Hyundai Santa Fe (TM): Rear Corner Radar System

Hyundai Santa Fe TM 2019-2023 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:

Blind-Spot Collision-Avoidance Assist System (BCA)

Blind-Spot Collision-Avoidance Assist System (BCA ) activation condition

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

Components and components location

Components

1. Rear corner radar unit
2. Speaker (Cluster)

3. Warning indicator

Troubleshooting

Diagnosis with Diagnostic tool

In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (Diagnostic tool).

The diagnostic system (Diagnostic tool) provides the following information.

(1)	Fault Code Searching : Checking failure and code number (DTC)

(2)	Data Analysis : Checking the system input/output data state

(3)	Actuation test : Checking the system operation condition

(4)	S/W Management : Controlling other features including system option setting and zero point adjustment

2.	Connect the cable of Diagnostic tool to the data link connector in driver side crash pad lower panel, and turn on the Diagnostic tool.

3.	If diagnose the vehicle by Diagnostic tool, select "DTC Analysis" and "Vehicle".

4.	If check current status, select the "Data Analysis" .

5.	Select "BCW", if you want to check current data of BCW system.

6.	If you want to check each module operation forcefully, select "Actuation test".

Rear Corner Radar Unit. Specifications

Specifications

[BCW, BCA]

Items	Blind-Spot Collision Warning (BCW)	Blind-Spot Collision- Avoidance Assist (BCA)	Blind-Spot Collision- Avoidance Assist (BCA)
			※Parallel Exit
Rated voltage	DC 12V
Operating voltage	9V ~ 16V
Operating speed	20 ㎞/h ~ 255 ㎞/h	60 ㎞/h ~ 200 ㎞/h	0 ㎞/h ~ 3 ㎞/h
Sensible distance	70m		80m
Frequency	24 GHz
Numbers	2 EA

[RCCW, RCCA]

Items	Rear Cross-Traffic Collision Warning System (RCCW)	Rear Cross-Traffic Collision- Avoidance Assist (RCCA)
Rated voltage	DC 12V
Operating voltage	9V ~ 16V
Operating speed	0 km/h ~ 10 km/h	0.1 km/h ~ 10 km/h
Sensible distance	25m
Curvature radius	-
Frequency	24 GHz
Numbers	2 EA

[SEA]

Items	Safe Exit Assist (SEA)
Rated voltage	DC 12V
Operating voltage	9V ~ 16V
Operating speed	0 km/h ~ 3 km/h
Sensible distance	30m
Curvature radius	-
Frequency	24 GHz
Numbers	2 EA

Rear Corner Radar Unit. Schematic diagrams

Connector and Terminal Function

[Connector Funtion]

Rear Corner Radar Unit. Repair procedures

Removal

1.	Disconnect the negative (-) battery terminal.

2.	Remove the rear bumper cover. (Refer to Body - "Rear Bumper Cover")

3.	Disconnect the rear corner radar connector (A).

Loosen the mounting nuts and remove the rear corner radar unit (A)

•	Be careful not to damage the bracket when removing the rear corner radar unit.

5.	When replacing the bracket, push the unit (A) in the direction of the arrow to remove the bracket.

Installation

Install the rear corner radar unit and bracket.

Tightening torque :

9.0 - 10.5 N.m (0.92 - 1.07 kgf.m, 6.7 - 7.7 lb-ft)

2.	install the rear bumper cover.

Connect the negative (-) battery terminal.

•	Take care not to confuse left side (master) and right side (slave) unit when installing.

4.	Perform "Correcting the Rear Corner Radar Unit Angle" procedures.

5.	Perform "Rear Corner Radar Calibration" procedures.

Warning Indicator. Components and components location

Components

1. BCW Indicator
2. Side repeater lamp

3. SVM Camera

Warning Indicator. Repair procedures

Inspection

1.	Disconnect the negative (-) battery terminal.

2.	Remove the front door trim. (Refer to Body - "Front door trim")

3.	Disconnect the power door mirror connector from the harness BCW indicator

Removal

1.	Disconnect the negative (-) battery terminal.

2.	Remove the door mirror assembly. (Refer to Body - "Outside Rear View Mirror")

Using a fastener remover (C), remove the mirror (A) as illustration below.

•	Protect mirror (A) from removing tool with cloth (B) wrapped.

•	Be careful not to damage mirror and mirror housing during removing process.

•	Apply force around the center of mirror because to apply force the end of mirror will break it.

4.	Disconnect heat wire and BCW connectors (A) and then remove the mirror.

Installation

1.	Connect mirror heat wire connector and BCW connector then mount mirror.

2.	Install the door mirror assembly.

3.	Connect (-) battery terminal then check if door mirror lamp works normally.

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