Lexus GS450h Owner's Manual page 248

248
4-3. Operating the lights and wipers
High beam automatic turning on or off conditions
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When all of the following conditions are fulfilled, the high beam will be automatically
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turned on (after approximately 1 second):
• Vehicle speed is above approximately 40 km/h (25 mph).
• The area ahead of the vehicle is dark.
• There are no vehicles ahead with headlights or tail lights turned on.
• There are few streetlights on the road ahead.
If any of the following conditions are fulfilled, the high beam will be automatically turned
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off:
• Vehicle speed drops below approximately 30 km/h (19 mph).
• 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.
Camera sensor detection information
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The high beam may not be automatically turned off in the following situations:
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• 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 vehicles ahead that is using fog lights without using
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the headlights is detected.
House lights, street lights, traffic signals, and illuminated billboards or signs may cause
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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
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off:
• The brightness of headlights, fog lights, and tail lights of vehicles ahead
• The movement and direction of vehicles ahead
• When vehicle ahead only has operational lights on one side
• When 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.
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Bicycles or similar objects may not be detected.
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