LIGHTING

General

Precaution of Adaptive High-beam System

1. Switching the beams between high and low manually

   
   

   1. To change the beams from High or Variable shade mode to Low, use the dimmer switch to move it to Lo.

   2. To change the beams from Low or Variable shade mode to High, turn off the auto high beam switch.

2. Ambient light conditions for activating Adaptive High-beam System

   
   

   1. The Adaptive High-beam System uses the forward recognition camera provided in the vehicle interior to monitor in front of the vehicle. The system is activated when there are the headlights of an oncoming vehicle or the tail lights of a proceeding vehicle in a dark environment. The system might be activated unintentionally particularly in any of the following conditions.

      
      

      • The beams are kept in Low without switching to High or Shade mode in a bright environment even when the vehicle is running at a speed of approximately 15 km/h (9 mph) while the adaptive high-beam indicator light in the combination meter assembly is lit.

      • The beams might be kept in High or Shade mode without switching to Low when an oncoming vehicle approaches in a sharp curve or the like or when a vehicle crosses in front of you.

      • The beams might be switched from High to Shade mode when the fog light of an oncoming vehicle is detected.

      • The follow-up speed for the shaded areas or the timing for switching the beams to Low may differ depending on the luminous intensity of the headlights or the fog light of an oncoming vehicle or the tail lights or the rear fog light of a proceeding vehicle.

      • The follow-up speed for the shaded areas or the timing for switching the beams to Low may differ depending on the road conditions, including wet, frozen, and snowed up roads, compared to normal (fine weather) conditions.

      • The follow-up speed for the shaded areas or the timing for switching the beams to Low may differ depending on the number of passengers and loading conditions.

      • In some situations, light distribution may be switched in a different manner that does not match the sense of the driver.

      • The beams may be switched to Low or Shade mode, or the shaded areas may be changed, by recognizing other lights (signs, reflectors, signals, other light emitting objects) than those of an oncoming or proceeding vehicle.

3. Timing when the headlight beams come on in High through Adaptive High-beam System

   
   

   1. The beams do not switch to High immediately even when there are neither the tail lights of a proceeding vehicle nor the headlights of an oncoming vehicle in a dark environment, because the system continuously detects ambient lights.

4. Replacing the windshield glass

   
   

   1. A change in the transmittance of the windshield glass may affect the timing for operating the Adaptive High-beam System. When you need to replace the windshield glass, please ask a LEXUS dealer for a genuine windshield glass and optical axis adjustment for the forward recognition camera to match the optical axis of the headlights.

5. Handling the forward recognition camera

   
   

   1. Please keep in mind the following to avoid damage.

      
      

      • Do not touch the camera lens directly with your hands.

      • Do not apply strong impacts to the forward recognition camera.

      • Do not get wet the forward recognition camera.

6. General precautions

   
   

   1. The Adaptive High-beam System help keeps the visibility of the driver by automatically switching the headlight beams to High or Low, or Shade mode. Please do not fully rely on the automatic control through the Adaptive High-beam System because there are some limits.

   2. Please pay attention to the surrounding conditions for safe driving, and switch the beams to Low or High manually as required.

7. Situations where Adaptive High-beam System does not operate fully

   
   

   1. Please do not use the Adaptive High-beam System but switch the beams to Low or High manually in the following conditions where the system cannot correctly detect the surrounding vehicles and lights.

      
      

      • Weather and climate related factors

      
      

      • Bad weather (including rain, snow, fog, sandstorm).

      • When the tail lights of the proceeding vehicle cannot be seen due to snow splashed up from the vehicle.

      • When the temperature in the vehicle interior is high.

      • Windshield glass related factors

      
      

      • When the windshield glass is unclear (due to that it is frozen, snowed, frosted, or the like).

      • When the windshield glass is dirty (due to that it is adhered with sand, mud, water scale, bugs, or the like).

      • When the windshield glass is cracked.

      • When the windshield glass is clouded.

      • When a film or the like is applied on the windshield.

      • When the windshield glass reflects an object placed on the instrument panel.

      • Others, including that there is an abnormality in the windshield glass.

      • Forward recognition camera related factors

      
      

      • When the forward recognition camera is attached with a parking tag, a magnifier, or other accessories.

      • When the forward recognition camera is deformed.

      • When the forward recognition camera is dirty.

      • Others, including that there is an abnormality in the forward recognition camera.

      • Surrounding vehicle and ambient light related factors

      
      

      • When there are lights similar to headlights and tail lights around the vehicle.

      • When there is an oncoming vehicle or a proceeding vehicle with no lights, abnormally colored lights, or the misaligned lights.

      • When there is an oncoming vehicle with significantly dirty headlights or a proceeding vehicle with significantly dirty tail lights.

      • Road condition related factors

      
      

      • When the light intensity frequently changes between dark and bright.

      • When there are many slopes.

      • When there are many curves or when driving through a sharp curve.

      • When there is a strong reflective object (mirror, sign) ahead of you.

      • Vehicle itself related factors

      
      

      • When a headlight is damaged, deformed, or dirty.

      • When the vehicle is tilted forward, backward, leftward, or rightward while running (including that the vehicle has a flat tire, or is overloaded or towed).

      • Others, including that there is an abnormality in the vehicle, or if the vehicle is modified.

      • Abnormal Adaptive High-beam System related factors

      
      

      • When an abnormality is occurred in the Adaptive High-beam System, causing the adaptive high-beam indicator light in the combination meter assembly to go off.

      • Adaptive High-beam System related factors

      
      

      • When the driver feels something wrong in the timing for switching the beam to High or Low, or Shade mode, or in the change in the shaded areas, or when the switch over repeats frequently in the control of the Adaptive High-beam System.

      • Others, including that there is a possibility that a high beam state gives a dazzling light to other vehicles and pedestrians around the vehicle to cause them to get annoyed.

System Diagram

Layout of Main Components

*1	Forward Recognition Camera(Camera Sensor)	*2	ECM
*3	Headlight Assembly RH Headlight Light Control ECU Sub-assembly RH Light Control ECU Headlight Leveling Motor RH	*4	Headlight Assembly LH Headlight Light Control ECU Sub-assembly RH Light Control ECU Headlight Leveling Motor LH
*5	Brake Booster with Master Cylinder Assembly Skid Control ECU	-	-

*1	Combination Meter Assembly	*2	Main Body ECU (Multiplex Network Body ECU)
*3	Headlight Dimmer Switch Assembly	*4	Airbag Sensor Assembly Yaw Rate Sensor
*5	Central Gateway ECU	*6	Light Control Sensor
*7	Auto High Beam Switch (AHS Switch)	*8	Combination Switch Assembly

Function of Main Components

Operation

Construction