2019 LEXUS RCF Owners Manual

2894-5. Using the driving support systems
4
Driving
RC F_U WARNING ●
The shape of an object may prevent the sens or from detecting it. Pay particular atten-
tion to the following:
• Wires, fences, ropes, etc.
• Cotton, snow and other materi als that absorb sound waves
• Sharply-angled objects
• Low objects
• Tall objects with upper sections projecting outwards in the direction of your vehi-
cle
• People, animals and other moving objects
• People wearing certain types of clothing ●
The following situations may occur when using the Lexus parking assist-sensor.
• Depending on the shape of the object and other factors, the detection distance
may be shortened, or detection may not be possible.
• Objects may not be detected if they are too close to a sensor.
• There will be a short delay between the de tection of an object and display of the
detection. Even at slow speeds, there is a possibility that the object will come
within a sensor’s detection area before the display is shown and a warning beep
sounds.
• Thin posts or objects lower than a sensor may not be detected when approached,
even if they have been detected once.
• It might be difficult to hear beeps due to the volume of the audio system or air flow
noise of the air co nditioning system.
NOTICE ■
When using intuitive parking assist
In the following situations, the system may not function correctly due to a sensor mal-
function etc. Have the vehicle checked by your Lexus dealer. ●
The intuitive parking assist operation display flashes, and a beep sounds when no
obstacles are detected. ●
If the area around a sensor co llides with something, or is subjected to strong impact.●
If the bumper or grille collides with something. ●
If the display flashes or is displayed contin uously and a buzzer does not sound, except
when the mute function has been turned on.●
If a display error occurs , first check the sensor.
If the error occurs even when there is no ice, snow or mud on the sensor, it is likely that
the sensor is malfunctioning.■
Notes when washing the vehicle
Do not apply intensive bursts of water or steam to the sensor area.
Doing so may result in th e sensor malfunctioning.

290 4-5. Using the driving support systems
RC F_U 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 equippedSummary of the Blind Spot Monitor

2914-5. Using the driving support systems
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Driving
RC F_U BSM main switch This switch is for both the BS M function and RCTA function.
Pressing the switch turns the system on or of f. When the switch is turned on, the indi-
cator on the switch illuminates.
Outside rear view mirror indicators BSM function:
When a vehicle is detected in a blind spot of the outside rear view mirrors or
approaching rapidly from behind into a blin d spot, the outside rear view mirror indi-
cator on the detected side will illuminate. If the turn signal lever is operated toward
the detected side, the outside rear view mirror indicator will flash.
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.
Center Display If a vehicle approaching from the right or left at the rear of the vehicle is detected, the
RCTA icon (  P. 297) for the detected side will be displayed on the Center Display.
This illustration shows an example of a ve hicle approaching from both sides of the
vehicle.
RCTA buzzer 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 main switch is operated to turn the system on. 1
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292 4-5. Using the driving support systems
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Outside rear view mirro r 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. 460)●
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
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 surro unding 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. 471) will be displayed.
In this situation, clear off the dirt or snow and
drive the vehicle with the operation condi-
tions of the BSM function (  P. 295) satisfied
for approximately 10 minutes. If the warning
message does not disappear, have the vehicle
inspected by your Lexus dealer.

2934-5. Using the driving support systems
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Driving
RC F_U The BSM function uses radar sensors to de tect the following vehicles traveling in
adjacent lanes and advises th e driver of the presence of such vehicles via the
indicators on the outside rear view mirrors.
Vehicles that are traveling in areas th at are not visible using the outside rear
view mirrors (the blind spots)
Vehicles that are approaching rapidly from behind in areas that are not visible
using the outside rear view mirrors (the blind spots)BSM function
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294 4-5. Using the driving support systems
RC F_U 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
Approximately 9.8 ft. (3 m) to 197 ft. (60 m) from the rear bumper
*
* : The greater the difference in speed betwee n your vehicle and the detected vehicle is,
the farther away the vehicle will be detect ed, causing the outside rear view mirror
indicator to illuminate or flash.BSM function detection areas
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. 1
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2954-5. Using the driving support systems
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Driving
RC F_U ■
The BSM function is operational when
The BSM function is operational when all of the following conditions are met: ●
The BSM main switch 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.

296 4-5. Using the driving support systems
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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 stro ng 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 standi ng 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 a bicycle carrier or other accessory is installed to 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 main switch 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