warning LEXUS RX350 2019 Owners Manual

2454-2. Driving procedures
4
Driving
RX350/RX350L_U WARNING ■
When driving on slippery road surfaces
Be careful of downshifting an d sudden acceleration, as this could result in the vehicle
skidding to the side or spinning. ■
To prevent an accident wh en releasing the shift lock
Before pressing the shift lock override butto n, make sure to set the parking brake and
depress the brake pedal.
If the accelerator pedal is accidentally depressed instead of the brake pedal when the
shift lock override button is pressed and the shift lever is shifted out of P, the vehicle
may suddenly start, possibly leading to an a ccident resulting in death or serious injury.

2494-2. Driving procedures
4
Driving
RX350/RX350L_U ■
Parking brake indicator light and parking brake light ●
Depending on the engine switch mode, the parking brake indicator light and parking
brake light will turn on and stay on as described below:
IGNITION ON mode: Comes on unt il the parking brake is released.
Not in IGNITION ON mode: Stays on for approximat ely 15 seconds.●
When the engine switch is turned off with the parking brake set, the parking brake indi-
cator light and parking brake light will stay on for about 15 seconds. This does not indi-
cate a malfunction. ■
Changing the mode
When changing the automatic mode on/off , the message will be shown on the multi-
information display and the buzzer sounds. ■
Parking brake engaged warning buzzer
A buzzer will sound if the vehicle is driv en with the parking brake engaged. “Release
Parking Brake” is displayed on the multi-information display.■
Warning messages and buzzers
Warning messages and buzzers are used to indicate a system malfunction or to inform
the driver of the need for caution. If a warn ing message is shown on the multi-information
display, read the message and follow the instructions.■
If the brake system warning light comes on
 P. 654 ■
Usage in winter time
 P. 385
WARNING ■
When parking the vehicle
Do not leave a child in the vehicle alone. The parking brake may be released uninten-
tionally and there is the danger of the ve hicle moving that may lead to an accident
resulting in death or serious injury. ■
Parking brake switch
Do not set any objects near the parking br ake switch. Objects may interfere with the
switch and may lead the parking brake to unexpectedly operate.
NOTICE ■
When parking the vehicle
Before you leave the vehicle, shift the shif t lever to P, set the parking brake and make
sure that the vehicle does not move. ■
When the system malfunctions
Stop the vehicle in a safe place and check the warning messages.■
When the parking brake cannot be released due to a malfunction
Driving the vehicle with the parking brake se t will lead to brake components overheat-
ing, which may affect bra king performance and increase brake wear. Contact your
Lexus dealer immediately if this occurs.

250 4-2. Driving procedures
RX350/RX350L_U Turns the brake hold system on The brake hold standby indicator
(green) comes on. Wh ile the system is
holding the brakes, the brake hold oper-
ated indicator (yellow) will illuminate.
■
Brake hold system operating conditions
The brake hold system cannot be turn ed on in the following conditions:●
The driver’s door is not closed. ●
The driver’s seat seat belt is not buckled.
If either of the conditions above are detected when the brake hold system is enabled, the
system will turn off and the brake hold standby in dicator light will go off. In addition, if any
of the conditions are detected while the sy stem is holding the brakes, a warning buzzer
will sound and a message will be shown on th e multi-information di splay. The parking
brake will then be set automatically. ■
Brake hold function ●
If the brake pedal is left released for a pe riod of about 3 minutes after the system has
started holding the brakes, the parking brake will be set automatically. In this case, a
warning buzzer sounds and a message is shown on the multi- informatio n display.●
To turn the system off while the system is holding the brakes, firmly depress the brake
pedal and press the switch again. ●
The brake hold function may not hold the vehicle when the vehicle is on a steep incline.
In this situation, it may be necessary for the driver to apply the brakes. A warning
buzzer will sound and the mult i-information display will info rm the driver of this situa-
tion. If a warning message is shown on the multi-information display, read the message
and follow the instructions.Brake Hold 
Vehicles without paddle shift switches
The brake hold system keeps the brake appl ied when the shift lever is in D, S or
N with the system on and the brake peda l has been depressed to stop the vehi-
cle. The system releases the brake wh en the accelerator pedal is depressed
with the shift lever in D or S to allow smooth start off.
Vehicles with paddle shift switches
The brake hold system keeps the brake a pplied when the shift lever is in D, M
or N with the system on and the brake pedal has been depr essed to stop the
vehicle. The system releases the brake when the accelerator pedal is
depressed with the shif t lever in D or M to allow smooth start off.

2514-2. Driving procedures
4
Driving
RX350/RX350L_U ■
When the parking brake is set automatically while the system is holding the brakes
Perform any of the following operat ions to release the parking brake.●
Depress the accelerator pedal. (The parking brake will not be released automatically if
the seat belt is not fastened.) ●
Operate the parking brake switch with the brake pedal depressed.
Make sure that the parking brake indicator light goes off. (  P. 247) ■
When an inspection at your Lexus dealer is necessary
When the brake hold standby indicator (green) does not illu minate even when the brake
hold switch is pressed with the brake hold system operating conditions met, the system
may be malfunctioning. Ha ve the vehicle inspected at your Lexus dealer. ■
If “Brake Hold Fault Depress Brake to Deacti vate Visit Your Dealer” is displayed on the
multi-information display
The system may be malfunctioning. Have th e vehicle inspected by your Lexus dealer.■
Warning messages and buzzers
Warning messages and buzzers are used to indicate a system malfunction or to inform
the driver of the need for caution. If a warn ing message is shown on the multi-information
display, read the message and follow the instructions.■
If the brake hold operated indicator flashes
 P. 654
WARNING ■
When the vehicle is on a steep incline
When using the brake hold system on a steep incline exercise caution. The brake hold
function may not hold the vehicle in such a situation. ■
When stopped on a slippery road
The system cannot stop the vehicle when the gripping ability of the tires has been
exceeded. Do not use the system when stopped on a slippery road.
NOTICE ■
When parking the vehicle
The brake hold system is not designed for use when parking the vehicle for a long
period of time. Turning the engine switch off while the system is holding the brakes may
release the brakes, which would cause the ve hicle to move. When operating the engine
switch, depress the brake pedal, shift the shift lever to P and set the parking brake.

256 4-3. Operating the lights and wipers
RX350/RX350L_U Push the lever away from you with
the headlight switch in the or
position.
Press the Automatic High Beam
switch. The Automatic High Beam indicator will
come on when the system is operating.Automatic High Beam The Automatic High Beam uses a came ra sensor located behind the upper
portion of the windshield to assess the brightness of the lights of vehicles
ahead, streetlights, etc., and automatica lly turns the high beams on or off as
necessary. WARNING ■
Limitations of the Automatic High Beam
Do not overly rely on the Automatic High Beam. Always drive safely, taking care to
observe your surroundings and turning the hi gh beams on or off ma nually if necessary.■
To prevent incorrect operation of the Automatic High Beam system
Do not overload the vehicle.
Activating the Automatic High Beam 1
2

264 4-3. Operating the lights and wipers
RX350/RX350L_U ■
Front door opening linked windshield wiper stop function (vehicles with rain-sensing
windshield wipers)
When “AUTO” is selected and the windshield wipers are operating, if a front door is
opened, the operation of the windshield wipers will be stopped to prevent anyone near
the vehicle from being sprayed by water from the wipers, provided the vehicle is stopped
with the parking brake applied or the shift lever in P. When the front door is closed, wiper
operation will resume. ■
Customization
Some functions can be customized. (  P. 722)
WARNING ■
Caution regarding the use of windshield wi pers in AUTO mode (vehicles with rain-
sensing windshield wipers)
The windshield wipers may operate unexpectedly if the sensor is touched or the wind-
shield is subject to vibration in AUTO mode. Take care that your fingers, etc. do not
become caught in the windshield wipers. ■
Caution regarding the use of washer fluid
When it is cold, do not use the washer fl uid until the windshield becomes warm. The
fluid may freeze on the windshield and cause lo w visibility. This may lead to an accident,
resulting in death or serious injury.
NOTICE ■
When the windshield is dry
Do not use the wipers, as they may damage the windshield. ■
When the washer fluid tank is empty
Do not operate the switch continually as the washer fluid pump may overheat. ■
When a nozzle becomes blocked
In this case, contact your Lexus dealer.
Do not try to clear it with a pin or other object. The nozz le will be damaged.

270 4-4. Refueling
RX350/RX350L_U WARNING ■
When refueling the vehicle
Observe the following precautions while refueling the vehicle. Failure to do so may
result in death or serious injury. ●
After exiting the vehicle and before opening the fuel door, touch an unpainted metal
surface to discharge any static electricity. It is important to discha rge static electricity
before refueling because sparks resulting fr om static electricity can cause fuel vapors
to ignite while refueling. ●
Always hold the grips on the fuel tank cap and turn it slowly to remove it.
A whooshing sound may be heard when the fu el tank cap is loosened. Wait until the
sound cannot be heard before fully removing the cap. In hot weather, pressurized fuel
may spray out of the filler neck and cause injury.●
Do not allow anyone that has not discharged static electricity from their body to come
close to an open fuel tank. ●
Do not inhale vaporized fuel.
Fuel contains substances th at are harmful if inhaled.●
Do not smoke while refueling the vehicle.
Doing so may cause the fuel to ignite and cause a fire. ●
Do not return to the vehicle or touch any pe rson or object that is statically charged.
This may cause static electricity to build up, resulting in a possible ignition hazard.■
When refueling
Observe the following precautions to prevent fuel overflowing from the fuel tank: ●
Securely insert the fuel nozz le into the fuel filler neck.●
Stop filling the tank after the fuel nozzle automatically clicks off.●
Do not top off the fuel tank.
NOTICE ■
Refueling
Do not spill fuel during refueling.
Doing so may damage the vehicle, such as causing the emission control system to
operate abnormally or damaging fuel system components or the vehicle’s painted sur-
face.

2734-4. Refueling
4
Driving
RX350/RX350L_U After refueling, turn the fuel tank cap
until you hear a click. Once the cap
is released, it will turn slightly in the
opposite direction.
Close the fuel filler door, and press
the center of the rear edge of the
fuel filler door. When you lock the doors, the fuel filler
door will lock also. ■
Fuel filler door lock condition
The fuel filler door may not be locked even when the vehicle’ s doors are locked in the fol-
lowing conditions: ●
When operating the door lock button inside the vehicle●
When the automatic door lock ing system is operated (  P. 127)●
When the fuel filler door is closed after the vehicle’s doors are lockedClosing the fuel tank cap 1
2
WARNING ■
When replacing the fuel tank cap
Do not use anything but a genuine Lexus fuel tank cap designed for your vehicle. Doing
so may cause a fire or other incident whic h may result in death or serious injury.

274
RX350/RX350L_U 4-5. Using the driving support systems
◆ PCS (Pre-Collision System)
 P. 281
◆ LKA (Lane-Keeping Assist)
 P. 291
◆ Automatic High Beam
 P. 256
◆ Dynamic radar cruise contro l with full-speed range
 P. 300Lexus Safety System+ The Lexus Safety System+ consists of the following drive assist systems and
contributes to a safe and comfo rtable driving experience:
WARNING ■
Lexus Safety System+
The Lexus Safety System+ is designed to operate under the assumption that the driver
will drive safely, and is design ed to help reduce the impa ct to the occupants and the
vehicle in the case of a collision or assist the driver in normal driving conditions.
As there is a limit to the degree of reco gnition accuracy and control performance that
this system can provide, do not overly rely on this system. The driver is always responsi-
ble for paying attention to the vehicl e's surroundings and driving safely.

276 4-5. Using the driving support systems
RX350/RX350L_U Two types of sensors, located behind the front grille and windsh ield, detect infor-
mation necessary to operate the drive assist systems.
Radar sensor
Camera sensorSensors 1
2
WARNING ■
To avoid malfunction of the radar sensor
Observe the following precautions.
Otherwise, the radar sensor may not operat e properly, possibly leading to an accident
resulting in death or serious injury. ●
Keep the radar sensor and front grille emblem clean at all times.
●
Do not attach accessories, stickers (includi ng transparent sticke rs) or other items to
the radar sensor, front grille emblem or surrounding area. ●
Do not subject the radar sensor or su rrounding area to a strong impact.
If the radar sensor, front grille, or front bumper has been subjected to a strong impact,
have the vehicle inspected by your Lexus dealer. ●
Do not disassemble the radar sensor. ●
Do not modify or paint the radar sensor, front grille emblem or surrounding area. ●
If the radar sensor, front grille, or front bumper needs to be removed and installed, or
replaced, contact your Lexus dealer. Radar sensor
Front grille emblem
If the front of the rada r sensor or the front or
back of the front grille emblem is dirty or
covered with water droplets, snow, etc., clean
it.
Clean the radar sensor and front grille
emblem with a soft cloth so you do not mark
or damage them. 1
2