2016 LEXUS RX450H brake

2474-2. Driving procedures
4
Driving
RX450h_U_OM0E013U ■
Parking brake operation sound
When the parking brake operates, a motor sound (whirring sound) may be heard. This
does not indicate a malfunction. ■
Parking brake indicator light and parking brake lamp ●
Depending on the power switch mode, the parking brake indicator light and parking
brake lamp will turn on and stay on as described below:
ON mode: Comes on until the parking brake is released.
Not in ON mode: Stays on for approximately 15 seconds. ●
When the power switch is turned off with th e parking brake set, the parking brake indi-
cator light and parking brake lamp 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 driven 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. 5 3 6 ■
Usage in winter time
 P. 3 9 1

248 4-2. Driving procedures
RX450h_U_OM0E013U WA R N I N G ■
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 vehicle moving that may lead to an accident
resulting in death or serious injury.
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 set will lead to brake components overheat-
ing, which may affect braking performance and increase brake wear. Contact your
Lexus dealer immediately if this occurs.

2494-2. Driving procedures
4
Driving
RX450h_U_OM0E013U Turns the brake hold system on The brake hold standby indicator
(green) comes on. While the system is
holding the brake, the brake hold oper-
ated indicator (yellow) comes on. ■
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 is not wearing the seat belt.
If any 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 of f. In addition, if any
of the conditions are detected while the sy stem is holding the brake, a warning buzzer
will sound and a message will be shown on th e multi-information display. The parking
brake will then be set automatically. ■
Brake hold function ●
If the brake pedal is left released for a period of about 3 minutes after the system has
started holding the brake, the parking brake w ill be set automatically. In this case, a
warning buzzer sounds and a message is shown on the multi-information display.●
To turn the system off while the system is holding the brake, firmly depress the brake
pedal and press the button 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 fo r the driver to apply the brakes. A warning
buzzer will sound and the multi-information di splay will inform the dr iver of this situa-
tion. If a warning message is shown on the multi-information displa y, re a d t h e m e s s a g e
and follow the instructions.Brake Hold The brake hold system keeps the brake applied when the shift lever is in D, S or
N with the system on and the brake pedal has been depressed to stop the vehi-
cle. The system releases the brake when the accelerator pedal is depressed
with the shift lever in D or S to allow smooth start off.

250 4-2. Driving procedures
RX450h_U_OM0E013U ■
When the parking brake is set automatically while the system is holding the brakes
The parking brake will not be released automatically. With the brake pedal depressed,
release the parking brake by operating the parking brake switch, making sure that the
parking brake indicator light goes off. (  P. 2 4 5 )■
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 the vehicle inspected by your Lexus dealer
immediately. ■
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. 5 3 6
WA R N I N G ■
When the vehicle is on a steep incline
When using the brake hold system on a stee p 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 power switch of f while the system is holding the brake may
release the brake, which would cause the vehicle to move. When operating the power
switch, depress the brake pedal, shift the shift lever to P and set the parking brake.

2534-3. Operating the lights and wipers
4
Driving
RX450h_U_OM0E013U ■
Daytime running light system ●
To make your vehicle more visible to other drivers during daytime driving, the daytime
running lights turn on automatically whenever the hybrid system is started and the park-
ing brake is released with the headligh t switch in (Canada only) or posi-
tion. (Illuminate brighter than the par king lights.) Daytime running lights are not
designed for use at night.
For the U.S.A.: Daytime running lights can be turned off by operating the headlight
switch to position. ●
Compared to turning on the headlights, the daytime running light system offers greater
durability and consumes less electricity, so it can help improve fuel economy. ■
Cornering lights (if equipped)
When the cornering lights are on for more th an 30 minutes, they will turn off automati-
cally. ■
Headlight control sensor
■
Automatic light off system ●
When the headlights come on: The headlights and tail lights turn off 30 seconds after a
door is opened and closed if the power switch is turned to ACCESSORY mode or
turned off. (The lights turn off immediately if on the key is pressed after all the doors
are locked.) ●
When only the tail lights come on: The tail lights turn off automatically if the power
switch is turned to ACCESSORY mode or turned off and the driver’s door is opened.
To turn the lights on again, turn the power switch to ON mode, or turn the light switch off
once and then back to or . ■
Automatic headlight leveling system (if equipped)
The level of the headlights is automatically ad justed according to the number of passen-
gers and the loading condition of the vehicle to ensure that the headlights do not inter-
fere with other road users. ■
Light reminder buzzer
A buzzer sounds when the power switch is turned off or turned to ACCESSORY mode
and the driver’s door is opened while the lights are turned on. ■
We l c o m e l i g h t i n g
If the headlight switch is turned to and the surrounding area is dark, unlocking the
doors using the smart access system with pu sh-button start or wireless remote control
will turn the parking lights and tail lights on automatically.The sensor may not function properly if an
object is placed on the sensor, or anything that
blocks the sensor is affixed to the windshield.
Doing so interferes with the sensor detecting
the level of ambient light and may cause the
automatic headlight system to malfunction.

262 4-3. Operating the lights and wipers
RX450h_U_OM0E013U ■
Front door opening linked windshield wiper stop function
When “AUTO” is selected and the windshield wipers are operating, if a front door is
opened, the operation of the windshield wipe rs 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 th e front door is closed, wiper
operation will resume. ■
Customization
Some functions can be customized. (  P. 6 0 7 )
WA R N I N G ■
Caution regarding the use of windshield wipers in AUTO mode
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 fluid 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 nozzle will be damaged.

272 4-5. Using the driving support systems
RX450h_U_OM0E013U The pre-collision system is equipped wi th a sophisticated computer that will
record certain data, such as:
• Accelerator status
•Brake status
• Vehicle speed
• Operation status of the pre-collision system functions
• Information (such as the distance and relative speed between your vehicle
and the vehicle ahead or other objects)
Additionally, if the pre-collision braking fu nction is operating, image information
from the camera sensor will also be re corded. The pre-collisio n system does not
record conversations, sounds or pictures. ●
Data usage
Lexus may use the data recorded in this computer to diagnose malfunctions,
conduct research and development, and improve quality.
Lexus will not disclose the recorded data to a third party except:
• With the consent of the vehicle owner or with the consent of the lessee if
the vehicle is leased
• In response to an official request by the police, a court of law or a govern-
ment agency
• For use by Lexus in a lawsuit
• For research purposes where the data is not tied to a specific vehicle or
vehicle owner●
Recorded image information can be erased using a specialized device.
The image information recording function can be disabled. However, if the
function is disabled, data from when the pre-collision system operates will not
be available.Vehicle data recording

2794-5. Using the driving support systems
4
Driving
RX450h_U_OM0E013UPCS (Pre-Collision System) 
 : If equippedThe pre-collision system uses a radar sensor and camera sensor to detect
vehicles and pedestrians
* 1
in front of your vehicle. When the system deter-
mines that the possibility of a frontal collision with a vehicle or pedestrian is
high, a warning operates to urge the driver to take evasive action and the
potential brake pressure is increased to help the driver avoid the collision. If
the system determines that th e possibility of a frontal collision with a vehicle or
pedestrian is extremely high, the brakes are automatically applied
* 2
to help
avoid the collision or help reduce the impact to the vehicle occupants and the
vehicle in the collision.
The pre-collision system can be disabl ed/enabled and the warning timing can
be changed. (  P. 2 8 3 )
* 1
: Depending on the region in which the vehicle was sold, the pedestrian detection
function may not be available. Contact your Lexus dealer for details.
* 2
: Depending on the region in which the ve hicle was sold, the pre-collision braking
function (automatic braking function) may not be available. Contact your Lexus
dealer for details.