sensor Lexus IS300h 2017 Service Manual

2894-5. Using the driving support systems
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IS300h_EE(OM53D89E)
After the camera sensor recognizes a sign, it is displayed on the multi-informa-
tion display when the vehicle passes the sign.
●When the driving assist system infor-
mation is selected, a maximum of 3
signs can be displayed. ( P. 111)
●When other than the driving assist
system information is selected, a
speed limit sign or an all canceled
sign can be displayed. ( P. 111)
A no overtaking sign and a speed
limit sign with supplemental mark are
not displayed. However, if signs other than speed limit signs are recog-
nized, they are mentioned in a stack
under the current speed limit sign.
Indication on the multi-information display

2914-5. Using the driving support systems
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IS300h_EE(OM53D89E)
*1: If the turn signal indicator is not operated when changing lanes, the mark does not dis-
play.
*2: Vehicles with a navigation system
In the following situations, the RSA system alerts the driver using a warning dis-
play.
●When the vehicle speed exceeds the sp eed warning threshold applied to the
speed limit of the sign displayed on the multi-information display, the sign
color becomes inverted.
●If it is detected that your vehicle is overtaking when a no overtaking sign is dis-
played on the multi-information display, the sign flashes.
●Vehicles with a navigation system: When the RSA system recognizes a no-
entry sign and detects that the vehicl e has entered a no-entry area based on
the map information of the navigation system, the no-entry sign flashes.
Depending on the situation, traffic envi ronment (traffic direction, speed, unit)
may be detected incorrectly and a warn ing display may not operate properly.
■Automatic turn-off of RSA sign display
One or more signs automatically turn off in the following situations.
●A new sign is not recognized for a certain distance.
●The road changes due to a left or right turn, etc.
■Conditions in which the function may not operate or detect correctly
In the following situations, RSA does not op erate normally and may not recognize signs,
display the incorrect sign, etc. However, this does not indicate a malfunction.
●The camera sensor is misaligned due to a strong impact being applied to the sensor, etc.
●Dirt, snow, stickers, etc. are on th e windshield near the camera sensor.
●In inclement weather such as heavy rain, fog, snow or sand storms
●Light from an oncoming vehicle, the sun, etc. enters the camera sensor.
●The sign is dirty, faded, tilted or bent, and if an electronic sign, the contrast is poor.
●All or part of the sign is hidden by the leaves of a tree, a pole, etc.
●The sign is only visible to the camera sensor for a short amount of time.
●The driving scene (turning, lane change, etc.) is judged incorrectly.
●Even if it is a sign not appropriate for the currently traveled lane, such a sign exists
directly after a freeway branches, or in an adjacent lane just before merging.
●Stickers are attached to the rear of the preceding vehicle.
●A sign resembling a system compatible sign is recognized.
●The vehicle is driven in a country with a different direction of traffic.
Warning display

2924-5. Using the driving support systems
IS300h_EE(OM53D89E)
●Side road speed signs may be detected and displayed (if positioned in sight of the cam-
era sensor) while the vehicle is traveling on the main road.
●Roundabout exit road speed signs may be detected and displayed (if positioned in sight
of the camera sensor) while traveling on a roundabout.
■When driving vehicle in country with different speed unit
Since RSA recognizes signs based on the set un it of the meter, it is necessary to change
the set unit of the meter. Adjust the set unit of the meter to the speed unit of signs in the
current location. ( P. 657)
■Turning the system on/off
■Speed limit sign display
If the power switch was last turned off while a speed limit sign was displayed on the multi- information display, the same sign displays again when the power switch is turned to ON
mode.
■Customization
Setting (e.g. speeding warning threshold) can be changed.
(Customizable feature: P. 119)
Select on the settings display
( P. 111)
Press on the steering wheel.
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2954-5. Using the driving support systems
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Driving
IS300h_EE(OM53D89E)
WARNING
■Situations unsuitable for dynamic radar cruise control
Do not use dynamic radar cruise contro l in any of the following situations.
Doing so may result in inappropriate speed control and could cause an accident result-
ing in death or serious injury.
●Roads where there are pede strians, cyclists, etc.
●In heavy traffic
●On roads with sharp bends
●On winding roads
●On slippery roads, such as those covered with rain, ice or snow
●On steep downhills, or where there are sudden changes between sharp up and down gradients
Vehicle speed may exceed the set speed when driving down a steep hill.
●At entrances to freeways and highways
●When weather conditions are bad enough that they may prevent the sensors from
detecting correctly (fog, snow, sandstorm, heavy rain, etc.)
●When there is rain, snow, etc. on the front surface of the radar sensor or camera sen- sor
●In traffic conditions that require frequent repeated acceleration and deceleration
●When your vehicle is towing a trailer or during emergency towing
●When an approach warning buzzer is heard often

2964-5. Using the driving support systems
IS300h_EE(OM53D89E)
This mode employs a radar sensor to detect the presence of vehicles up to
approximately 100 m (328 ft.) ahead, de termines the current vehicle-to-vehicle
following distance, and operates to main tain a suitable following distance from
the vehicle ahead.
Note that vehicle-to-v ehicle distance will close in when traveling on long downhill
slopes.
Example of constant speed cruising
When there are no vehicles ahead
The vehicle travels at the speed set by the driver. The desired vehicle-to-vehicle dis-
tance can also be set by operating the vehicle-to-vehicle distance button.
Example of deceleration cruising and follow-up cruising
When a preceding vehicle driving sl ower than the set speed appears
When a vehicle is detected running ahead of you, the system automatically deceler- ates your vehicle. When a greater reduction in vehicle speed is necessary, the system
applies the brakes (the stop lights will come on at this time). The system will respond to
changes in the speed of the vehicle ahead in order to maintain the vehicle-to-vehicle distance set by the driver. Approach wa rning warns you when the system cannot
decelerate sufficie ntly to prevent your vehicle from closing in on the vehicle ahead.
Example of acceleration
When there are no longer any preceding vehicles driving slower than the set
speed
The system accelerates until the set speed is reached. The system then returns to con-
stant speed cruising.
Driving in vehicle-to-vehicle distance control mode
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3014-5. Using the driving support systems
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Driving
IS300h_EE(OM53D89E)
When constant speed control mode is selected, your vehicle will maintain a set
speed without controlling the vehicle-to-veh icle distance. Select this mode only
when vehicle-to-vehicle distance contro l mode does not function correctly due
to a dirty radar sensor, etc.
With the cruise control off, press and
hold the “ON/OFF” button for 1.5
seconds or more.
Immediately after the “ON/OFF” but- ton is pressed, the radar cruise control
indicator will come on. Afterwards, it
switches to the cruise control indicator.
Switching to constant speed control
mode is only possible when operating
the lever with the cruise control off.
Accelerate or decelerate, with
accelerator pedal operation, to the
desired vehicle speed (above
approximately 50 km/h [30 mph])
and push the lever down to set the
speed.
Cruise control “SET” indicator will come
on.
The vehicle speed at the moment the lever is released becomes the set speed.
Adjusting the speed setting: P. 298
Canceling and resuming the speed setting: P. 299
Selecting constant speed control mode
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3024-5. Using the driving support systems
IS300h_EE(OM53D89E)
■Dynamic radar cruise control can be set when
●The shift lever is in D or range 4 or higher of S has been selected.
●Range 4 or higher of D has been selected by using the paddle shift switch.
●Vehicle speed is above approximately 50 km/h (30 mph).
■Accelerating after setting the vehicle speed
The vehicle can accelerate by operating the accelerator pedal. After accelerating, the set speed resumes. However, du ring vehicle-to-vehicle distance control mode, the vehi-
cle speed may decrease below the set speed in order to maintain the distance to the pre-
ceding vehicle.
■Automatic cancelation of vehicle-to-vehicle distance control mode
Vehicle-to-vehicle distance control mode is automatically canceled in the following situ-
ations.
●Actual vehicle speed falls below approximately 40 km/h (25 mph).
●VSC is activated.
●TRC is activated for a period of time.
●When the VSC or TRC system is turned off by pressing the VSC OFF switch.
●When snow mode is set.
●The sensor cannot detect correctly because it is covered in some way.
●Pre-collision braking is activated.
If vehicle-to-vehicle distance control mode is automatically canceled for any other rea-
son, there may be a malfunction in the syst em. Contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.

3034-5. Using the driving support systems
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Driving
IS300h_EE(OM53D89E)
■Automatic cancelation of constant speed control mode
Constant speed control mode is automatica lly canceled in the following situations:
●Actual vehicle speed is more than approximately 16 km/h (10 mph) below the set vehi-
cle speed.
●Actual vehicle speed falls below approximately 40 km/h (25 mph).
●VSC is activated.
●TRC is activated for a period of time.
●When the VSC or TRC system is turned off by pressing the VSC OFF switch.
●Pre-collision braking is activated.
If constant speed control mode is automati cally canceled for any other reason, there may
be a malfunction in the syst em. Contact any authorized Lexus retailer or Lexus autho- rized repairer, or an y reliable repairer.
■Warning messages and buzzers for dynamic radar cruise control
Warning messages and buzzers are used to indicate a system malfunction or to inform the driver of the need for ca ution while driving. If a warning message is shown on the
multi-information display, read the message and follow the instructions.
■When the sensor may not be correctly detecting the vehicle ahead
In the case of the following and depending on the conditions, operate the brake pedal
when deceleration of the system is insuff icient or operate the accelerator pedal when
acceleration is required. As the sensor may not be able to correctly detect these types of vehicles, the approach
warning ( P. 300) may not be activated.
●Vehicles that cut in suddenly
●Vehicles traveling at low speeds
●Vehicles that are not moving in the same lane
●Vehicles with small rear ends (trailers with no load on board, etc.)
●Motorcycles traveling in the same lane
●When water or snow thrown up by the surrounding vehicles hinders the detecting of
the sensor

3044-5. Using the driving support systems
IS300h_EE(OM53D89E)
■Conditions under which the vehicle-to-vehicle distance control mode may not function correctly
In the case of the following conditions, op erate the brake pedal (or accelerator pedal,
depending on the situ ation) as necessary. As the sensor may not be able to correctly detect vehicles ahead, the system may not
operate properly.
●When the vehicle ahead of you decelerates suddenly
●When your vehicle is pointing upwards
(caused by a heavy load in the luggage com- partment, etc.)
●Preceding vehicle has an extremely high
ground clearance
●When the road curves or when the lanes are narrow
●When steering wheel operation or your posi-
tion in the lane is unstable

3094-5. Using the driving support systems
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Driving
IS300h_EE(OM53D89E)
Turns the Lexus parking assist-sensor
on/off
When on, the indicator light comes on to inform the driver that the system is
operational.
Lexus parking assist-sensor
: If equipped
The distance from your vehicle to near by obstacles when parallel parking or
maneuvering into a garage is measured by the sensors and communicated via
the displays and a buzzer. Always chec k the surrounding area when using this
system.
Types of sensors
Except F SPORT modelsF SPORT models
Front center sensors
Front corner sensors
Rear corner sensors
Rear center sensors
Lexus parking assist-sensor switch
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