DESCRIPTION
General
The lane departure alert system is used depending on models.
The lane departure alert system uses a forward recognition camera to detect lane markers on the road surface, assists the driver's steering operation by using the warning buzzer, the steering vibrator and activates the lane departure warning when needed.
The lane departure alert system also operates on roads with only one lane marker.
The lane departure alert system is controlled by the forward recognition camera.
This system has a last memory function which memorizes the state of the LDA main switch just before the engine switch is turned off and resumes the previous state when the engine switch is turned on (IG) again.
Precaution of Lane Departure Alert System
General Headline Precautions
Use the lane departure alert system with clear lane markers.
The lane departure alert system uses a forward recognition camera installed on the front of the vehicle to recognize white lines. The lane departure alert system does not operate when white lines cannot be recognized. Also, since unnecessary warning sounds may be produced when white lines are not properly recognized, make sure to drive appropriately using the steering wheel even when using the lane departure alert system.
Keep the windshield glass clean around the area where the forward recognition camera is mounted. The performance of forward recognition camera may be affected if dirt, raindrops, condensation, or snow is on the windshield glass.
Do not attach stickers or labels, nor affix any ornaments to the windshield glass.
Do not touch the lens of the forward recognition camera. Fingerprints left on the lens may cause inaccurate detection or non-detection and lane markers may not be detected accurately.
Do not remove the forward recognition camera. Since the angle of the forward recognition camera is precisely adjusted, angle adjustment must be performed after the forward recognition camera is reinstalled, otherwise the forward recognition camera may not recognize lane markers properly.
Do not subject the forward recognition camera to strong impacts.
When the system detects a malfunction, the buzzer sounds, "Lane Departure Alert Malfunction Visit Your Dealer" appears on the multi-information display, and the lane departure alert system stops operating.
Since this does not affect normal driving, keep driving carefully.
The lane departure alert system resumes by turning on the LDA main switch or turning from off to on the engine switch while the system is operating normally.
Changing tires or changing suspension parts may lead to a decline in performance of the system.
Depending on road surface conditions, it may be difficult to hear the warning sound.
Do not modify the headlights or attach stickers to the surface of the light.
Do not install or place anything on the hood or the grille. Also, do not install a grille guard (bull bars, kangaroo bar etc.).
If the windshield is fogged up, use the windshield defogger to remove fog from the windshield. When it is cold, using the heater with air blowing to the feet may cause the upper part of the windshield to fog up. This will have a negative effect on the images.
If the windshield needs to be replaced, contact your Lexus dealer or repair, or another duty qualified and equipped professional.
When the system detects a fault, the buzzer sounds and a warning message will appear to alert the driver and the system stops operating. However, normal driving can continue. Contact your Lexus dealer if any error alert is output repeatedly after turning the engine switch on (IG) again.
When zero point calibration has not been completed on Steering Sensor, Lane Departure Alert System doesn't work.
Precautions Concerning Road Conditions
If the system cannot recognize lane markers under the following conditions, the system will not operate.
When driving through an area with no lane markers, such as a tollbooth, a crossing or before a ticket checkpoint
When driving on a sharp curve
When lane markers are extremely narrow or extremely wide
When the vehicle leans to one side an unusual amount due to a heavy load or improper tire inflation pressure
When the following distance between your vehicle and the vehicle ahead is extremely short
When the lane markers are yellow (These may be more difficult for the system to recognize compared to white markers)
When the lane markers are Botts' dots (raised pavement markers), stone or indistinct
When the lane markers are on a curb etc.
When there are shadows on the road running parallel with lane markers, or if a shadow covers the lane markers
When driving on a particularly bright road surface, such as concrete
When driving on a road surface that is bright due to reflected light
When driving in a location where the light level changes rapidly, such as the entrance to or exit from a tunnel
When sunlight or the headlights of oncoming vehicles are shining directly into the camera lens
When driving on roads that are branching or merging
When driving on a road surface that is wet due to rain, previous rainfall, standing water, etc.
When the vehicle experiences strong up-and-down motion such as when driving on an extremely rough road or on a seam in the pavement
When headlight brightness at nighttime is reduced due to dirt on the lenses, or when the headlights are misaligned
When driving on winding roads or roads that are uneven
When driving on rough or unpaved roads
If the distance between vehicles is extremely short, lane markers may not be recognized correctly. Maintain an appropriate distance from the vehicle ahead.
When the vehicle is parked during hot weather, the system will not operate for a while after the engine switch is turned to on. When the temperature in the cabin reaches the appropriate level at which the forward recognition camera can operate, the system can be resumed.