Subaru Legacy 2015 Technicians Reference Booklet page 113

2015 Legacy and Outback
The Subaru Rear Vehicle Detection system is classified as a Short Range Radar system. Each
of the two Radar units contains a Radio Frequency (RF) antenna that emits electromagnetic
radiation in the 24 GHz frequency range. At a distance of 20cm from the sensor, the radiated
power is 0.0027 mW/cm
The detectable angle from the center of each RF antenna is 75° or 150° total with a range of
approximately 230ft (70m). Regardless if the system is using BSD, LCA, and RCTA, the RF
antennas are always monitoring a 150° angle with a range of 230ft. What differentiates BSD,
LCA, and RCTA is the logic used to estimate relative speed difference versus distance of Time to
Collision (TTC) warning.
To ensure correct operation of the SRVD system, observe the following precautions:
1. Always keep the bumper surface near the radar sensor clean
2. Do not affix any stickers of other items on the bumper surface near the radar sensors
3. Do not modify the bumper near the radar sensors
4. Do not paint the bumper near the radar sensors
5. Do not expose the bumper near the radar sensors to strong impacts. If a sensor becomes
misaligned, a system malfunction may occur, including the inability to detect vehicles
entering the detection areas
Intersection
Vertical line Vertical line
(100mm) (100mm)
Vary from 100mm to
80mm along character line
Bumper Prohibited Areas Legacy
. This is well below the human exposure protection limit of 1.0 mW/cm
2
SRVD Detection Area
Intersection
Vertical line
(150mm)
(80mm)
7-17
New Technology Training
7-16
(100mm)
Bumper Prohibited Areas Outback
113
(Module 926)
.
2
Intersection
Vertical line
(100mm)
7-18
June 2014