Kia Niro: Lane Keeping Assist System (LKAS) / 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 LKAS camera will have a "System Out of Calibration" DTC set if not operating
within specified tolerances.
The LKAS 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.
| 1. |
Guidelines for Selecting a Suitable Target
In order for LKAS 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.
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| – |
Target to be mounted to rigid backer material to maintain flatness
requirements.
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Target has reflective (not faded or poorly painted) markings
that are unlike from lane features.
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Target is 30 cm wide and 100 cm tall.
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Mounting area must NOT have cross hatch patterns or textual markings
near the target.
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Target should be well lit for optimal performance using non-fluctuating
illumination. There shall be no continuous shadows cast on the target.
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| 2. |
Service Point Target Auto Calibration Procedure
| (1) |
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.
|
| (2) |
Windshield must be clean and silk-screen checked so that there
is no blockage of the camera.
|
| (3) |
Service technician connects the diagnostic connector and starts
the vehicle. The camera module should not be activated by pressing
the switch.
|
| (4) |
The service calibration routine may not run correctly if any
system level fault is active.
|
| (5) |
If working with a replacement ECU: the service technician initiates
the SPTAC Reset configuration.
|
| (6) |
Service technician either aligns the vehicle to the target or
the target to the vehicle.
| a. |
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.))
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|
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| b. |
The positon of target (A) in short distance is 0 ± 5
cm (0 ± 2 in.) (B) in front of front bumper.
|
| c. |
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°.
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• |
The tolerance angle of target in vertical
direction is ± 5°.
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• |
The tolerance angle of target in facade
center is ±1°.
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| (7) |
Technician ensures target placement location and checks the "OK"
message on the diagnostic tool (KDS/GDS).
|
| (8) |
After confirming the calibration target location in remote distance,
click "OK" on diagnostic device.
(Perform location calibration 2 times.)
|
| (9) |
Technician ensures target placement location and checks the "OK"
message on the diagnostic tool (KDS/GDS).
|
| (11) |
Turn off IGN and then on.
|
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Test Drive
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The LKAS may not activate properly in the following conditions.
| – |
In case lane is not visible due to glare or heavy rain.
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In case the road is covered with snow.
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In case puddle on the road surface reflects street light or head
light from oncoming vehicle.
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In case there is blocking object such as sidewalk on the side
of the road.
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| – |
In case there is trace of more than one lane due to road repair.
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In case the distance with vehicle in front is very short.
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| – |
Be sure to perform test drive to check for normal operation after
performing optical angle test.
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| – |
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.
|
| – |
LKAS operates properly if the lane mark segment space is less
than 8 m.
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| – |
LKAS activates at vehicle speed above 64 km/h (40 mph).
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| – |
Perform test drive on car-only road or on a highway.
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The lane keeping assist system (LKAS) 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.
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| – |
The lane lines are not distinguishable from the road.
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| – |
The vehicle is on the bus lane or on the lane next to the bus
lane.
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The road is curved too sharply or the slope of the road is too
steep.
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| – |
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.
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| – |
The visibility is poor due to bad weather such as fog, heavy
rain, or heavy snow.
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| – |
The temperature around the rear view mirror is too high due to
direct sunlight.
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The road lane is too narrow or wide.
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The lane lines are faint or damaged.
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| – |
Condensation on the windshield is not completely removed.
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| – |
A shadow of median strip covers the road lanes.
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| – |
The lane lines are not distinguishable from the road due to dust
on the road.
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| – |
There are tracks or marks near the lane lines.
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| – |
A shadow of median strip, guardrail, sound-absorbing walls, or
trees covers the road lanes.
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| – |
There is a line structure such as pavements.
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| – |
The distance from the preceding vehicle is too short or the preceding
vehicle is on the lane lines.
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| – |
The vehicle is shaking intensely.
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| – |
Objects are on the crash pad.
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| – |
Backlight is lit in the direction of movement.
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| – |
The lane lines are too complex or are replaced by an alternate
structure due to construction.
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| – |
The visibility is too poor to see the lane lines.
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| – |
There are two or more lane lines.
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| – |
The lane lines inside a tunnel are contaminated by dust or oil.
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| – |
There are road markings such as crosswalk or road signs on the
road surface.
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The lane lines disappear or are not visible, for example, in
a cross-section.
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| – |
The number of road lanes increases/decreases or the road lanes
cross each other complicatedly.
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| – |
(Tollgate entrances/exits or divided/joined roads)
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The lane keeping assist system (LKAS) prevents lane departures and helps
the driver with steering, but the driver must not rely on the LKAS, 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.
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| – |
Drivers are responsible for controlling their vehicle in order
to drive safely.
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| – |
Do not turn the steering wheel too rapidly when the system sounds
the alarm.
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This system is not activated when the vehicle speed is 60 km/h
or less or the system fails to detect the lane lines.
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| – |
Do not tint or put stickers or accessories on the windshield
around the rear view mirror.
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| – |
Keep the installation part of LKAS dry.
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| – |
Do not remove or give an impact on LKAS parts.
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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 LKAS
alarm sound.
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Description
System block diagram
System function
Camera unit of the LKAS processes below function with the video signal inputted
1.
LKAS (Lane Keeping Assist Sys ...
Description and operation
