LANE DEPARTURE ALERT SYSTEM GENERAL GENERAL
OUTLINE
The lane departure alert system uses a pre-crash safety city sensor to detect lane markers on the road surface 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 pre-crash safety city sensor.
This system has a last memory function which memorizes the state of the lane departure alert switch just before the engine switch is turned off and resumes the previous state when the engine switch is turned on (IG) again.
PRECAUTION
General Handling Precautions
Use the lane departure alert system with clear lane markers.
The lane departure alert system alerts the driver of unintentional deviation from the lane. It does not aim to assist the steering operation while the driver releases the steering wheel or does not pay attention to the road ahead.
Do not attach stickers, including transparent stickers, or other items to the outer side of the windshield in front of the front sensor (shaded area in the illustration).
Do not install or attach anything to the inner side of the windshield under the front sensor (shaded area in the illustration).
Do not attach window tinting to the windshield.
If the part of the windshield in front of the front sensor is fogged up or covered with condensation or ice, use the windshield defogger to remove the fog, condensation or ice.
Keep the windshield clean at all times.
The pre-crash safety system may not function properly if the windshield is dirty or covered with an oily film, water droplets, snow, etc. If the inner side of the windshield where the front sensor is installed is dirty, do not attempt to remove the front sensor. Contact any authorized Toyota dealer or repairer, or another duly qualified and equipped professional.
If the windshield needs to be replaced, contact any authorized Toyota dealer or repairer, or another duly qualified and equipped professional.
Do not install an antenna in front of the sensor.
Do not spill liquid onto the sensor.
Do not allow bright lights to shine into the sensor.
When the system detects a malfunction, the LDA indicator light illuminates in yellow appears on the combination meter assembly, and the lane departure alert system stops operating.
Since this does not affect normal driving, keep driving carefully.
When the engine is stopped and started again and the lane departure alert switch is turned on, the lane departure alert system can be resumed as soon as the system returns to normal.
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.).
When the system detects a fault, the system stops operating. However, normal driving can continue. Contact your Toyota dealer if any error alert is output repeatedly after turning the engine switch on (IG) 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, 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 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 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 pre-crash safety city sensor can operate, the system can be resumed.
Precautions for Lane Departure Alert System
Keep the vehicle in the lane by turning the steering wheel appropriately and driving carefully.
The lane departure alert system does not prevent lane deviation. It only alerts the driver of lane deviation by the lane marker indicator illuminates in yellow.
When the warning is activated, operate the steering wheel appropriately to guide the vehicle back into the lane.
The warning can be activated while the vehicle is being driven at approximately 50 km/h (32 mph) or more.
The alarm may be activated early or may not be activated depending on conditions around the vehicle. The driver is required to operate the steering wheel to correct the vehicle path while paying attention to road conditions and traffic.
When driving with tire chains, a spare tire, or similar equipment
When there are objects or structures along the roadside that might be misinterpreted as lane markers (such as guardrails, curbs, reflector posts, etc.)
When driving on snowy roads
When pavement lane markers are difficult to see due to rain, snow, fog, sand, dirt, etc.
When there are visible lines on the pavement from road repairs, or if the remains of old lane markers are still visible on the road
When driving on a road with lane closures due to maintenance, or when driving in a temporary lane