2011 Volvo S80 Owner's Manual - Page 156

04 Comfort and driving pleasure Stability system Introduction The Dynamic Stability and Traction Control system (DSTC) consists of a number of functions designed help reduce wheel spin, counteract skidding, and to generally help improve directional stability. 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 force. Temporarily switching off Spin control 1. Turn the thumbwheel (1) until the DSTC menu is shown. 2. Hold down the RESET button (2) to toggle between DSTC SPIN CONTROL ON/ OFF. CAUTION A pulsating sound will be audible when the system is actively operating and is normal. 04 Symbols in the instrument panel If the symbols and are displayed at the same time, read the message in the information display. If the symbol appear as follows: appears alone, it may WARNING 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 DSTC's permanent functions and cannot be switched off. The car's handling and stability characteristics will be altered if the spin control function has been disabled. • If the symbol flashes, this indicates that the Operation stability system is actively functioning to help counteract wheel spin and/or a skid. • If the symbol remains on for approximately 2 seconds after the engine has been started, this indicates that the system is performing a self-diagnostic test. Active Yaw Control (AYC) This function helps maintain directional stability, for example when cornering, by braking one or more of the wheels if the vehicle shows a tendency to skid or slide laterally. This is one of DSTC's permanent functions and cannot be switched off. G021409 WARNING The stability system is intended to help improve driving safety. It supplements, but can never replace, the driver's judgment and responsibility when operating the vehicle. Speed and driving style should always be adapted to traffic and road conditions. 156