FCA produces warning messages, warning alarms, and emergency braking based on the level of risk of a frontal collision, such as when a vehicle ahead suddenly brakes, or when the system detects that a collision with a pedestrian is imminent.
Collision Warning (First warning)

This warning message appears on the LCD display with a warning chime. Additionally, some vehicle system intervention occurs by the engine management system to help decelerate the vehicle.
- Your vehicle speed may decelerate moderately.
- The FCA system limitedly controls the brakes to preemptively mitigate impact in
a collision.
- If you select "Warning Only", the FCA system activates and produces only warning
alarms in accordance with the collision risk levels.You should control the brake
directly because the FCA system do not control the brake.
Emergency Braking (Second warning)

This warning message appears on the LCD display with a warning chime.
Additionally, some vehicle system intervention occurs by the engine management system to help decelerate the vehicle.
- The FCA system limitedly controls the brakes to preemptively mitigate impact
in a collision. The brake control is maximized just before a collision.
- If you select "Warning Only", the FCA system activates and produces only warning
alarms in accordance with the collision risk levels.You should control the brake
directly because the FCA system do not control the brake.
Brake operation
CAUTION
WARNING
The FCA braking control cannot completely stop the vehicle nor avoid all collisions. The driver should hold the responsibility to safely drive and control the vehicle.
WARNING
The FCA system logic operates within certain parameters, such as the distance from the vehicle or pedestrian ahead, the speed of the vehicle ahead, and the driver's vehicle speed. Certain conditions such as inclement weather and road conditions may affect the operation of the FCA system.
WARNING
Never deliberately drive dangerously to activate the system.
System Setting and Activation
FCA Sensor (Front Radar/Front Camera)Hyundai Elantra AD (2016-2020) Service Manual: Horn
Components and Components Location
Component Location
1. Horn switch2. Horn relay (Built - in PCB Block)3. Horn (Low pitch)4. Horn (High pitch)5. Clock spring
Repair procedures
Removal
1.
Remove the front bumper cover.
(Refer to Body - "Front Bumper Cover")
2.
Remove the high pitch ...
Hyundai Elantra AD (2016-2020) Service Manual: ESC OFF Switch Repair procedures
Removal
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Remove the crash pad lower panel.
(Refer to Body - "Crash Pad")
3.
Remove the side crash pad switch.
4.
Disconnect the ESC OFF switch connector.
5.
Check the continuity between the switch termi ...