OUTLINE
The Lane Departure Alert (LDA) system uses a forward recognition camera to detect lane markers on the road surface and activates the lane departure warning when needed.
The LDA system also operates on roads with only one lane marker.
The LDA system is controlled by the forward recognition camera.
PRECAUTION
Ignition Switch Expressions
The type of ignition switch used on this model differs depending on the specifications of the vehicle. The expressions listed in the table below are used in this section.
| Expression | Ignition Switch (Position) | Engine Switch (Condition) |
|---|---|---|
| Ignition Switch off | LOCK | Off (Lock) |
| Ignition Switch ACC | ACC | On (ACC) |
| Ignition Switch ON | ON | On (IG) |
| Engine Start | START | On (Start) |
General Handling Precautions
Use the LDA system with clear lane markers.
The LDA system uses a forward recognition camera installed on the upper portion of the front windshield glass to recognize white (yellow) lines. The LDA system does not operate when white (yellow) lines cannot be recognized.
Keep the windshield glass clean around the area where the forward recognition camera is mounted. The performance of the 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.
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.).
Do not install an antenna in front of the camera lens.
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 any authorized Toyota dealer or repair, or another duly qualified and equipped professional.
When the system detects a malfunction, the buzzer sounds, the LDA indicator light turns off*1 or illuminates in amber*2, "LDA MALFUNCTION VISIT YOUR DEALER"*1 or "LDA malfunction Visit your dealer"*2 appears on the multi-information display, and the LDA system stops operating.
Since this does not affect normal driving, keep driving carefully.
When the engine is stopped and started again and the LDA switch is turned on, the LDA system can be resumed as soon as the system returns to normal.
*1: Models with analog type combination meter assembly with dot display type multi-information display
*2: Models with Optitron type combination meter assembly
Tech Tips
However, normal driving can continue. Contact your Toyota dealer if any error alert is output repeatedly after turning the ignition switch ON again.
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 distance between your vehicle and the preceding vehicle 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 broken, or there are Botts' dots (raised pavement markers) or indistinct stones
When the lane markers are on a curb etc.
When lane markers are obscured or partially obscured by sand, dirt, 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 preceding vehicle.
When the vehicle is parked during hot weather, the system will not operate for a while after the ignition 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.