Kia Stinger: Windshield Wiper/Washer / Lane Keeping Assist (LKA)

Kia Stinger CK 2018-2024 Service Manual / Windshield Wiper/Washer / Lane Keeping Assist (LKA)

Components and components location

1. LKA ON/OFF switch
2. Instrument cluster
3. LKA Unit (MFC)

* MFC : Multi Function Camera


Description and operation

System block diagram

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.


Intelligent Speed Limit Warning (ISLW) : Detects traffic signs by using the camera and displays the speed limit by using the map data from navigation.


It supports Forward Collision-Avoidance Assist (FCA) systems.

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

Lane Keeping Assist
When detecting light from vehicle in front

Intelligent Speed Limit Warning (ISLW)
Forward Collision-Avoidance Assist (FCA)

Speed Limit Information
Vehicle and pedestrian detection

System Activation Conditions

LKA Controller Typical Operating Conditions

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

Vehicle speed within 60 kph – 175 kph

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 DAA 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 km/h - 175 km/h.

Repair procedures
Service Point Target Auto Calibration (SPTAC)

This procedure provides a way to calibrate the camera by having the service technician align the car to a well lit simulated straight road target; preferably wall mounted.

The LKA camera will have a "System Out of Calibration" DTC set if not operating within specified tolerances.

The LKA will be supplied for field service replacement with the "System Calibration Required / Variant Coding Error" DTC set if it is a replacement part delivered directly from supplier manufacturing.


Guidelines for Selecting a Suitable Target

In order for LKA Service Calibration-Static routine to complete successfully, the following conditions are required:

Target (SST : 09890-3V100) surface is perpendicular to the camera in both horizontal and vertical orientations to maintain maximum of 1° roll.

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.


Service Point Target Auto Calibration 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 camera module 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.


Bottom of the target is 90 ± 1 cm (35.4 ± 0.4 in.) from the ground and aligned with the camera lens horizontal axis.


The target (A) is placed along the vehicle’s longitudinal axis (centerline) within ±3 cm (±1.2 in.) of target center. (Horizontal deviation (B) : ±3 cm (±1.2 in.))


The positon of target (A) in short distance is 0 ± 5 cm (0 ± 2 in.) (B) in front of front bumper.


The positon of target (A) in long distance is 100 ± 5 cm (39.4 ± 2 in.) (B) in front of front bumper.


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°.

Test Drive


The LKA may not activate properly in the following conditions.

In case lane is not visible due to glare or heavy rain.

In case the road is covered with snow.

In case puddle on the road surface reflects street light or head light from oncoming vehicle.

In case there is blocking object such as sidewalk on the side of the road.

In case there is trace of more than one lane due to road repair.

In case the distance with vehicle in front is very short.

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

Drive on straight road (of longer than 500 m) with 2 white or yellow lane marks at speed of over 64 km/h (40 mph), 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.

LKA activates at vehicle speed above 64 km/h (40 mph).

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


The lane keeping assist (LKA) may not operate in the following conditions:

Lane lines are not visible due to rain, snow, dust, puddles, wet road surface or debris.

The brightness outside the vehicle suddenly changes, for example, when entering a tunnel.

The head lamp is not used or the light is too weak at night or while in a tunnel.

The lane lines are not distinguishable from the road.

The vehicle is on the bus lane or on the lane next to the bus lane.

The road is curved too sharply or the slope of the road is too steep.

Sunlight, street light, or lamp light of the on-coming vehicle is reflected on the wet road surface.

The windshield or the camera lens is contaminated due to dust or debris.

The visibility is poor due to bad weather such as fog, heavy rain, or heavy snow.

The temperature around the rear view mirror is too high due to direct sunlight.

The road lane is too narrow or wide.

The lane lines are faint or damaged.

Condensation on the windshield is not completely removed.

A shadow of median strip covers the road lanes.

The lane lines are not distinguishable from the road due to dust on the road.

There are tracks or marks near the lane lines.

A shadow of median strip, guardrail, sound-absorbing walls, or trees covers the road lanes.

There is a line structure such as pavements.

The distance from the preceding vehicle is too short or the preceding vehicle is on the lane lines.

The vehicle is shaking intensely.

Objects are on the crash pad.

Backlight is lit in the direction of movement.

The lane lines are too complex or are replaced by an alternate structure due to construction.

The visibility is too poor to see the lane lines.

There are two or more lane lines.

The lane lines inside a tunnel are contaminated by dust or oil.

There are road markings such as crosswalk or road signs on the road surface.

The lane lines disappear or are not visible, for example, in a cross-section.

The number of road lanes increases/decreases or the road lanes cross each other complicatedly.

(Tollgate entrances/exits or divided/joined roads)


The lane keeping assist (LKA) prevents lane departures and helps the driver with steering, but the driver must not rely on the LKA, make a decision for safety on their own, and take necessary measures.

This system warns the driver about unintended lane departures and assists the driver in case of any lane departure.

Drivers are responsible for controlling their vehicle in order to drive safely.

Do not turn the steering wheel too rapidly when the system sounds the alarm.

This system is not activated when the vehicle speed is 60 km/h or less or the system fails to detect the lane lines.

Do not tint or put stickers or accessories on the windshield around the rear view mirror.

Keep the installation part of LKA dry.

Do not remove or give an impact on LKA parts.

Do not place reflective materials such as white paper or a mirror on the dashboard. They may cause malfunction due to reflected sunlight.

Excessive noises may prevent the driver from hearing the LKA alarm sound.

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