sensor LEXUS RX350 2016 Service Manual

316 4-5. Using the driving support systems
RX350_U_OM48E90U WA R N I N G ■
Situations unsuitable for dynamic radar cruise control
Do not use dynamic radar cruise control 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, cyclers, etc.●
In heavy traffic ●
On roads with sharp bends ●
On winding roads ●
On slippery roads, such as thos e 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

3174-5. Using the driving support systems
4
Driving
RX350_U_OM48E90U This mode employs a radar sensor to detect the presence of vehicles up to
approximately 400 ft. (120 m) ahead, determines the current vehicle-to-vehicle
following distance, and operates to main tain a suitable following distance from
the vehicle ahead. Note that vehicle-to-vehicle 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 th e vehicle-to-vehicle distance button.
Example of deceleration cruising and follow-up cruising
When a preceding vehicle driving slower 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 sufficiently to prevent your ve hicle 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
1
2
3

322 4-5. Using the driving support systems
RX350_U_OM48E90U When constant speed control mode is sele cted, your vehicle will maintain a set
speed without controlling the vehicle-to-vehicle 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 30 mph [50 km/h])
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 be comes the set speed.
Adjusting the speed setting:  P. 3 1 9
Canceling and resuming the speed setting:  P. 3 2 0Selecting constant speed control mode 1
2

3234-5. Using the driving support systems
4
Driving
RX350_U_OM48E90U ■
Dynamic radar cruise control can be set when ●
The shift lever is in the D or range 4 or higher of S has been selected.
(vehicles without padd le shift switches)●
The shift lever is in D.
(vehicles with paddle shift switches) ●
Range 4 or higher of D has been se lected by using the paddle shift.
(vehicles with paddle shift switches) ●
Vehicle speed is above approximately 30 mph (50 km/h). ■
Accelerating after setting the vehicle speed
The vehicle can accelerate by operating the accelerator pedal. After accelerating, the
set speed resumes. However, during 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 25 mph (40 km/h). ●
VSC is activated. ●
TRAC is activated for a period of time. ●
When the VSC or TRAC system is turned off by pressing the VSC OFF switch. ●
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 system. Contact your Lexus dealer. ■
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 10 mph (16 km/h) below the set vehi-
cle speed. ●
Actual vehicle speed falls below approximately 25 mph (40 km/h). ●
VSC is activated. ●
TRAC is activated for a period of time. ●
When the VSC or TRAC system is turned off by pressing the VSC OFF switch. ●
Pre-collision braking is activated.
If constant speed control mode is automatica lly canceled for any other reason, there may
be a malfunction in the system. Contact your Lexus dealer. ■
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 caution while driving. If a warning message is shown on the
multi-information display, read the message and follow the instructions.

324 4-5. Using the driving support systems
RX350_U_OM48E90U ■
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. 321) 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 (traile rs 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 ●
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

3254-5. Using the driving support systems
4
Driving
RX350_U_OM48E90U ■
Conditions under which the ve hicle-to-vehicle distance co ntrol 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 the road curves or when the lanes are
narrow ●
When steering wheel operation or your posi-
tion in the lane is unstable

330 4-5. Using the driving support systems
RX350_U_OM48E90U Front corner sensors
Front center sensors
Rear corner sensors
Rear center sensors
Press “  ” or “  ” of the meter control
switches, select .
Press “  ” or “  ” of the meter control
switches, select “Parking Assist”.
When on, the indicator light comes on
to inform the driver that the system is
operational.Intuitive parking assist 
 : If equippedThe distance from your vehicle to near by obstacles when parallel parking or
maneuvering into a garage is measure d 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
Turning the intuitive parking assist on/off 1
2
3
4
1
2

3314-5. Using the driving support systems
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Driving
RX350_U_OM48E90U When the sensors detect an obstacle, the following displays inform the driver of
the position and distance to the obstacle. ■
Multi-information display
Front corner sensor operation
Front center sensor operation
Rear corner sensor operation
Rear center sensor operation■
Lexus Display Audio or navigation system (8-inch display) screen
Intuitive parking assist When the vehicle is moving forward.
A graphic is automatically displayed
when an obstacle is detected. The
screen can be set so that the graphic
is not displayed. (  P. 335)
: Select to mute the buzzer
sounds.
Intuitive parking assist
Rear Cross Traffic Alert (if
equipped)
When the vehicle is moving back-
ward. A simplified image is displayed on
the upper part of the screen when an
obstacle is detected.Display 1
2
3
4
1
2
3

332 4-5. Using the driving support systems
RX350_U_OM48E90U ■
Navigation system (12.3-inch display) screen
Lexus parking assist-sensor
Rear Cross Traffic Alert (if
equipped) A graphic is automatically displayed
on the side display when an obstacle
is detected. The screen can be set so
that the graphic is not displayed.
(  P. 3 3 5 )
: Select to mute the buzzer
sounds. This function is available
when the vehicle is moving forward. 1
2

3334-5. Using the driving support systems
4
Driving
RX350_U_OM48E90U ■
Distance display
Sensors that detect an obstacle w ill illuminate continuously or blink.
Sensor detection display, obstacle distance Display
* 1
Insert display Approximate distance to obstacle
Lexus parking
assist moni-
tor
* 4
Pa n o r a m i c
view monitor Front and rear
center sensor Front and rear
corner sensor
(continuous) (blinking
slowly) (blinking
slowly) Front center sen-
sor:
3.3 ft. (100 cm)
to
2.0 ft. (60 cm)
Rear center sen-
sor:
4.9 ft. (150 cm)
to
2.0 ft. (60 cm) 
(continuous) (blinking) (blinking) 2.0 ft. (60 cm) to
1.5 ft. (45 cm) 2.0 ft. (60 cm) to
1.5 ft. (45 cm)
(continuous) (blinking
rapidly) (blinking
rapidly) 1.5 ft. (45 cm) to
1.2 ft. (35 cm) 1.5 ft. (45 cm) to
1.2 ft. (35 cm)
(blinking
* 2
or
continuous
* 3
) (continuous) (continuous) Less than
1.2 ft. (35 cm) Less than
1.2 ft. (35 cm)