Hyundai Elantra: LKAS(Lane Keeping Assist System) / 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:
| A. |
Target (SST : 09890-3V100) surface is perpendicular to the
camera in both horizontal and vertical orientations to maintain maximum
of 1° roll. |
| B. |
Target is mounted to rigid backer material to maintain flatness requirements. |
| C. |
Target has reflective (not faded or poorly painted) markings that are unlike from lane features. |
| D. |
Target is 30 cm wide and 100 cm tall. |
| E. |
Mounting area must NOT have cross hatch patterns or textual markings near the target. |
| F. |
Target should be well lit for optimal performance using
non-fluctuating illumination. There shall be no continuous shadows cast
on the target. |
|
| 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.)) |
|
|
| 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°. |
| • |
The tolerance angle of target in vertical direction is ± 5°. |
|
|
|
| (7) |
Technician ensures target placement location and checks the "OK" message on the diagnostic tool (KDS/GDS). |
| (9) |
Turn "OFF" ignition and "ON" again. |
|
Test Drive
|
The LKAS 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. |
| - |
LKAS operates properly if the lane mark segment space is less than 8 m. |
| - |
LKAS activates at vehicle speed above 64 km/h (40 mph). |
| - |
Perform test drive on car-only road or on a highway. |
|
Description
LKAS (Lane Keeping Assist System) : 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 b ...
Description and Operation
LKAS Unit Components and Components Location