. Under certain circumstances, such as when driving with snow chains, or driving in deep snow or loose sand, it may be advisable to temporarily switch off this function for maximum tractive force1 . 1 Models equipped with All Wheel Drive (AWD) have an integrated traction control function that cannot be disabled. DSTC is optional on AWD models. Temporarily switching off Spin control 1. Turn the thumbwheel (A) on the left-side steering wheel lever until the STC/DSTC menu is displayed. 2. Hold down the RESET button (B) to toggle between STC/DSTC SPIN CONTROL ON or OFF. NOTE The message STC/DSTC SPIN CONTROL OFF indicates that the stability system's spin control function has temporarily been switched off. The stability control indicator light will illuminate and remain on until spin control has been reactivated. The spin control function is automatically enabled each time the engine is started. STC/DSTC ON indicates that all system functions are active. Active yaw control - AYC (DSTC only) This function helps maintain directional stability, for example when cornering, by braking one or more of the wheels if