Page 250 of 660

2504-2. 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 auto matically. With the brake pedal depressed,
release the parking brake by operating the pa rking brake switch, making sure that the
parking brake indicator light goes off. ( P. 245)
■If “Brake Hold Fault Depress Brake to Deacti vate Visit Your Dealer” is displayed on the
multi-information display
The system may be malfunctio ning. 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. 536
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 power switch off 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.
Page 269 of 660

2694-4. Refueling
4
Driving
RX450h_U_OM0E013U
Press the switch to open the fuel
filler door.
The fuel filler door will open within about
10 seconds of the sw itch being pressed.
Before refueling is possible, a message
will be shown on the multi-information
display in the instrument cluster to indi-
cate the progress of the fuel filler door
opener.
Turn the fuel tank cap slowly and
remove it, then put it into the holder
on the fuel filler door.
■When the fuel filler door cannot be opened by pressing the inside switch
Opening the fuel tank cap
1
2
●If the fuel filler door opener switch cannot be
operated, contact your Lexus dealer to service
the vehicle. In case where refueling is urgently
necessary, the fuel filler door can be opened
using the lever in th e luggage compartment.
●Using the lever to open the fuel filler door may
not allow for an adequate reduction in fuel
tank pressure before refueling. To prevent fuel
from spilling out, turn the cap slowly when
removing it.
During refueling, fuel may spill out from the
filler opening due to ai r being discharged from
inside the fuel tank. Therefore, fill the fuel tank
carefully and slowly.
Page 280 of 660

2804-5. Using the driving support systems
RX450h_U_OM0E013U
◆Pre-collision warning
When the system determines that
the possibility of a frontal collision is
high, a buzzer will sound and a warn-
ing message will be displayed on the
multi-information display to urge the
driver to take evasive action.
◆Pre-collision brake assist
When the system determines that the po ssibility of a frontal collision is high,
the system applies greater braking force in relation to how strongly the brake
pedal is depressed.
◆Pre-collision braking*3
When the system determines that the po ssibility of a frontal collision is high,
the system warns the driver. If the syst em determines that the possibility of a
collision is extremely high, the brakes ar e automatically applied to help avoid
the collision or reduce the collision speed.
*3: Depending on the region in which the vehi cle was sold, the pre-collision braking func-
tion may not be available.
◆Suspension control (if equipped)
When the system determines that the po ssibility of a frontal collision is high,
the Adaptive Variable Suspension System ( P. 382) will control the damping
force of the shock absorbers.
Page 283 of 660
2834-5. Using the driving support systems
4
Driving
RX450h_U_OM0E013U
■Enabling/disabling the pre-collision system
The pre-collision system can be enabled/disabled on (P. 109) of the
multi-information display.
The system is automatically enabled each time the power switch is turned to ON
mode.
If the system is disabled, the PCS
warning light will turn on and a mes-
sage will be displayed on the multi-
information display.
■Changing the pre-collision warning timing
The pre-collision warning timing can be changed on ( P. 109) of the
multi-information display.
The operation timing settin g is retained when the power switch is turned off.
Far
The warning will begin to operate
earlier than with the default timing.
Middle
This is the default setting.
Near
The warning will begin to operate
later than with the default timing.
Changing settings of the pre-collision system
1
2
3
Page 291 of 660

2914-5. Using the driving support systems
4
Driving
RX450h_U_OM0E013U
■If the PCS warning light flashes and a warning message is displayed on the multi-infor-
mation display
The pre-collision system may be temporarily unavailable or there may be a malfunction
in the system.
●In the following situations, the warning light will turn off, the message will disappear and
the system will become operational when normal operating conditions return:
• When the radar sensor or ca mera sensor or the area around either sensor is hot,
such as in the sun
• When the radar sensor or camera sensor or the area around either sensor is cold,
such as in an extremely cold environment
• When the radar sensor or front grille embl em is dirty or covered with snow, etc.
• If the camera sensor is obstructed, such as when the hood is open or a sticker is
attached to the windshield near the camera sensor
●If the PCS warning light continues to flash or the warning message does not disappear,
the system may be malfunctioning. Have the vehicle inspected by your Lexus dealer
immediately.
■If VSC is disabled
●If VSC is disabled ( P. 384), the pre-collision brake assist and pre-collision braking
functions are also disabled.
●The PCS warning light will turn on and “V SC Turned Off Pre-Collision Brake System
Unavailable” will be displayed on the multi-information display.
Page 293 of 660

2934-5. Using the driving support systems
4
Driving
RX450h_U_OM0E013U
◆Lane departure alert function
When the system determines that
the vehicle might depart from its
lane, a warning is displayed on the
multi-information display, and either
the warning buzzer sounds or the
steering wheel vibrates to alert the
driver.
When the warning buzzer sounds or
the steering wheel vibrates, check
the surrounding road situation and
carefully operate the steering wheel
to move the vehicle back to the cen-
ter within the white (yellow) lines.
◆Steering assist function
When the system determines that
the vehicle might depart from its
lane, the system provides assistance
as necessary by operating the steer-
ing wheel in small amounts for a
short period of time to keep the
vehicle in its lane.
If the system detects that the steering
wheel has not been operated for a
fixed amount of time or the steering
wheel is not being firmly gripped, a
warning is displayed on the multi-
information display and the warning
buzzer sounds.
Functions included in LKA system
Page 294 of 660
2944-5. Using the driving support systems
RX450h_U_OM0E013U
◆Vehicle sway warning
When the vehicle is swaying or
appears as if it may depart from its
lane multiple times, the warning
buzzer sounds and a message is dis-
played on the multi-information dis-
play to alert the driver.
◆Lane centering function
This function is linked with radar
cruise control and provides the
required assistance by operating the
steering wheel to keep the vehicle in
its current lane.
When radar cruise control is not
operating, the lane centering func-
tion does not operate.
If the system detects that the steering
wheel has not been operated for a
fixed amount of time or the steering
wheel is not being firmly gripped, a
warning is displayed on the multi-
information display and the warning
buzzer sounds.
Page 296 of 660
2964-5. Using the driving support systems
RX450h_U_OM0E013U
Press the LKA switch to turn the LKA
system on.
The LKA indicator illuminates and a
message is displayed on the multi-infor-
mation display.
Press the LKA switch again to turn the
LKA system off.
When the LKA system is turned on or
off, operation of the LKA system contin-
ues in the same cond ition the next time
the hybrid system is started.
Turning LKA system on