FORD 2013 Flex v.3 - Manual (Page 246)

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 the vehicle has a factory equipped tow bar, and it is towing a
trailer, the sensors will detect the trailer and turn the BLIS off to avoid
false alerts. For non-factory equipped tow bars 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.
System Errors
If either system senses a problem with the left or right sensor, the
BLIS® indicator in the information display will illuminate and remain on.
Also, BLIND SPOT SYSTEM FAULT or CROSS TRAFFIC SYSTEM
FAULT message will appear. When problems that may cause the left or
right indicator not to illuminate, only the information display message
faults appear.
Switching the Systems Off and On
One or both systems can be switched off temporarily by using the
information display control; refer to the Information Display chapter.
When the BLIS® is switched off, the driver does not receive alerts and the
information display shows BLIND SPOT SYS OFF and/or CTA SYSTEM
OFF. The system switches back on whenever the ignition is switched on.
Driving Aids 245
2013 Flex (471)
Owners Guide gf, 3rd Printing, December 2012
USA (fus)