LDA (Lane Departure Alert)

While driving on a freeway or motor highway that has lane markers, this system recognizes the lanes using a camera as a sensor to alert the driver when the vehicle deviates from its lane.

If the system judges that the vehicle may deviate from its lane, it alerts the driver using rapid beeping and indications on the multi-information display.

Turning the LDA system on

The system will be activated depending on the recognizability of lane markers and on the vehicle speed.

Press the “LDA” switch to acti- vate the system.

Press the “LDA” switch to acti- vate the system.

The “LDA” indicator will come on.

Press the switch again to turn the LDA system off.

Indication on the multi-information display

While the LDA system is on, a lane line display is shown on the multi- information display to inform the driver that the LDA system is on.

• When thin lines are shown:

• When thin lines are shown:

Lane markers are not recog- nized by the system, or the LDA system is temporarily canceled.

• When solid lane lines are shown: The LDA system is active.

The LDA system can be operated when

• The “LDA” switch is on.

• Vehicle speed is between 30 mph and 125 mph (48 km/h and 200 km/h).

 - Temporary cancellation of the LDA system

If any of the following occurs, the LDA system will be temporarily canceled. The functions will resume after the necessary operating conditions have returned.

• The turn signal lever is operated.

• The brake pedal is depressed.

• The vehicle speed deviates from the operating range of the LDA system.

• The lane lines cannot be recognized while driving.

• The wiper operates continuously.

• When the lane departure warning function is activated.

Once the lane departure warning function is activated, it will be temporarily canceled and resume a few seconds later.

When the vehicle has been parked in the sun

The LDA system may not be available for a while after driving has started. In such cases, turn the LDA system off and turn it on again after normal temperature returns. When the temperature in the cabin decreases and the temperature around the camera sensor becomes suitable for its operation, the functions will begin to operate.

Warning lights and messages for LDA

Warning lights and messages are used to indicate a system malfunction or to inform the driver of the need for caution while driving.


Before using the LDA system

This system provides information to the driver in accordance with the road geome- try and the driving conditions. Be aware of your surroundings at all times, correct the driving path while driving appropriately and be responsible for your own safety.

This system operates by using the camera to identify lane markers when the LDA switch is on and the vehicle is being driven at the system operating speed.

Operation may be temporarily suspended if the camera cannot recognize the lane markers or if the system cannot operate due to the road environment or driving conditions. Also, since an alarm may sound unnecessarily if the lane markers cannot be correctly identified, make sure to drive responsibly even while the system is operating.

If a malfunction occurs in the system, the driver will be alerted by a buzzer and a dis- play, and LDA operation will be temporarily suspended. However, this does not present a problem to normal driving.

If the alert is displayed even after restarting the engine, have your vehicle inspected by your Lexus dealer.


Turn the LDA off while driving in any of the following situations

Do not use LDA in any of the following situations.

Otherwise, the system may not function correctly and could result in an accident.

• When driving with snow tires, tire chains, a spare tire, or similar equipment.

• When driving with non-standard parts or aftermarket equipment installed (including modified tires and suspensions, etc.).

• When towing a trailer.

• When there are objects or structures along the roadside that might be misinter- preted as lane markers (such as guardrails, curbs, reflector posts, etc.).

• When there is snow in the wheel tracks of the road.

• When there are shadows on the road running parallel with lane markers, or if a shadow is covering the lane markers.

• 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 in a lane other than the driving or passing lanes on a freeway or highway.

• When driving on a road with lane closures due to maintenance, or when driving in a temporary lane.


In the following situations, the LDA will not work, or will not perform reliably

• When the lane markers are interrupted or are not present, such as before a toll- booth.

• When the lane markers are only on one side of the road.

• When driving on a sharp curve.

• When lanes 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 broken or when “Botts’ dots” or “Raised pavement markers” can be seen.

• When the lane markers are obscured or partially obscured by sand, dirt, etc.

• 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 pavement lane markers are difficult to see due to rain, snow, fog, etc.

• When driving on a road surface that is wet due to rain, 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 driving on roads that are branching or merging.

• When headlight brightness is reduced due to dirt on the lenses, or when the headlights are misaligned.


Camera sensor

Observe the following to ensure that the LDA system functions correctly.

• Keep the windshield clean at all times.

• Keep the windshield clean at all times.

LDA performance may deteriorate due to the presence of raindrops, condensa- tion, ice or snow on the windshield.

• Do not subject the camera sensor to strong impact or force, and do not disas- semble the camera sensor.

• Do not change the installation position of the camera sensor or remove it. The direction of the camera sensor is precisely adjusted.

• 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. In such a case, use the windshield defogger to provide warm, dry air to the wind- shield.

• Do not place anything on the dashboard.

The camera sensor may recognize the image reflected on the windshield as lane markings by mistake.

• Do not scratch the camera lens, or let it get dirty.

• Do not attach stickers or other items to the windshield near the camera sensor.

• Adjust the inside rear view mirror correctly so that it does not interfere with the camera sensor.

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