Kia Forte: Body Electrical System / Front Camera System

Kia Forte 2019-2024 (BD) Service Manual / Body Electrical System / Front Camera System

Components and components location

1. LKA ON/OFF switch
2. Instrument cluster
3. Front view camera


1. LKA ON/OFF switch
2. Instrument cluster
3. Front view camera

Description and operation

System Blockdiagram

System function

Camera unit of the LKA processes below function with the video signal inputted


LKA (Lane Keeping Assist) : The system is designed to help recognize the lane ahead and to give off a lane departure warning when the vehicle starts moving out of the lane by using the camera image and vehicle signal information.


High Beam Assist (HBA) : Detects head lamp and tail lamp lights of vehicle ahead and turns the high beam ON/OFF.


Driver Attention Warning (DAW) : Express alert and warning message through analysis driving pattern.


Highway Driving Assist (HDA) : This is integretion control function to keep the distance between vehicles and lane on highway through interlock with SCC radar.

Lane Keeping Assist (LKA)
High Beam Assist (HBA)

Lane Keeping Assist
When detecting light from vehicle in front

Driver Attention Warning (DAW)
Highway Driving Assist (HDA)

Alert when the driver drives with inattention.
Controlling steering and speed on high way.

System Activation Conditions

LKA Controller Typical Operating Conditions

Note that operating conditions are tuned to meet the customer requirements .

Vehicle speed within 60 - 175 km/h (37.2 - 108.7 MPH)

A lane is clearly visible.

Driver is not overriding the system – applying a large steering torque.

Directional (including hazard) signals are off.

The lane width is within 2.8m to 4.3m

The driver’s hands are on the steering wheel.

The absolute steering angle is < a given value (e.g 90 degrees).

The maximum allowable time for maximum torque application has not been exceeded. (90 seconds)

Reverse or EPS city mode is not engaged.

No fault is present in the system.

Activation conditions for HBA are as follows:

HBA is activated when the light switch is at 'AUTO' and the high beam switch is ON (push).

HBA is activated when the function is enabled and the vehicle speed is 45 km/h or higher, and automatically deactivated when the vehicle speed is 35 km/h or less.

HBA is not activated in daytime even if the activation conditions are satisfied.

In nighttime, HBA detects the preceding vehicle's lamp light and automatically turns the high beam on or off.

Activation conditions for DAW are as follows:

The function should be enabled on the User Setting Menu (USM) of the cluster.

The function should be enabled and the vehicle speed should be 60 - 175 km/h (37.2 - 108.7 MPH)

Repair procedures

Variant Coding Procedures


Incase of replacement of Front Camera Unit with a new one, it is required to perform variant coding because the vehicle has to study option specifications of old vehicle.


Finish the variant coding procedure following the information on the connected KDS screen.

Service Point Target Auto Calibration (SPTAC)


When you need calibration:

Front view camera is removed and mounted

Replace front view camera with a new one

Windshield glass changed

Front view camera coupler of the windshield glass is deformed

Front view camera SPTAC provides the method for the service technician to calibrate the camera by aligning the calibration target (SST: 09890-3V100) with the vehicle on a level ground.

If the calibration is not completed within the specified tolerance front view camera "System Out of Calibration" DTC is indicated.


Method for Correct Alignment of Calibration Target


In order to complete the calibration of the front view camera successfully, install the calibration target as follows:

Install the target (SST: 09890-3V100) vertical to the ground and from the camera referring to the below tolerance angle.


The tolerance ± 1° for the left and right gradient is very important and is sensitive to the flatness of the ground.

Install the compensator vertically using the Level Laser (SST: 09958-3T060 or 09964-C1200).

Arrange the Level Laser (A) on the center of the vehicle by installing it on the roof center above the vehicle's front windshield (same for both short and long distance calibrations) .


Have the laser illuminate starting from the roof center and to all the way to the center of the target, passing through the emblem center.

* The level laser must be set to 'ON' and the holding (locking) function is not used.


Target to be mounted to rigid backer material to maintain flatness requirements.

Target has reflective (not faded or poorly painted) markings that are unlike from lane features.

Target is 30 cm wide and 100 cm tall.

Mounting area must NOT have cross hatch patterns or textual markings near the target.

Target should be well lit for optimal performance using non-fluctuating illumination. There shall be no continuous shadows cast on the target.

The light should be directed toward the target front and the target front should be brighter than the target rear and target.


Service Point Target Auto Calibration(SPTAC) Procedure


It is recommended to check vehicle toe-in and tire pressure levels to ensure proper alignment of the camera to the "world" before proceeding with calibration.

The vehicle to run the calibration routine is to be at nominal production loading capacity.


Windshield must be clean and silk-screen checked so that there is no blockage of the camera.


Service technician connects the diagnostic connector and starts the vehicle. The MFC should not be activated by pressing the switch.


The service calibration routine may not run correctly if any system level fault is active.


If working with a replacement ECU: the service technician initiates the SPTAC Reset configuration.


Service technician either aligns the vehicle to the target or the target to the vehicle.


Locate the bottom of the target 90cm from the ground (max. tolerance: 1cm).


Locate so that the central axis of the target and the central axis of the vehicle match (max. tolerance: 3cm).


Locate the short-distance target (A) so that it adheres by 0cm (B) to the bumper front (max. tolerance: 5cm).


The location of the long-distance target (C) is 100cm (D) before the bumper (max. tolerance: 5cm).


The tolerance angle of target in horizontal direction is ± 10°.

The tolerance angle of target in vertical direction is ± 5°.

The tolerance angle of target in facade center is ±1°.


The technician should complete the short-distance calibration after checking the target location and "OK" message on the KDS.


The technician should complete the long-distance calibration after checking the target location and "OK" message on the KDS (conduct the calibration twice: short and long distances).


Perform the DTC deletion.


Restart after engine OFF.

Test Drive


Be sure to perform test drive to check for normal operation after performing calibration.

Drive on straight road (of longer than 500 m) with 2 white or yellow lane marks at speed of over 60km/h (64mph), and check for the alert as you intentionally steer close to the lane mark.

LKA operates properly if the lane mark segment space is less than 8 m.

Perform test drive on car-only road or on a highway.


The LKA may not activate properly in the following conditions

The LKA may not activate properly when:

It is difficult to distinguish the lane from the road due to dust built up on the lane.

It is difficult to distinguish the color of the lane line from the road.

There is a mark that looks like a lane line near the line.

The lane line is indistinct or damaged.

The number of lanes increases or decreases or the lane lines are crossing (driving through toll plaza, toll gate, road merging or dividing area, etc.).

There are more than two lane lines.

The lane is very wide or narrow.

The lane is not visible due to snow, rain, stain, a puddle or other factors.

Shadows of objects (median strip, guard rail, noise barriers, etc.) surrounding the road are casted on the lane.

The lane is congested or it is replaced by a structure in a construction area.

There is a indication on the road surface such as crosswalk or road signs.

The lane inside the tunnel is covered with dust or oil.

The brightness outside changes suddenly such as when entering or exiting a tunnel.

The head lamps are not on at night or in a tunnel, or light level is low.

There is a boundary structure.

Light such as street light, sunlight or oncoming vehicle light reflects from the water on the road.

Driving with the sun in front of you.

Driving on the bus-only lane or on the left/right of the lane.

The lane suddenly disappears at certain locations such as at the intersection.

The distance from the vehicle ahead is extremely short or that vehicle drives hiding the lane line.

Driving on a steep grade or a sharp curve.

The vehicle vibrates heavily.

The surrounding of the inside rear view mirror temperature is high due to direct sun light.

The lens or windshield is covered with foreign matter.

The sensor cannot detect the lane because of fog, heavy rain, or heavy snow.

The windshield is fogged by humid air in the vehicle.

Putting something on the crash pad.


The LKA may not activate properly in the following conditions:

The LKA is a system to prevent lane departure and assist steering. In any case, do not rely on the steering assist system, and the driver must take the necessary precautions to determine safety matters.

Driver is responsible for being aware of surroundings and steering the vehicle for safe driving practices.

Do not steer the steering wheel suddenly when the steering wheel is being assisted by the system.

LKA helps prevent the driver from moving out of the lane unintentionally by assisting the driver’s steering.

LKA is not working if the camera cannot detect the lane or if the vehicle speed does not exceed 64km/h(40mph),

Do not disassemble MFC temporarily for tinted window or attaching any types of coatings and accessories.

Do not allow any water or liquid to contact the MFC.

Do not remove the MFC parts and do not damage the MFC by a strong impact.

Do not put objects that reflect light on the crash pad.

Excessive noise can make the LKA alarm sound unheard.

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