2017 Lexus IS300 Owner's Manual / LEXUS 2017 IS200T,IS300,IS350 OWNER'S MANUAL (OM53D76U)

2734-5. Using the driving support systems
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Driving
IS350/300/200t_U (OM53D76U)
The Blind Spot Monitor is a system that has 2 functions:
●The BSM (Blind Spot Monitor) function
Assists the driver in making a decision when changing lanes
●The RCTA (Rear Cross Traffic Alert) function
Assists the driver when backing up
These functions use same sensors.
BSM (Blind Spot Monitor)∗
∗
: If equipped
Summary of the Blind Spot Monitor

2744-5. Using the driving support systems
IS350/300/200t_U (OM53D76U)
BSM main switch
Pressing the switch turns the system on or off. When the switch is set to on, the
switch’s indicator illuminates and the bu zzer sounds. Common switch for Blind Spot
Monitor function and Rear Cross Traffic Alert function.
Outside rear view mirror indicators
BSM function:
When a vehicle is detected in the blind sp ot, the outside rear view mirror indicator
comes on while the turn signal lever is not operated. If the turn signal lever is oper-
ated toward the detected side, the outs ide rear view mirror indicator flashes.
RCTA function:
When a vehicle approaching from the right or left at the rear of the vehicle is
detected, both outsid e rear view mirror indicators will flash.
RCTA buzzer (RCTA function)
If a vehicle approaching from the right or left at the rear of the vehicle is detected, a
buzzer will sound. The buzzer also sounds for approximately 1 second immediately
after the BSM function is operated to turn the system on.
Monitor screen display (RCTA function)
If a vehicle approaching from the right or left at the rear of the vehicle is detected, the
RCTA icon (→ P. 281) for the detected side will be displayed on the monitor screen.
This illustration shows an example of a vehi cle approaching from the left at the rear of
the vehicle.
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2754-5. Using the driving support systems
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Driving
IS350/300/200t_U (OM53D76U)
■Outside rear view mirror indicator visibility
In strong sunlight, the outside rear view mirror indicator may be difficult to see.
■Hearing the RCTA buzzer
The RCTA buzzer may be difficult to hear over loud noises, such as if the audio system
volume is high.
■When there is a malfunction in the Blind Spot Monitor
If a system malfunction is detected due to any of the following, a warning message will be
displayed: ( →P. 522)
●A sensor is malfunctioning
●A sensor is dirty or covere d with snow or a sticker
●The outside temperature is extremely high or low
●Sensor voltage is abnormal
●A sensor is misaligned
■Certification for the Blind Spot Monitor
Turning the BSM function/RCTA function on/off

2764-5. Using the driving support systems
IS350/300/200t_U (OM53D76U)
WARNING
■Handling the radar sensor
Blind Spot Monitor sensors ar e installed behind the left and right sides of the rear
bumper respectively. Observe the following to ensure the Blind Spot Monitor can
function correctly.
●Do not subject a sensor or its surrounding area on the rear bumper to a strong
impact.
If a sensor is moved even slightly off po sition, the system may malfunction and vehi-
cles may not be detected correctly.
In the following situations , have your vehicle inspected by your Lexus dealer.
• A sensor or its surrounding area is subject to a strong impact.
• If the surrounding area of a sensor is sc ratched or dented, or part of them has
become disconnected.
●Do not disassemble the sensor.
●Do not attach stickers to the sensor or surrounding area on the rear bumper.
●Do not modify the sensor or surrounding area on the rear bumper.
●Do not paint the rear bumper any colo r other than an official Lexus color.
●Keep the sensors and the surrounding areas
on the rear bumper clean at all times.
If a sensor or its surrounding area on the rear
bumper is dirty or covered with snow, the
Blind Spot Monitor may not operate and a
warning message (→P. 532) will be dis-
played. In this situation, clear off the dirt or
snow and drive the vehicle with the operation
conditions of the BSM function ( →P. 279)
satisfied for approximately 10 minutes. If the
warning message does not disappear, have
the vehicle inspected by your Lexus dealer.

2774-5. Using the driving support systems
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Driving
IS350/300/200t_U (OM53D76U)
The Blind Spot Monitor function uses radar sensors to detect vehicles that are
traveling in an adjacent lane in the area that is not reflected in the outside rear
view mirror (the blind spot ), and advises the driver of the vehicles existence via
the outside rear view mirror indicator.
The areas that vehicles can be detected in are outlined below.
The range of each detection area is:
Approximately 1.6 ft. (0.5 m) to 11.5
ft. (3.5 m) from either side of the
vehicle
*
*
: The area between the side of the vehicle and 1.6 ft. (0.5 m) from the side of the
vehicle cannot be detected.
Approximately 3.3 ft. (1 m) forward
of the rear bumper
Approximately 9.8 ft. (3 m) from the
rear bumper
BSM function
BSM function detection areas
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WARNING
■Cautions regarding the use of the function
The driver is solely responsible for safe driving. Always drive safely, taking care to
observe your surroundings.
The BSM function is a supplementary function which alerts the driver that a vehicle is in
a blind spot of the outside rear view mirrors or is approaching rapidly from behind into
a blind spot. Do not overly rely on the BSM function. As the function cannot judge if it is
safe to change lanes, over reliance could lead to an accident resulting in death or seri-
ous injury.
As the system may not function correctly under certain conditions, the driver’s own
visual confirmation of safety is necessary.

2784-5. Using the driving support systems
IS350/300/200t_U (OM53D76U)
■The BSM function is operational when
The BSM function is operational when all of the following conditions are met:
●The BSM function is on.
●The shift lever is in a position other than R.
●The vehicle speed is greater than approximately 10 mph (16 km/h).
■The BSM function will detect a vehicle when
The BSM function will de tect a vehicle present in the dete ction area in the following situ-
ations:
●A vehicle in an adjacent la ne overtakes your vehicle.
●Another vehicle enters the detection area when it changes lanes.
■Conditions under which the BSM function will not detect a vehicle
The BSM function is not designed to detect the following types of vehicles and/or
objects:
●Small motorcycles, bicycles, pedestrians, etc.*
●Vehicles traveling in the opposite direction
●Guardrails, walls, signs, parked vehi cles and similar stationary objects*
●Following vehicles that are in the same lane*
●Vehicles traveling 2 lanes away from your vehicle*
*
: Depending on the conditions, detection of a vehicle and/or object may occur.

2794-5. Using the driving support systems
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Driving
IS350/300/200t_U (OM53D76U)
■Conditions under which the BSM function may not function correctly
●The BSM function may not detect vehicles correctly in the following situations:
• When the sensor is misaligned due to a strong impact to the sensor or its surround-
ing area
• When mud, snow, ice, a sticke r, etc. is covering the sensor or surrounding area on
the rear bumper
• When driving on a road surf ace that is wet with standing water during bad weather,
such as heavy rain, snow, or fog
• When multiple vehicles are approaching wi th only a small gap between each vehicle
• When the distance between your vehicle and a following vehicle is short
• When there is a significant difference in speed between your vehicle and the vehicle that enters the detection area
• When the difference in speed between your vehicle and another vehicle is changing
• When a vehicle enters a detection area traveling at about the same speed as your vehicle
• As your vehicle starts from a stop, a vehicle remains in the detection area
• When driving up and down cons ecutive steep inclines, such as hills, dips in the road,
etc.
• When driving on roads with sharp bends, consecutive curves, or uneven surfaces
• When vehicle lanes are wide, or when driving on the edge of a lane, and the vehicle in an adjacent lane is far away from your vehicle
• When towing a trailer (vehicles with towing package)
• When items such as a bicycle carrier are installed on the rear of the vehicle
• When there is a significant difference in height between your vehicle and the vehicle that enters the detection area
• Immediately after the BSM function is turned on
●Instances of the BSM function unnecessarily detecting a vehicle and/or object may
increase in the following situations:
• When the sensor is misaligned due to a stro ng impact to the sensor or its surround-
ing area
• When the distance between your vehicle and a guardrail, wall, etc. that enters the detection area is short
• When driving up and down cons ecutive steep inclines, such as hills, dips in the road,
etc.
• When vehicle lanes are narrow, or when driv ing on the edge of a lane, and a vehicle
traveling in a lane other than the ad jacent lanes enters the detection area
• When driving on roads with sharp bends, consecutive curves, or uneven surfaces
• When the tires are slipping or spinning
• When the distance between your vehicle and a following vehicle is short
• When a bicycle carrier or other accessory is installed to the rear of the vehicle
• When towing a trailer (vehicles with towing package)

2804-5. Using the driving support systems
IS350/300/200t_U (OM53D76U)
The RCTA function uses radar sensors to detect vehicles approaching from the
right or left at the rear of the vehicle an d alerts the driver of the presence of such
vehicles by flashing the outside rear view mirror indicators and sounding a
buzzer.
Approaching vehicles
Detection areas of approaching vehicles
RCTA function
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