warning Lexus IS300h 2017 Owners Manual

2704-5. Using the driving support systems
IS300h_EE(OM53D89E)
■Operational conditions
Availability of the pedestrian detection function and pre-collision braking function
depend on the region in which the vehicle was sold.
Read the following for details:
Region A (The pedestrian detection function and pre-collision braking function are available)
The pre-collision system is enabled and the sy stem determines that the possibility of a
frontal collision with a vehicle or pedestrian is high.
Each function is operationa l at the following speeds:
●Pre-collision warning:
• Vehicle speed is between approximately 10 and 180 km/h (7 and 110 mph). (For detecting a pedestrian, vehicle speed is between approximately 10 and 80 km/h [7
and 50 mph].)
• The relative speed between your vehicle and the vehicle or pedestrian ahead is approximately 10 km/h (7 mph) or more.
●Pre-collision brake assist:
• Vehicle speed is between approximately 30 and 180 km/h (19 and 110 mph). (For
detecting a pedestrian, vehicle speed is between approximately 30 and 80 km/h
[19 and 50 mph].) • The relative speed between your vehicle and the vehicle or pedestrian ahead is
approximately 30 km/h (19 mph) or more.
●Pre-collision braking:
• Vehicle speed is between approximately 10 and 180 km/h (7 and 110 mph). (For
detecting a pedestrian, vehicle speed is between approximately 10 and 80 km/h [7 and 50 mph].)
• The relative speed between your vehicle and the vehicle or pedestrian ahead is
approximately 10 km/h (7 mph) or more.
The system may not operate in the following situations:
●If a 12-volt battery terminal has been disconnected and reconnected and then the vehi-
cle has not been driven for a certain amount of time
●If the shift lever is in R
●If VSC is disabled (only the pre-collis ion warning function will be operational)
●If the PCS warning light is flashing or illuminated
RegionsFunction availability
Region AThe pedestrian detection function and pre-collision braking function are available
Region BThe pedestrian detection function is not available and the pre-
collision braking function is available
Region CThe pedestrian detection func tion and pre-collision braking
function are not available

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Driving
IS300h_EE(OM53D89E)
Region B
(The pedestrian detection function is not available and the pre-collision braking func- tion is available)
The pre-collision system is enabled and the sy stem determines that the possibility of a
frontal collision with a vehicle is high.
Each function is operationa l at the following speeds:
●Pre-collision warning:
• Vehicle speed is between approximately 15 and 180 km/h (10 and 110 mph). • The relative speed between your vehicle and the vehicle ahead is approximately 10
km/h (7 mph) or more.
●Pre-collision brake assist:
• Vehicle speed is between approximately 30 and 180 km/h (19 and 110 mph).
• The relative speed between your vehicle and the vehicle ahead is approximately 30 km/h (19 mph) or more.
●Pre-collision braking:
• Vehicle speed is between approximately 15 and 180 km/h (10 and 110 mph).
• The relative speed between your vehicle and the vehicle ahead is approximately 10
km/h (7 mph) or more. The system may not operate in the following situations:
●If a 12-volt battery terminal has been disconnected and reconnected and then the vehi-
cle has not been driven for a certain amount of time
●If the shift lever is in R
●If VSC is disabled (only the pre-collis ion warning function will be operational)
●If the PCS warning light is flashing or illuminated

2724-5. Using the driving support systems
IS300h_EE(OM53D89E)
Region C
(The pedestrian dete ction function and pre-collision braking function are not avail- able)
The pre-collision system is enabled and the sy stem determines that the possibility of a
frontal collision with a vehicle is high.
Each function is operationa l at the following speeds:
●Pre-collision warning:
• Vehicle speed is between approximately 15 and 180 km/h (10 and 110 mph). • The relative speed between your vehicle and the vehicle ahead is approximately 10
km/h (7 mph) or more.
●Pre-collision brake assist:
• Vehicle speed is between approximately 30 and 180 km/h (19 and 110 mph).
• The relative speed between your vehicle and the vehicle ahead is approximately 30 km/h (19 mph) or more.
The system may not operate in the following situations:
●If a 12-volt battery terminal has been disconnected and reconnected and then the vehi- cle has not been driven for a certain amount of time
●If the shift lever is in R
●If VSC is disabled (only the pre-collis ion warning function will be operational)
●If the PCS warning light is flashing or illuminated

2784-5. Using the driving support systems
IS300h_EE(OM53D89E)
■If the PCS warning light flashes and a warning message is displayed on the multi-infor-
mation display
The pre-collision system may be temporarily unavailable or there may be a malfunction
in the system.
●In the following situations, the warning light will turn off, the message will disappear and the system will become operational when normal operating conditions return:
• When the radar sensor or camera sensor or the area around either sensor is hot,
such as in the sun • When the radar sensor or came ra sensor or the area around either sensor is cold,
such as in an extremely cold environment
• When the radar sensor or front grille embl em is dirty or covered with snow, etc. • When the part of the windshield in front of the camera sensor is fogged up or cov-
ered with condensation or ic e (Defogging the windshield: P. 474)
• If the camera sensor is obstructed, such as when the hood is open or a sticker is attached to the windshield near the camera sensor
●If the PCS warning light continues to flash or the warning message does not disappear, the system may be malfunctioning. Have the vehicle inspected by any authorized Lexus
retailer or Lexus authoriz ed repairer, or any reliable repairer immediately.
■If VSC is disabled
●If VSC is disabled (P. 354), the pre-collision brake assist and pre-collision braking
functions are also disabled.
●The PCS warning light will turn on and “VSC Turned Off Pre-Collision Brake System Unavailable” will be displayed on the multi-information display.

2794-5. Using the driving support systems
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IS300h_EE(OM53D89E)
When driving on highways and freeways with white (yellow) lines, this function
alerts the driver when the vehicle might depart from its lane and provides assis-
tance by operating the steering wheel to keep the vehicle in its lane.
The LDA system recognizes visible
white (yellow) lines with the camera
sensor on the upper portion of the front
windshield.
◆Lane departure alert function
When the system determines that
the vehicle might depart from its
lane, a warning is displayed on the
multi-information display, and either
the warning buzzer sounds or the
steering wheel vibrates to alert the
driver.
When the warning buzzer sounds or
the steering wheel vibrates, check
the surrounding road situation and carefully operate the steering wheel
to move the vehicle back to the cen-
ter of the lane.
LDA (Lane Departure Alert with steering control)
: If equipped
Summary of functions
Functions included in LDA system

2804-5. Using the driving support systems
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◆Steering control function
When the system determines that
the vehicle might depart from its
lane, the system provides assistance
as necessary by operating the steer-
ing wheel in small amounts for a
short period of time to keep the
vehicle in its lane.
Except for Israel: If the system
detects that the steering wheel has not been operated for a fixed amount
of time or the steering wheel is not
being firmly gripped, a warning is dis- played on the multi-information dis-
play and the function is temporarily
canceled.
For Israel: If the system detects that
the steering wheel has not been
operated for a fixed amount of time or the steering wheel is not being
firmly gripped, a wa rning is displayed
on the multi-information display and the warning buzzer sounds.
◆Vehicle sway warning function
When the vehicle is swaying or
appears as if it may depart from its
lane multiple times, the warning
buzzer sounds and a message is dis-
played on the multi-information dis-
play to alert the driver.

2814-5. Using the driving support systems
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IS300h_EE(OM53D89E)
WARNING
■Before using LDA system
Do not rely solely upon the LDA system. The LDA system does not automatically drive
the vehicle or reduce the amount of attention that must be paid to the area in front of
the vehicle. The driver must always assume full responsibility for driving safely by pay- ing careful attention to the surrounding cond itions and operating the steering wheel to
correct the path of the vehicle. Also, th e driver must take adequate breaks when
fatigued, such as from driving for a long period of time. Failure to perform appropriate driving operat ions and pay careful attention may lead to
an accident, resulting in death or serious injury.
■To avoid operating LDA system by mistake
When not using the LDA system, use the LDA switch to turn the system off.
■Situations unsuitable for LDA system
Do not use the LDA system in the following situations. The system may not operate properly and le ad to an accident, resulting in death or
serious injury.
●A spare tire, tire chains, etc. are equipped.
●When the tires have been excessively worn, or when the tire inflation pressure is low.
●Tires which differ by structure, manufacturer, brand or tread pattern are used.
●Objects or patterns that could be mistaken for white (yellow) lines are present on the side of the road (guardrails, cu rbs, reflective poles, etc.).
●Vehicle is driven on a snow-covered road.
●White (yellow) lines are difficult to see due to rain, snow, fog, dust, etc.
●Asphalt repair marks, white (yellow) line marks, etc. are present due to road repair.
●Vehicle is driven in a temporary lane or restricted lane due to construction work.
●Vehicle is driven on a road surface which is slippery due to rainy weather, fallen snow, freezing, etc.
●Vehicle is driven in traffic lanes ot her than on highways and freeways.
●Vehicle is driven in a construction zone.
●When your vehicle is towing a trailer or during emergency towing
■Preventing LDA system malfunctions and operations performed by mistake
●Do not modify the headlights or place stickers, etc. on the surface of the lights.
●Do not modify the suspension etc. If the suspension etc. needs to be replaced, con-
tact your authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer.
●Do not install or place anything on the hood or grille. Also, do not install a grille guard
(bull bars, kangaroo bar, etc.).
●If your windshield needs repairs, contact your authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer.

2844-5. Using the driving support systems
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■Operation conditions of each function
●Lane departure alert function
This function operates when all of the following conditions are met.
• LDA is turned on.
• Vehicle speed is approximately 50 km/h (32 mph) or more.
• System recognizes white (yellow) lines. • Width of traffic lane is approx imately 3 m (9.8 ft.) or more.
• Turn signal lever is not operated.
• Vehicle is driven on a stra ight road or around a gentle curve with a radius of more than approximately 150 m (492 ft.).
• No system malfunctions are detected. ( P. 575)
●Steering control function
This function operates when all of the follo wing conditions are met in addition to the
operation conditions for the lane departure alert function.
• Setting for Steering Assist in of the multi-information display is set to On.
( P. 119)
• Vehicle is not accelera ted or decelerated by a fixed amount or more. • Steering wheel is not operat ed with a steering force level suitable for changing
lanes.
• ABS, VSC, TRC and PCS are not operating. • TRC or VSC is not turned off.
• Except for Israel: Hands off steering wheel alert is not displayed. ( P. 285)
●Vehicle sway warning
This function operates when all of the following conditions are met.
• Setting for Sway Warning in of the multi-information display is set to On. ( P. 119)
• Vehicle speed is approximately 50 km/h (32 mph) or more.
• Width of traffic lane is approx imately 3 m (9.8 ft.) or more. • No system malfunctions are detected. ( P. 575)

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IS300h_EE(OM53D89E)
■Temporary cancellation of functions
When operation conditions are no longer met, a function may be temporarily canceled. However, when the operation co nditions are met again, operation of the function is auto-
matically restored. ( P. 284)
■Steering control function
Depending on the vehicle speed, lane depart ure situation, road conditions, etc., the
driver may not feel the function is operat ing or the function may not operate at all.
■Lane departure alert function
The warning buzzer may be difficult to hear due to external noise, audio playback, etc.
Also, it may be difficult to feel steering wheel vibrations due to the road conditions, etc.
■Hands off steering wheel alert
Except for Israel: When the system determines that the driver has removed the hands
from the steering wheel while the steering co ntrol function is operating, a warning mes-
sage is displayed on the multi-information display.
If the driver continues to keep the hands off of the steering wheel, the buzzer sounds, a
warning message is displayed and the function is temporarily canceled. This alert also
operates in the same way when the vehicle is driven with the steering wheel lightly gripped. However, depending on the road co nditions, etc., the function may not cancel.
For Israel: When the system determines that the driver has removed the hands from the
steering wheel while the steering control func tion is operating, a warning message is dis- played on the multi-informatio n display and the buzzer sounds.
■White (yellow) lines are only on one side of road
The LDA system will not operate for the side on which white (yellow) lines could not be recognized.

2874-5. Using the driving support systems
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■Warning message
Warning messages are used to indicate a syst em malfunction or to inform the driver of the need for caution while driving. ( P. 581)
■Customization
 P. 119