LIGHTING SYSTEM GENERAL

OUTLINE

SPECIFICATION

• *1: RHD models without Lexus night view and pre-crash safety system, LHD models for Europe without Lexus night view and pre-crash safety system with Adaptive High-beam System (AHS)

• *2: LHD models for Europe without Lexus night view and pre-crash safety system and Adaptive High-beam System (AHS)

• *3: Models for Europe with Lexus night view and pre-crash safety system and Adaptive High-beam System (AHS)

• *4: Models for China with Lexus night view and pre-crash safety system

• *5: Models without rear fog light

• *6: Models with rear fog light

PRECAUTION

1. HID Headlight System

   
   

   1. When the HID headlights illuminate, a high voltage (approximately 30000 V) is applied momentarily to the bulb sockets, which could lead to a serious accident. Never connect the tester to the high voltage socket of the HID headlight for measurement, as this may lead to a serious accident because of high voltage.

   2. Whenever inspecting the HID headlight system, make sure water or rain is not present in order to prevent electric shock, the light control switch is off, the battery terminal is removed, and the connector of the light control ECU is disconnected.

   3. Whenever operating the HID headlight, make sure it is only after assembly has been completed and never operate without bulbs installed.

   4. Do not operate the HID headlight using a power source other than the vehicle's.

   5. When there is a defect in the HID headlight or any shock has been applied to it, replace the bulb with a new one.

   6. A discharge bulb reaches a high temperature when it is illuminated. For this reason, the life of the bulb could be shortened if any oil comes in contact with the glass portion of the bulb. Do not touch the glass portion of a bulb with bare hands.

2. Automatic High Beam (AHB) System

   
   

   1. The Automatic High Beam (AHB) system is a system that helps ensure visibility by automatically switching the hi beams on and off.

   2. However, due to control limitations of the Automatic High Beam (AHB) system, it may be necessary to manually switch hi beams on and off. When driving, for safety reasons, make sure to switch the hi beams and lo beams manually in accordance with the driving conditions.

   3. Under the following conditions, the Automatic High Beam (AHB) system might not detect other vehicles or lights correctly, or the hi beams might cause glare or flash pedestrians or the occupants of other vehicles. Manual operation should be considered.

      Factor	Factor
      Weather/Climate	When driving in bad weather (rain, snow, fog, sandstorms, etc.).
      Windshield Glass	When the windshield glass is not clear (ice, snow or frost on the glass). When the windshield glass is dirty (sand, mud, water stains or bugs on the glass). When the windshield glass is cracked. When the windshield glass is fogged up. When the windshield glass has a film attached. When an object on the instrument panel reflects off of the windshield glass. When any other abnormal conditions exist with the windshield glass.
      Automatic High Beam Sensor (Inner Rear View Mirror Assembly)	When a parking tag, magnifying lens or other accessory is mounted on the inner rear view mirror assembly. When the inner rear view mirror assembly or its built-in camera is deformed. When the automatic high beam sensor in the inner rear view mirror assembly is dirty. When any other abnormal conditions exist with the inner rear view mirror assembly or its built-in automatic high beam sensor.
      Nearby Vehicles or Lights	When lights similar to headlights or taillights are in the vicinity of the vehicle. When a nearby vehicle has no lights or its lights are off. When a vehicle in front has misaligned lights or its lights are changing color. When a vehicle in front has extremely dirty headlights or taillights.
      Road Conditions	When driving in an area where the conditions often change between bright and dark. When driving on a road with many uphill and downhill slopes. When driving on a winding road or around a sharp curve. When driving on a bumpy road (cobblestone pavement, gravel road, rough unpaved road, etc.). When highly reflective objects are in front of the vehicle (mirrors, road signs, etc.).
      Vehicle Conditions	When the headlights are damaged, deformed or dirty. When the vehicle posture is abnormal due to a flat tire (or posture has changed due to the vehicle being fully loaded, a trailer being towed etc.). When the vehicle has other malfunctions or if the vehicle has been modified.
      Automatic High Beam (AHB) System	Malfunction: When the automatic high beam indicator light on the combination meter assembly is blinking. Others: When the Automatic High Beam (AHB) system does not seem to be changing between the hi beams and lo beams properly. When the Automatic High Beam (AHB) system is frequently changing between the hi beams and lo beams. When the glare from the hi beams would disturb pedestrians or the drivers of other vehicles.

3. Adaptive High-beam System (AHS)

   
   

   1. The Adaptive High-beam System (AHS) is a system that helps ensure visibility by automatically switching between the lo beam, hi beam and variable shade beam.

   2. However, due to control limitations of the Adaptive High-beam System (AHS), it may be necessary to manually switch hi beams on and off. When driving, for safety reasons, make sure to switch the hi beams and lo beams manually in accordance with the driving conditions.

   3. Under the following conditions, the Adaptive High-beam System (AHS) might not detect other vehicles or lights correctly. Manual operation should be considered.

      Factor	Factor
      Weather/Climate	When driving in bad weather (rain, snow, fog, sandstorms, etc.).
      Windshield Glass	When the temperature in the cabin is high. When the windshield glass is not clear (ice, snow or frost on the glass). When the windshield glass is dirty (sand, mud, water stains or bugs on the glass). When the windshield glass is cracked. When the windshield glass is fogged up. When the windshield glass has a film attached. When an object on the instrument panel reflects off of the windshield glass. When any other abnormal conditions exist with the windshield glass.
      Adaptive High-beam Sensor (Inner Rear View Mirror Assembly)	When a parking tag, magnifying lens or other accessory is mounted on the inner rear view mirror assembly. When the inner rear view mirror assembly or its built-in camera is deformed. When the adaptive high-beam sensor in the inner rear view mirror assembly is dirty. When any other abnormal conditions exist with the inner rear view mirror assembly or its built-in adaptive high-beam sensor.
      Nearby Vehicles or Lights	When lights similar to headlights or taillights are in the vicinity of the vehicle. When a nearby vehicle has no lights or its lights are off. When a vehicle in front has misaligned lights, or its lights are changing color. When a vehicle in front has extremely dirty headlights or taillights.
      Road Conditions	When driving in an area where the conditions often change between bright and dark. When driving on a road with many uphill and downhill slopes. When driving on a winding road or around a sharp curve. When highly reflective objects are in front of the vehicle (mirrors, road signs, etc.).
      Vehicle Conditions	When the headlights are damaged, deformed or dirty. When the vehicle posture is abnormal due to a flat tire (or posture has changed due to the vehicle being fully loaded, a trailer being towed etc.). When the vehicle has other malfunctions or if the vehicle has been modified.
      Adaptive High-beam System (AHS)	Malfunction: When the adaptive high-beam indicator light on the combination meter assembly is blinking. When the indicator light of the inner rear view mirror assembly is blinking. Others: When the Adaptive High-beam System (AHS) does not seem to be changing between the hi beams and lo beams properly. When the headlight mode switching timing of the Adaptive High-beam System (AHS) and the changes in the light-blocking areas seem abnormal or change frequently. When the glare from the hi beams would disturb pedestrians or the drivers of other vehicles.