Hyundai Ioniq: Rear Corner Radar System / Description and operation

Hyundai Ioniq (AE) 2017-2025 Service Manual / Advanced Driver Assistance System (ADAS) / Rear Corner Radar System / Description and operation

Description

Rear corner radar is a system that uses two magnetic wave radar sensors attached on the rear panel to measure the distance from the following vehicles and provides the sensing and (visual and auditory) alarm of any vehicle coming into the blind spot.

–	Blind Spot Detection (BCW) : Senses other vehicles in the rear coner radar zone and the display a warning lndicator on the sied mirror for the driver. Warning lamp is blink ON when driver turns on the turn signal lamp to enter the lane where another vehicle is.

–	Lane Change Assist (LCA) : Senses other high-speed access vehicles in the LCA zone and the display awarning lndicator on the sied mirror for the driver. Warning lamp is blink ON when driver turns on the turn signal lamp without recognizing any sudden approaching vehicle from that direction.

–	RCCW (Rear Cross-Traffic Collision Warning) : When the vehicle is on the reverse, the RCCW generates alarm to alert another vehicle approaching from the rear and side.

System Operating Mode

1.	When starting the engine with the switch off, OFF mode is on.

2.	When pressing ON switch in OFF mode, Passive mode is on.

If starting the engine with the switch ON, Passive mode is on.

※ When IGN is ON, the switch is in the initial state : The last position is kept.

–	If IGN OFF → ON with the switch ON, the switch is ON.

–	If IGN OFF → ON with the switch OFF, the switch is OFF.

4.	If you start the engine with BCW switch ON, or if you turn on BCW with BCW switch OFF, the warning lamp of the door mirror flickers for 2 to 3 seconds. This is to inform the driver that the BCW system is ready. (provided that if the system is in Fail mode, there is no flickering.)

5.	If the activation conditions (speed and curvature radius) are met while driving, Active mode is on (warning issued).

6.	If the activation conditions (speed and curvature radius) are not met while driving, Passive mode is on (warning removed).

7.	If BCW & LCA operation fails in any mode, Fail mode is on.

8.	If BCW & LCA operation operates normally in Fail mode, OFF mode is on.

9.	If pressing OFF switch while BCW & LCA function is operating (Active/Passive), OFF mode is on.

Warning Condition

1.	Warning zone

2.	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 D 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 2.5.

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 2.5 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 not more than 2.5 sec.

6.	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 to 255㎞/h ("-" means overtaking the preceding vehicle)

7.	Sensor deactivation conditions ① BCW & LCA switch (indicated by the switch LED) is off. ② Vehicle Speed : 28 km/h or slower ③ Curvature radius : 125m or less ④ Relative car speed : All except -10 to 255㎞/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.

RCCA (Rear Cross-Traffic Collision-Avoidance Assist System )

Item	Specification	Remarks
Vehicle speed	0 to -10 kph	R' position
Time To Collision	4 - 36 kph	+ : closing
Operating area	0.5 - 20 m	Vehicle : 20m Bike : 15m

① It is a function for helping to check the vehicle approaching from the rear and side when the car is started to backwards from parking to the front in the parking lot.

② The alarming is made for the vehicle within 2 seconds based on the Time To Collision (TTC) and the human is excluded for alarming (The alarming may not be made.)

Time To Collision (TTC) : It means to alarm in case of 2 - 3.5 seconds for estimated time to colliding through calculating the relative distance/relative velocity. (It is changed depending on the relative speed of approaching.)

③ Warning zone

Components and components location

C..

Repair procedures

Diagnosis with GDS1.REAR CORENER RADAR system defects can be quickly diagnosed with the GDS. GDS operates actuator quickly to monitor, input/output value and self diagnosis...

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