System Description: Description

WARNING: This page is about a different car, the 2017 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

The PFCW system will function when own vehicle is driven at speeds of approximately 3 MPH (5 km/h) 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 system.