Lexus ES250 2023 Automatic High Beam (AHB) User Manual

Introduction

Automatic High Beam (AHB), a cutting-edge safety feature, is standard on the Lexus ES250 2023. AHB is intended to improve visibility while driving at night by automatically adjusting the headlights of the car based on the environment. AHB ensures that the driver can maintain optimal visibility while reducing the possibility of blinding other road users by combining sensors and clever algorithms.

The Lexus ES250 2023 uses AHB to continuously scan the road ahead and for approaching vehicles as well as the ambient lighting conditions. In order to maximise illumination and visibility, the system automatically switches the headlights to high beam when it detects low light conditions without any approaching traffic or vehicles.

The Automatic High Beam system on the Lexus ES250 2023 adds another level of convenience and safety for nighttime driving by offering the convenience of automatic adjustments. It makes driving safer and more comfortable for everyone on the road by enabling the driver to concentrate more on the road in front of them without the need for manual adjustments.

Automatic High Beam (AHB)

The Automatic High Beam uses an in-vehicle front camera to assess the brightness of streetlights, the lights of vehicle ahead, etc., and automatically turns the high beam on or off as necessary.

WARNING
Limitations of the Automatic High Beam
Do not rely on the Automatic High Beam. Always drive safely, taking care to observe your surroundings and turning the high beam on or off manually if necessary.

To prevent incorrect operation of the Automatic High Beam system
Do not overload the vehicle.

Activating the Automatic High Beam System

1. Press the Automatic High Beam switch.
   
2. Turn the headlight switch to the or AUTO  position.
   The Automatic High Beam indicator will come on when the system is operating.

High beam automatic turning on or off conditions

• When all of the following conditions are met, the high beam will be automatically turned on (after approximately 1 second):
  • Vehicle speed is above approximately 21 mph (34 km/h) or more.
  • The area ahead of the vehicle is dark.
  • There are no vehicles ahead with head-lights or tail lights turned on.
  • There are few streetlights on the road ahead.
• If any of the following conditions are met, the high beam will be automatically turned off:
  • Vehicle speed drops below approximately 17 mph (27 km/h).
  • The area ahead of the vehicle is not dark.
  • Vehicles ahead have headlights or tail lights turned on.
  • There are many streetlights on the road ahead.

Front camera detection information

• The high beam may not be automatically turned off in the following situations:
  • When oncoming vehicles suddenly appear from a curve
  • When the vehicle is cut in front of by another vehicle
  • When vehicles ahead are hidden from sight due to repeated curves, road dividers or roadside trees
  • When vehicles ahead appear from the faraway lane on wide road
  • When vehicles ahead have no lights
• The high beam may be turned off if a vehicle ahead that is using fog lights with-out using the headlights is detected.
• House lights, street lights, traffic signals, and illuminated billboards or signs may cause the high beam to switch to the low beams, or the low beams to remain on.
  The following factors may affect the amount of time taken to turn the high beam on or off:
  • The brightness of headlights, fog lights, and tail lights of vehicles ahead
  • The movement and direction of vehicles ahead
  • When a vehicle ahead only has opera-tional lights on one side
  • When a vehicle ahead is a two-wheeled vehicle
  • The condition of the road (gradient, curve, condition of the road surface etc.)
  • The number of passengers and amount of luggage
• The high beam may be turned on or off when the driver does not expect it.
  Bicycles or similar objects may not be detected.
• In the situations shown below, the system may not be able to accurately detect sur-rounding brightness levels. This may cause the low beams to remain on or the high beams to cause problems for pedes-trians, vehicles ahead or other parties. In these cases, manually switch between the high and low beams.
  In bad weather (rain, snow, fog, sand-storms etc.)
  • The windshield is obscured by fog, mist, ice, dirt etc.
  • The windshield is cracked or damaged
  • The front camera is deformed or dirty
  • When the temperature of the front camera is extremely high
  • Surrounding brightness levels are equal to those of headlights, tail lights or fog lights
  • When headlights or tail lights of vehicles ahead are turned off, dirty, changing color, or not aimed properly
  • When the vehicle is hit by water, snow, dust, etc. from a preceding vehicle
  • When driving through an area of inter-mittently changing brightness and dark-ness
  • When frequently and repeatedly driving ascending/descending roads, or roads with rough, bumpy or uneven surfaces (such as stone-paved roads, gravel roads etc.)
  • When frequently and repeatedly taking curves or driving on a winding road
  • There is a highly reflective object ahead of the vehicle, such as a sign or a mirror
  • The back of a vehicle ahead is highly reflective, such as a container on a truck
  • The vehicle’s headlights are damaged or dirty
  • The vehicle is listing or tilting, due to a flat tire, a trailer being towed etc.
  • The high beam and low beam are repeat-edly being switched between in an abnormal manner
  • The driver believes that the high beam may be causing problems or distress to other drivers or pedestrians nearby

Temporarily lowering sensor sensitivity
The sensitivity of the sensor can be tempo-rarily lowered.

1.  Turn the engine switch off while the following conditions are met.
   • The headlight switch is in or AUTO
   • The headlight switch lever is in low beam position.
   • Automatic High Beam switch is on.
2.  Turn the engine switch to IGNITION ON mode.
3.  Within 60 seconds after 2, repeat pulling the headlight switch lever to the original position then pushing it to the high beam position quickly 10 times, then leave the lever in high beam position.
4. If the sensitivity is changed, the Automatic High Beam indicator turns on and off 3 times.

Automatic High Beam (headlights) may turn on even the vehicle is stopped.

If “Headlight System Malfunction Visit Your Dealer” is displayed
P.359

Turning the high beam on/off manually
Switching to high beam
Push the lever away from you.
The Automatic High Beam indicator will turn off and the high beam indicator will turn on.
Pull the lever to its original position to activate the Automatic High Beam system again.

Switching to low beam
Press the Automatic High Beam switch.
The Automatic High Beam indicator will turn off.
Press the switch to activate the Automatic High Beam system again.

Temporarily switching to the low beams
Pull the lever toward you and then return it to its original position.
The high beams are on while the lever is pulled toward you. However, after the lever is returned to its original position, the low beams remain on for a certain amount of time. Afterwards, the Automatic High Beam will be activated again.

Temporarily switching to the low beams
It is recommended to switch to the low beams when the high beam may cause problems or distress to other drivers or pedestrians nearby.

FAQs

1. What is the Automatic High Beam (AHB) feature in the Lexus ES250 2023?
   The Lexus ES250 2023’s Automatic High Beam (AHB) feature automatically adjusts the high beam headlights based on the amount of traffic in the area.
2. How does the AHB system work?
   The AHB system uses a front-mounted camera to recognize approaching cars as well as cars in front of them. After that, it automatically switches between high and low beams to maintain visibility while avoiding blinding other drivers.
3. Can I manually control the high beams with the AHB feature?
   he AHB feature does not have manual control; it runs automatically. Continually adjusting the high beams based on the current situation.
4. Does the AHB feature work during the day?
   No, the AHB feature is only intended to function at night or in dimly lit areas when the need for the car’s headlights arises.
5. Will the AHB system activate during bad weather conditions?
   Severe precipitation, snow, or fog may have an impact on the AHB system. In such situations, it might not activate or work at its best.
6. Can I disable the AHB feature if I prefer to manually control the high beams?
   The AHB feature can typically be turned off using the settings menu or controls on the car. For detailed instructions on how to disable the AHB feature, consult the vehicle’s manual.
7. Does the AHB system work in all driving situations?
   Highways and well-lit roads are intended to be compatible with the AHB system. On dimly lit roads or in off-road conditions, it might not work or might work only partially.
8. Will the AHB feature blind pedestrians or cyclists?
   The AHB feature is intended to identify and prevent blinding drivers of other vehicles. However, it might not recognize cyclists or pedestrians, so it’s crucial to pay attention and manually switch to low beams when required.
9. Can the AHB system distinguish between different types of vehicles?
   Although the AHB system uses the front camera to detect vehicles, it might not be able to tell them apart based on their type. Headlight or taillight detection is its main reliance.
10. Can the AHB system detect and adjust for curves in the road?
    Some cutting-edge AHB systems might have the capacity to modify the high beams according to the curvature of the road. For accurate information, it’s best to refer to the vehicle’s manual or get in touch with a Lexus dealership as the specific capabilities may vary.
11. Is the AHB feature available on all trim levels of the Lexus ES250 2023?
    Depending on the trim level and optional packages selected, the AHB feature may not be available in all cases. For precise information, it is advised to check the vehicle’s specifications or speak with a Lexus dealership.
12. Does the AHB system require any regular maintenance?
    No special maintenance is required for the AHB system. To ensure optimal performance, it’s crucial to keep the front camera area spotless and free of any impediments.
13. Can the AHB system be retrofitted into older Lexus ES250 models?
    Older models may not be able to be retrofitted with the AHB system or may need significant modifications. For advice on retrofitting options, it is best to speak with a Lexus dealership or an authorized service facility.
14. Does the AHB feature have any limitations?
    There may be some restrictions on the AHB feature, such as reduced functionality in bad weather, difficulty telling pedestrians from cyclists, and the possibility of false detections or failures to detect other vehicles. It’s critical that drivers maintain focus and  When necessary, operate the high beams manually.
15. Is the AHB feature available in all countries where the Lexus ES250 is sold?
    The AHB feature’s accessibility may change based on local laws and market-specific requirements. It is advised to check with nearby Lexus dealerships or the manufacturer’s website for details on availability in particular nations.

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