2018 LEXUS RX450h ESP

3954-6. Driving tips
4
Driving
RX450h_RX450hL _U_OM48F85UYour vehicle is not designed to be driv en off-road. However, in the event that
off-road driving cannot be avoided, please observe the following precautions to
help avoid the areas prohibited to vehicles. ●
Drive your vehicle only in areas wher e off-road vehicles are permitted to
travel. ●
Respect private property. Get owner’s permission before entering private
property. ●
Do not enter areas that are closed. Honor gates, barriers and signs that
restrict travel. ●
Stay on established road s. When conditions are wet, driving techniques
should be changed or travel dela yed to prevent damage to roads.●
Avoid driving on very steep, slippery ro ads and other surfaces, such as sand,
where the tires are liable to lose tractio n. Your vehicle may not perform as well
as conventional AWD on-road vehicles on these surfaces. ■
Additional information for off-road driving
For owners in U.S. mainland, Hawaii and Puerto Rico:
To obtain additional information pertaining to driving your vehicle off-road, consult the
following organizations. ●
State and Local Parks and Recreation Departments ●
State Motor Vehicle Bureau ●
Recreational Vehicle Clubs ●
U.S. Forest Service and Bu reau of Land ManagementOff-road driving

396 4-6. Driving tips
RX450h_RX450hL _U_OM48F85U [
WARNING ■
Off-road driving precautions
Always observe the following precautions to minimize the risk of death, serious injury
or damage to your vehicle: ●
Drive carefully when off the road. Do not ta ke unnecessary risks by driving in danger-
ous places. ●
Do not grip the steering wheel spokes when driving off-road. A bad bump could jerk
the wheel and injure your hands. Keep both hands and especially your thumbs on the
outside of the rim. ●
Always check your brakes for effectiveness immediately after driving in sand, mud,
water or snow. ●
After driving through tall grass, mud, rock , sand, rivers, etc., check that there is no
grass, bush, paper, rags, stone, sand, etc. adhering or trapped on the underbody.
Clear off any such matter from the underbody. If the vehicle is used with these materi-
als trapped or adhering to the underbody, a breakdown or fire could occur. ●
When driving off-road or in rugged terrain , do not drive at excessive speeds, jump,
make sharp turns, strike obje cts, etc. This may cause loss of control or vehicle rollover
causing death or serious injury. You are also risking expensive damage to your vehi-
cle’s suspension and chassis.
NOTICE ■
To prevent water damage
Take all necessary safety measures to ensure that water damage to the hybrid battery
(traction battery), hybrid system or other components does not occur.●
Water entering the engine compartment may cause severe damage to the hybrid
system. Water entering the interior may cause the hybrid battery (traction battery)
stowed under the rear seats to short circuit.●
Water entering the hybrid transmission and rear electric motor (traction motor) will
cause deterioration in transmission qualit y. The malfunction indicator may come on,
and the vehicle may not be drivable. ●
Water can wash the grease from wheel be arings, causing rusting and premature fail-
ure, and may also enter the hybrid transmissi on case, reducing the gear oil’s lubricat-
ing qualities. ■
When you drive through water
If driving through water, such as when cro ssing shallow streams, first check the depth of
the water and the bottom of the riverbed for firmness. Drive slowly and avoid deep
water. ■
Inspection after off-road driving ●
Sand and mud that has accumulated around brake discs may affect braking efficiency
and may damage brake system components. ●
Always perform a maintenance inspection afte r each day of off-road driving that has
taken you through rough terrain, sand, mud, or water. For scheduled maintenance
information, refer to the “Warranty and Services Guide/Owner’s Manual Supple-
ment/Scheduled Maintenance”.

4075-1. Basic Operations
5
Lexus Display Audio system
RX450h_RX450hL _U_OM48F85UPress and hold the off hook switch
until you hear the beeps that indicate
the system is listening.
The Mobile Assistant can be used
only when the neighboring screen is
displayed. To cancel the Mobile Assistant, select
“Cancel”, or press and hold the off hook
switch.
To restart the Mobile Assistant for addi-
tional commands, press the off hook
switch. Mobile Assistant can only be
restarted after the sy stem responds to a
voice command. After some phone and
music commands, the Mobile Assistant
feature will automatically end to com-
plete the requested action.Mobile Assistant The Mobile Assistant feature will activate Apple’s Siri 
Eyes Free mode via
the steering wheel switches. To operat e the Mobile Assistant, a compatible
cellular phone must be registered and connected to this system via
Bluetooth 
. ( → P. 449) 1
2

414 5-2. Setup
RX450h_RX450hL _U_OM48F85UGo to “Customize Images”: “MENU” button → “Setup” → “General” →
“Customize Images”
Select “Set Images” and then select the desired image.
Set as startup image.
Set as screen off image.
Set as startup image and screen
off image.■
Adding an image
Connect a USB memory device. ( → P. 409)
Select “Copy from USB” on the “Customize Images” screen and then
select the desired image.
Move the controller to the left and then select “Copy”. Up to 10 images can be downloaded.■
Deleting images
Select “Delete Images” on the “Customize Images” screen and then select the
desired images. ■
USB memory
When saving the images to a USB memory de vice, name the folder that the images are
saved to “Image”. ●
Compatible device formats
The following device format can be used:
• USB communication format: USB2.0 FS (480 Mbps)
• File system format: FAT16/32 (Windows)
• Correspondence class: Mass storage class
The following types of files can be used:
• The image’s file fo rmat must be JPEG.
• The file name may only contain ASCII characters.●
JPEG file compatibility
Compatible image size: Maximum 5MBCustomizing images 1
2
1
2
3
1
2
3

4455-6. Using an external device
5
Lexus Display Audio system
RX450h_RX450hL _U_OM48F85U■
USB memory functions ●
Depending on the USB memory device that is connected to the system, the device
itself may not be operable and certain functions may not be available. If the device is
inoperable or a function is unavailable due to a malfunction (as opposed to a system
specification), disconnecting the device an d reconnecting it may resolve the problem.●
If the USB memory device still does not begin operation after being disconnected and
reconnected, format the device. ■
Error messages for USB memory
If the following error messages appear on th e screen, refer to the table and take the
appropriate measures. If the pr oblem is not rectified, take the vehicle to your Lexus
dealer.
■
USB memory ●
Compatible devices
USB memory devices that can be used for MP3, WMA and AAC playback. ●
Compatible device formats
The following device format can be used:
• USB communication format: USB2.0 FS (480 Mbps)
• File system format: FAT16/32 (Windows)
• Correspondence class: Mass storage class
MP3, WMA and AAC files written to a devi ce with any format other than those
listed above may not play correctly, and their file names and folder names may not
be displayed correctly.
Items related to standards an d limitations are as follows:
• Maximum directory hierarchy: 8 levels
• Maximum number of folders in a device: 3000 (including the root)
• Maximum number of files in a device: 9999
• Maximum number of files per folder: 255 Message Cause/Correction procedures
“Connection error. Please con-
sult your Owner’s Manual for
instructions on how to connect
the USB device.” This indicates a problem with the USB memory
device or its connection.
“There are no files available for
playback. Please add compati-
ble files to your USB device.” This indicates that no MP3/WMA/AAC files are
included on the USB memory device.

4835-11. Bluetooth ®
5
Lexus Display Audio system
RX450h_RX450hL _U_OM48F85U■
Bluetooth ®
antenna
The antenna is built into the display.
If the portable audio player is behind the se at or in the glove box or console box, or is
touching or covered by metal objects, the connection status may deteriorate.
If the cellular phone is behind the seat or in the console box, or touching or covered by
metal objects, the connection status may deteriorate. ■
Battery charge/signal status ●
This display may not correspond exactly wi th the portable audio player or cellular
phone itself. ●
This system does not have a charging function. ●
The portable audio player or cellular phone battery will be deplet ed quickly when the
device is connected to Bluetooth ®
.■
When using the Bluetooth ®
audio and hands-free system at the same time
The following problems may occur. ●
The Bluetooth ®
audio connection may be interrupted.●
Noise may be heard during Bluetooth ®
audio playback.■
About the contact in this system
The following data is stored for every registered cellular phone. When another phone is
connecting, you cannot read the registered data. ●
Contact data ●
Call history ●
Favorite ●
Message
When removing a Bluetooth ®
phone from the system, the above-mentioned data is also
deleted. ■
About Bluetooth ®

4915-12. Other function
5
Lexus Display Audio system
RX450h_RX450hL _U_OM48F85U■
USB memory functions
→ P. 445 ■
USB memory ●
Compatible devices
USB memory device that can be used for JPEG display.●
Compatible device formats
The following device format can be used:
• USB communication format: USB2.0 FS (480 Mbps)
• File system format: FAT16/32 (Windows)
• Correspondence class: Mass storage class●
JPEG file compatibility
• Compatible image size: Maximum 10MB
• Compatible pixel size: Maximum 10,000,000 pixels
NOTICE ■
To prevent damage to the USB me mory device or its terminals
→ P. 447

4935-12. Other function
5
Lexus Display Audio system
RX450h_RX450hL _U_OM48F85UPress the talk switch. To cancel the voice command system,
press and hold the talk switch.
After a beep sounds, say the desired
command. On the list screen, you can select the
desired command.
■
Menu screen
To display the menu screen, m ove the controller to the left.Voice command system The voice command system enables the audio and hands-free systems to be
operated using voice commands.
Operations of the voice command system can be performed by selecting the
menu corresponding to each function on the right part of the screen. Even if
any menu is selected, commands displayed on all menus can be operated.
Using the voice command system 1
2 
“Hints” screen 
Except “Hints” screen
Offer examples of commands and operation methods
Adjust the settings for voice guidance volume and voice recognition
prompts. Select to train voice recognition. (“Hints” screen) ( → P. 416)
Start over voice recognition (except “Hints” screen)
Cancel voice recognition 1
2
3
4