Conditions To Turn The High Beams On/Off Automatically; Camera Sensor Detection Information - Lexus rx450h Service Manual

Conditions to turn the high beams on/off automatically

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When all of the following conditions are met, the high beams will be turned on automat-
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ically (after approximately 1 second):
• The vehicle speed is approximately 21 mph (34 km/h) or more.
• 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 is met, the high beams will turn off automatically:
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• The vehicle speed is below approximately 17 mph (27 km/h).
• The area ahead of the vehicle is not dark.
• Vehicles ahead have their headlights or tail lights turned on.
• There are many streetlights on the road ahead.

Camera sensor detection information

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The high beams may not be automatically turned off in the following situations:
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• When a vehicle suddenly appears from around a curve
• When the vehicle is cut in front of by another vehicle
• When vehicles ahead cannot be detected due to repeated curves, road dividers or
roadside trees
• When vehicles ahead appear in a faraway lane on a wide road
• When the lights of vehicles ahead are not on
The high beams may be turned off if a vehicle ahead that is using fog lights without its
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headlights turned on is detected.
House lights, street lights, traffic signals, and illuminated billboards or signs and other
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reflective objects may cause the high beams to change to the low beams, or the low
beams to remain on.
The following factors may affect the amount of time taken for the high beams to turn on
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or off:
• The brightness of the headlights, fog lights, and tail lights of vehicles ahead
• The movement and direction of vehicles ahead
• When a vehicle ahead only has operational 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 in the vehicle
The high beams may turn on or off unexpectedly.
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Bicycles or similar vehicles may not be detected.
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4-3. Operating the lights and wipers
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