2012 Volvo XC70 Owner's Manual - Page 174

04 Comfort and driving pleasure Collision warning with Full Auto-brake and Pedestrian Detection* capacity to avoid a collision. In these conditions, the ABS and DSTC systems provide the best possible braking effect while helping to maintain stability. WARNING NOTE If warnings are given too frequently, the warning distance can be reduced (see page 173). This causes the system to provide later warnings, which decreases the total number of warnings provided. • NOTE The visual warning signal may be temporarily disengaged in the event of high passenger compartment temperature due to strong sunlight, etc. If this occurs, the audible warning signal will be used, even if it has been deactivated in the menu system. In certain situations, the system cannot provide warnings or warnings may be delayed if traffic conditions or other external factors make it impossible for the radar sensor or camera to detect a pedestrian or a vehicle ahead. Warnings may not be provided if the distance to the vehicle ahead is short, or if movements of the steering wheel/ brake pedal are great, such as during active driving. The sensor system has a limited range for pedestrians and provides warnings and braking effect most effectively at speeds up to 30 mph (50 km/h). For stationary or slow-moving vehicles, the system functions best if your vehicle's speed is below approximately 45 mph (70 km/h). Warnings for stationary or slow-moving vehicles may not be provided in dark conditions or in poor visibility. • WARNING • 04 • The system is not activated at speeds under approx. 2 mph (4 km/h). Therefore, it will not brake your vehicle if you approach a vehicle ahead at very low speed, such as when parking. The driver's actions always have highest priority and override the Collision Warning system. This means that the system will not intervene in situations where the driver is actively steering, braking or pressing the accelerator pedal, even if a collision is imminent. When Auto-brake has prevented a collision with a stationary object, your vehicle will remain at a standstill for approx. 1.5 seconds. If your vehicle has been braked for a moving vehicle ahead, your vehicle's speed will be reduced to the same speed as that vehicle's. • • • The Collision Warning system uses the same radar sensors as Adaptive Cruise Control. For more information on the radar sensor and its limitations, see page 158. 174 * Option/accessory, for more information, see Introduction.