Hyundai Santa Fe: Rear Corner Radar System / Description and operation

Hyundai Santa Fe (TM) 2019-2024 Service Manual / Advanced Driver Assistance System (ADAS) / Rear Corner Radar System / Description and operation

Description

Rear Corner Radar is a system that measures the relative speed and distance from the following vehicles by using two electromagnetic wave radar sensors attached to the rear bumper, and detects any vehicle within the blind spot zone and gives off alarm.

System Interface

System Function

•	Blind-Spot Collision Warning (BCW) Audible warning and signal on the mirror when sensing a vehicle in the blind spot area or when the vehicle is approaching at a high speed.

•	Rear Cross-Traffic Collision-Avoidance Assist (RCCA) Warns the driver when it senses a vehicle approaching from the rear outer range while vehicle is in reverse (R) position. Collision avoidance assistance applies the brakes in the event of a collision risk.

•	BCA(Blind-Spot Collision-Avoidance Assist) : When the lane departure, BCA generates avoidance for another vehicle within the blind spot zone.

•	SEA (Safe Exit Assist) : When getting off the vehicle, SEA generates alarm to alert another vehicle approaching from the rear.

Warning Condition

Blind-Spot Collision Warning (BCW)

Conditions for BCW warning ON

① The entire body of the target vehicle is located behind the line A.

② Any part of the target vehicle pass the line B.

③ Any part of the target vehicle passes the line D and Hysteresis In.

④ The entire part of the target vehicle passes the line E and Hysteresis In.

Conditions for BCW warning OFF

① The entire body of the target vehicle moves before the line A.

② The entire body of the target vehicle moves behind the line B.

③ The entire body of the target vehicle passes the line D and Hysteresis Out.

④ The entire part of the target vehicle passes the line E and Hysteresis Out.

Conditions for LCA warning ON

① The entire body of the target vehicle is located behind the line B.

② Any part of the target vehicle pass the line C.

③ Any part of the target vehicle passes the line D and Hysteresis In.

④ The entire part of the target vehicle passes the line E and Hysteresis In.

⑤ In the all above condition, TTC(Time to Collision) is not less than 4.5 sec.

Conditions for LCA warning OFF

① The entire body of the target vehicle is located before the line B.

② The entire body of the target vehicle pass the line C.

③ The entire body of the target vehicle passes the line D and Hysteresis Out.

④ The entire body of the target vehicle passes the line E and Hysteresis Out.

⑤ In the all above condition, TTC(Time to Collision) is more than 4.5 sec.

5.	Sensor activation conditions ① BCW & LCA switch (indicated by the switch LED) is on. ② Vehicle Speed: 30 km/h or faster ③ Curvature radius: 100m or more ④ Relative car speed: -10 - 255km/h ("-" means overtaking the preceding vehicle)

6.	Sensor deactivation conditions ① BCW & LCA switch (indicated by the switch LED) is off. ② Vehicle Speed: 27 km/h or slower ③ Curvature radius: 70m or less ④ Relative car speed: All except -10 - 255km/h ("-" means overtaking the preceding vehicle)

System control prohibition

① The radar is covered by debris: System conditions - Blockage message is outputted

If the sensor on the rear bumper is contaminated by snow, mud or stickers, its detecting performance may be lowered.

② The radar installation is damaged by an outside shock: Send the error code

③ BCW & LCA system fails: Send the error code

④ The radar is overheated: System conditions - Over Temperature message is outputted.

BCA-R (Blind-Spot Collision-Avoidance Assist System - Rear)

Item	Control value	Remarks
Activation speed	60 - 180 km/h	Same front camera operation condition

BCW activation condition

(1)	BCW on/off switch : On (indicated by the switch LED)

(2)	Vehicle Speed : 30 - 255 km/h (20 - 158 mile/h)

(3)	Relative vehicle speed : -10 to 255 km/h (-6 to 158 mile/h) (Negative value refers to the distance of the vehicle ahead.)

10.	Warning zone A to B : Blind spot zone B to C : Closing vehicle zone

Rear Cross-Traffic Collision Warning System (RCCW)

Rear Cross-Traffic Collision Warning System (RCCW) activation condition

Item	Control value	Remarks
Activation speed	0 to -10 km/h (Reverse)	Activate when the gear is shifted to R (Reverse) position
Time To Collision	8 km/h - 60 km/h	+ : closing
Activation distance	0.5m - 25m	Vehicle basis

① Generates warning in case of collision risk with the vehicle approaching from left and right side of your vehicle while reversing out of the parking space.

② Based on the Time To Collision (TTC), the warning is generated for the vehicle that is possible to collide within 3.5 seconds.

•	"Time To Collision (TTC): Time calculated using the relative distance/speed which is the time until the possible collision. (TTC is subject to change depending on the relative speed of the approaching vehicle)."

③ Warning zone is as follows: