high beam LEXUS GS300H 2019 User Guide

2454-3. Operating the lights and wipers
4
Driving
GS450h_300h_OM_OM30F92E_(EE)
●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 highbeams to cause problems for pedestrians, vehicles ahead or other parties. In these
cases, manually switch between the high and low beams.
• In bad weather (rain, snow, fog, sandstorms etc.) • The windshield is obscured by fog, mist, ice, dirt etc.
• The windshield is cracked or damaged. • The camera sensor is deformed or dirty.• The camera sensor temperature is extremely high.
• Surrounding brightness levels are equal to th ose of headlights, tail lights or fog lights. • Vehicles ahead have headlights that are either switched off, dirty, are changing color,or are not aimed properly.
• The vehicle is hit by water, snow, dust, etc. from a preceding vehicle. • When driving through an area of interm ittently changing brightness and darkness. • When frequently and repeatedly driving ascending/descending roads, or roads with
rough, bumpy or uneven surfaces (such as stone-paved roads, gravel tracks 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 repeated ly being switched between in an abnor- mal manner.• The driver believes that the high beam may be causing problems or distress to other
drivers or pedestrians nearby.
■Warning message
Warning messages are used to indicate a syst em malfunction or to inform the driver of
the need for caution. ( P. 466)
■Customization
Some functions can be customized. ( P. 561)

2464-3. Operating the lights and wipers
GS450h_300h_OM_OM30F92E_(EE)
Automatic High Beam
Push the lever away from you with
the headlight switch in the or
position.
Press the Automatic High Beam
switch.
The Automatic High Beam indicator will come on when the headlights are turned
on automatically to indicate that the sys- tem is active.
: If equipped
The Automatic High Beam uses an in-vehicle camera sensor to assess the
brightness of streetlights, the lights of vehicles 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. Al ways 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
2

2474-3. Operating the lights and wipers
4
Driving
GS450h_300h_OM_OM30F92E_(EE)
■Switching to low beam
Pull the lever to the original position.
The Automatic High Beam indicator will turn off.
Push the lever away from you to acti- vate the Automatic High Beam sys-tem again.
■Switching to high beam
Press the Automatic High Beam
switch.
The Automatic High Beam indicator will turn off and the high beam indi-
cator will turn on.
Press the switch to activate the Auto- matic High Beam system again.
Turning the high beam on/off manually

2484-3. Operating the lights and wipers
GS450h_300h_OM_OM30F92E_(EE)
■High beam automatic turning on or off conditions
●When all of the following conditions are fulfilled, the high beam will be automatically 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 fulfille d, the high beam will be automatically turned off:
• Vehicle speed drops below appr oximately 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
●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 vehicles ahead that is using fog lights without usingthe 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 light s, 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.
●Bicycles or similar objects may not be detected.

2494-3. Operating the lights and wipers
4
Driving
GS450h_300h_OM_OM30F92E_(EE)
●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 highbeams to cause problems for pedestrians, vehicles ahead or other parties. In these
cases, manually switch between the high and low beams.
• In bad weather (rain, snow, fog, sandstorms etc.) • The windshield is obscured by fog, mist, ice, dirt etc.
• The windshield is cracked or damaged. • The inside rear view mirror or ca mera sensor is deformed or dirty. • The camera sensor temperature is extremely high.
• Surrounding brightness levels are equal to th ose of headlights, tail lights or fog lights. • Vehicles ahead have headlights that are either switched off, dirty, are changing color,or are not aimed properly.
• When driving through an area of interm ittently changing brightness and darkness. • When frequently and repeatedly driving ascending/descending roads, or roads withrough, bumpy or uneven surfaces (such as stone-paved roads, gravel tracks 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 repeated ly being switched between in an abnor-
mal manner. • The driver believes that the high beam may be causing problems or distress to otherdrivers or pedestrians nearby.
• When going through the Straits of Dover.
■Warning message
Warning messages are used to indicate a syst em malfunction or to inform the driver of
the need for caution. ( P. 466)

261
4
4-5. Using the driving support systems
Driving
GS450h_300h_OM_OM30F92E_(EE)
Lexus Safety System+
◆PCS (Pre-Crash Safety system)
 P. 270
◆LKA (Lane-Keeping Assist)
 P. 282
◆AHS (Adaptive High-beam System)
P. 241
◆Automatic High Beam
P. 246
◆RSA (Road Sign Assist)
 P. 291
◆Dynamic radar cruise control with full-speed range
 P. 296
: If equipped
The Lexus Safety System+ consists of the following drive assist systems and
contributes to a safe and comfortable driving experience:
WARNING
■Lexus Safety System+
The Lexus Safety System+ is designed to operate under the assumption that the driver will drive safely, and is designed to help reduce the impact to the occupants and the vehicle in the case of a collision or assist the driver in normal driving conditions.
As there is a limit to the degree of reco gnition accuracy and control performance that this system can provide, do no t overly rely on this system. The driver is always responsi- ble for paying attention to the vehicle’s surroundings and driving safely.

449 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS450h_300h_OM_OM30F92E_(EE)
■Replacing the following bulbs
If any of the lights listed below has burnt out, have it replaced by any autho-
rized Lexus retailer or Lexus authorized repairer, or any reliable repairer.
●Headlights
●Front position lights/daytime running lights
●Front fog lights
●Front turn signal lights (vehicles with triple-beam headlights)
●Side turn signal lights
●Stop/tail lights
●Stop lights
●Rear fog light
●Rear turn signal lights
●Back-up lights
●High mounted stoplight
●License plate lights
■LED Lights
The lights other than the front turn signal lig ht (vehicles with single-beam headlights) and outer foot lights each consist of a number of LEDs. If any of the LEDs burn out, take your
vehicle to any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer to have the light replaced.
■Condensation build-up on the inside of the lens
Temporary condensation build-up on the inside of the headlight lens does not indicate a malfunction. Contact any authorized Lexus reta iler or Lexus authorized repairer, or any reliable repairer for more information in the following situations:
●Large drops of water have built up on the inside of the lens.
●Water has built up inside the headlight.
■When replacing light bulbs
 P. 441

4787-2. Steps to take in an emergency
GS450h_300h_OM_OM30F92E_(EE)
(If equipped)
Indicates a malfunction in the LKA (Lane-Keeping Assist) system
A buzzer also sounds.  Have the vehicle inspected by any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer.
(If equipped)
The operation conditions of the camera sensor (tem- perature, etc.) are not met.
 When the operation conditions of the camera sen- sor (temperature, etc.) are met, the following sys-tems will become available.
• PCS (Pre-Crash Safety system) • LKA (Lane-Keeping Assist) system• RSA (Road Sign Assist)
• Dynamic radar cruise control with full-speed range • Dynamic radar cruise control• AHS (Adaptive High-beam System)
• Automatic High Beam
(If equipped)
Indicates that the system is temporarily unavailable due
to a malfunction in a sensor other than the camera sen- sorA buzzer also sounds.
 Turn the LKA (Lane-Keeping Assist) system off, wait for a little while, and then turn the LKA (Lane-Keep-ing Assist) system back on.
(If equipped)
Dirt, rain, condensation, ice, snow, etc., are present onthe windshield in front of the camera sensor.
The following systems will be temporarily unusable. • PCS (Pre-Crash Safety system)• LKA (Lane-Keeping Assist) system
• RSA (Road Sign Assist) • Dynamic radar cruise control with full-speed range• Dynamic radar cruise control
• AHS (Adaptive High-beam System) • Automatic High Beam Turn the system off, remove any dirt, rain, condensa-
tion, ice, snow, etc., from the windshield, and then turn the system back on.
Warning messageDetails/Actions
(Flashes)
(Flashes)

4847-2. Steps to take in an emergency
GS450h_300h_OM_OM30F92E_(EE)
Indicates that engine oil level is low This message may appear if the vehicle is stopped on a
slope. Move the vehicle to a level surface and check to see if the message disappears.A buzzer also sounds.
 Check the level of engine oil, and add if necessary.
Indicates that the hybrid system has overheated This message may be displayed when driving under
severe operating conditions. (For example, when driv- ing up a long steep hill.)A buzzer also sounds.
 Stop and check. (P. 535)
Indicates a malfunction in: • The AHS (Adaptive High-beam System) (ifequipped);
• The Automatic High Beam (if equipped); • The AFS (Adaptive Front-lighting System) (ifequipped); or
• The LED headlight system A buzzer also sounds. Have the vehicle inspected by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable repairer.
(If equipped)
Indicates a malfunction in the RSA (Road Sign Assist)
A buzzer also sounds  Have the vehicle inspected by any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer.
Warning messageDetails/Actions

4887-2. Steps to take in an emergency
GS450h_300h_OM_OM30F92E_(EE)
(If equipped)
Indicates that the Automatic High Beam switch was pressed while the low beams were on Turn the high beam headlights on before pressing
the Automatic High Beam switch.
(If equipped)
Indicates that the Adaptive High-beam System switch was pressed while th e low beams were on  Turn the high beam headlights on before pressing
the Adaptive High-beam System switch.
(If equipped)
Indicates that, since the VSC (Vehicle Stability Control)
system was turned off, the pre-crash braking and pre- crash brake assist are stopped (The pre-crash warningfunction will be operational)
 Turn the VSC on. (P. 327)
(If equipped)
Indicates that the PCS (Pre-Crash Safety system) is tem- porarily unavailableA buzzer also sounds.
 When conditions improve, the system resumes operation. If this item is displayed continuously, have
the vehicle inspected by any authorized Lexus retailer or Lexus authorized repairer, or any reliablerepairer.
Warning messageDetails/Actions
(Flashes)