2014 Ford Flex Owner Manual Printing 1 - Page 237

236 Driving Aids Reasons for messages being displayed The radar surface is Clean the fascia area in front of the radar or dirty or obstructed remove the obstruction. The radar surface is Drive normally in traffic for a few minutes to not dirty or obstructed allow the radar to detect passing vehicles so it can clear the blocked state. Heavy rainfall/snowfall No action required. The system automatically interferes with the resets to an unblocked state once the radar signals rainfall/snowfall rate decreases or stops. Do not use BLIS® and/or CTA in these conditions. System Limitations The BLIS® and CTA systems do have their limitations; situations such as severe weather conditions or debris build-up on the sensor area may limit vehicle detection. The following are other situations that may limit the BLIS®: • Certain maneuvering of vehicles entering and exiting the blind zone. • Vehicles passing through the blind zone at very fast rates. • When several vehicles forming a convoy pass through the blind zone. The following are other situations that may limit the CTA system: • Adjacently parked vehicles or objects obstructing the sensors. • Approaching vehicles passing at speeds greater than 15 mph (24 km/h). • Driving in reverse faster than 3 mph (5 km/h). • Backing out of an angled parking spot. False Alerts Note: If you connected a trailer to your vehicle the BLIS® system may detect the trailer causing a false alert. To avoid false alerts you may want to turn the BLIS off manually. There may be certain instances when either the BLIS® or CTA systems illuminate the alert indicator with no vehicle in the coverage zone; this is known as a false alert. Some amount of false alerts are normal; they are temporary and self-correct. 2014 Flex (471) Owners Guide gf, 1st Printing, April 2013 USA (fus)