Hyundai Kona: Forward Collision-Avoidance Assist (FCA) System / Description and operation

FCA system is designed to help avoid a potential collision or reduce its impact when drivers applies inadequate, delayed or no brakes at all to avoid a collision.
The system detects the risk factors on the road by using the frontal impact sensor and warn the driver and activate the emergency brake to prevent collision or reduce collision speed.
The following is the system control process
Detect preceding vehicles (pedestrians) and analyze the data (CAN comm.) by using the radar sensor of the Smart Cruise Control System (FCA) and the camera sensor of Lane Departure Warning System (LDWS).
Confirm the object to be protected by FCA system (vehicles and pedestrians) by using the analyzed data.
Calculate the speed reduction depending on the speed, distance, existence or nonexistence of preceding vehicle.
Report the "required speed reduction" to Vehicle Dynamics Control (VDC) (CAN Comm.).
VDC performs automatic control after calculating the required torque to achieve "required speed reduction" (CAN Comm.).

※ The time indicated will be changed according to vehicle speeds.
Step 1 : Issue a visual (display) and vocal alarm when a danger is detected.
Step 2 : Reduce engine torque and activates FCA when there is a high chance of collision.
Step 3 : Activate emergency brake when a collision is imminent.
After stopping the vehicle : Maintain the braking control for a certain time and then release it.
Braking power is adjusted depending on the risk levels of collision, but it is released immediately when it detects the driver's action to avoid a collision.
When it exceeded the maximum operation speed.
When it detected driver's action to avoid a collision such as sudden steering changes.
When the shift lever is in R or P
When you pressed the accelerator pedal half way.
When you drive at 80km/h or faster, the system does not go to step 3 of emergency braking.
- Full auto braking is not available.
While driving at 80km/h or slower on a straight or slightly curved road, the system performs three steps after issuing a warning.
- But a collision may occur at 30km/h or faster depending on the road conditions.
While driving at 80km/h or slower on a straight or slightly curved road, after a visual and vocal warning, FCA is activated to reduce the vehicle speed.
At 80km/h or faster, it's impossible to avoid a collision. Offset should be less than 50%.
FCA does not work on the vehicles backing up or resisting.
At 70km/h or faster, it does not respond to pedestrians.
Offset : Rate of non-overlapping on the line between the front driving car and my car
Offset 100% :

Offset 0% :

Forward Collision-Avoidance Assist (FCA) System

Components and components location
Components The following is the configuration of the FCA system. – Detection device (radar and camera) that can recognize potential obstacles in the front. ...

Other information:

Hyundai Kona (OS) 2018-2020 Service Manual: Electric WGT Control Actuator Specifications
Specification [EWGA Position Sensor] Position Output Voltage [V] Operating Angle [°] Range of Rod [mm], reference Mechanical Close end stop Position (MCP) 4.8 0 0 ...

Hyundai Kona (OS) 2018-2020 Owners Manual: To decrease Cruise Control speed
Push the toggle switch down (SET-) and hold it.Your vehicle will gradually slow down. Release the toggle switch at the speed you want to maintain. Push the toggle switch down (SET-) and release it immediately. The cruising speed will decrease 2.0 km/h (1.2 mph) each time the toggle switch is ...

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