Distance Sensor

WARNING: This page is about a different car, the 2016 Nissan Rogue. However, it is still accessible from the selected car via links, so may be relevant.

Distance sensor is installed to the back of the front bumper and detects a vehicle ahead by using millimeter waves.

Fig 1: Distance Sensor
Courtesy of NISSAN NORTH AMERICA, INC.
Distance sensor detects radar reflected from a vehicle ahead by irradiating radar forward and calculates a distance from the vehicle ahead and relative speed, based on the detected signal.
Distance sensor transmits the presence/absence of vehicle ahead and the distance from the vehicle ahead to the ADAS control unit via CAN communication.