With Direct Adaptive Steering System: Description

The PFCW system will function when own vehicle is driven at speeds of approximately 5 km/h (3 MPH) and above.
The Predictive Forward Collision Warning (PFCW) System alerts the driver by the vehicle ahead detection indicator and chime when the distance between own vehicle and a vehicle in front of the vehicle ahead becomes closer.

Courtesy of NISSAN NORTH AMERICA, INC.

NOTE: The PFCW/FEB system shares the diagnosis function with ICC/DCA system.