2011 Volvo S80 Owner's Manual - Page 165

04 Comfort and driving pleasure Adaptive Cruise Control (ACC)* Standby mode due to action by the driver ACC is temporarily deactivated and put in standby mode: • the vehicle's speed falls below 20 mph (30 km/h) WARNING Accessories or other objects, such as extra headlights, must not be installed in front of the grille. Modification of the radar sensor could make its use illegal. • when the brakes are applied • if the gear selector is moved to N • if the accelerator pedal is depressed for more than 1 minute. the wheels lose traction brake temperature is high engine speed (rpm) is too low or too high the radar sensor is obstructed by, for example, wet snow or rain. NOTE If the accelerator pedal is only depressed for a short time, such as when passing another vehicle, ACC is deactivated temporarily and is reactivated when the pedal is released. Turning ACC off completely A short press on in standby mode or a long press in active mode turns ACC off completely. The set speed and time interval are then cleared from the system's memory and cannot . be resumed by pressing The radar sensor's capacity to detect vehicles ahead is impeded: • if the radar sensor is obstructed and cannot detect other vehicles, for example in heavy rain, or if snow or other objects are obscuring the radar sensor. 04 Automatic standby mode Adaptive cruise control is linked to other systems such as the stability and traction control system (DSTC). If this system is not functioning properly, adaptive cruise control is automatically deactivated and will go into standby mode. In the event of automatic deactivation, an audible signal will sound and the message Cruise control Cancelled is shown in the display. The driver must then intervene and adapt the vehicle's speed to the surrounding traffic and regulate the distance to the vehicle ahead. An automatic switch to standby mode may be caused if: NOTE The radar sensor and its limitations In addition to being used by ACC, the radar sensor is also used by Distance Alert (see page 170) and Collision Warning with Autobrake (see page 173). This sensor is designed to detect cars or larger vehicles driving in the same direction as your vehicle, in the same lane. Keep the area in front of the radar sensor clean. • if the speed of vehicles ahead is significantly different from your own speed. `` * Option/accessory, for more information, see Introduction. 165