LEXUS RX450h 2015 Owners Manual

8206-1. Specifications
Tire related term Meaning
Occupant distribution Distribution of occupants in a vehicle as specified in
the third column of Table 1
* below
Production options
weight The combined weight of installed regular production
options weighing over 5 lb. (2.3 kg) in excess of the
standard items which they replace, not previously
considered in curb weight or accessory weight,
including heavy duty brakes, ride levelers, roof rack,
heavy duty 12-volt battery, and special trim
Rim A metal support for a tire or a tire and tube assembly
upon which the tire beads are seated
Rim diameter
(Wheel diameter) Nominal diameter of the bead seat
Rim size designation Rim diameter and width
Rim type designation The industry manufacturer's designation for a rim by
style or code
Rim width Nominal distance between rim flanges
Vehicle capacity weight
(Total load capacity) The rated cargo and luggage load plus 150 lb. (68
kg) times the vehicle's designated seating capacity
Vehicle maximum load on
the tire The load on an individual tire that is determined by
distributing to each axle its share of the maximum
loaded vehicle weight, and dividing by two
Vehicle normal load on
the tire The load on an individual tire that is determined by
distributing to each axle its share of curb weight,
accessory weight, and normal occupant weight (dis-
tributed in accordance with Table 1
* below), and
dividing by two
We a t h e r s i d e The surface area of the rim not covered by the
inflated tire

8216-1. Specifications
6
Vehicle specifications Tire related term Meaning
Bead The part of the tire that is made of steel wires,
wrapped or reinforced by ply cords and that is
shaped to fit the rim
Bead separation A breakdown of the bond between components in
the bead
Bias ply tire A pneumatic tire in which the ply cords that extend to
the beads are laid at alternate angles substantially
less than 90 degrees to the centerline of the tread
Carcass The tire structure, except tread and sidewall rubber
which, when inflated, bears the load
Chunking The breaking away of pieces of the tread or sidewall
Cord The strands forming the plies in the tire
Cord separation The parting of cords from adjacent rubber com-
pounds
Cracking Any parting within the tread, sidewall, or innerliner of
the tire extending to cord material
CT A pneumatic tire with an inverted flange tire and rim
system in which the rim is designed with rim flanges
pointed radially inward and the tire is designed to fit
on the underside of the rim in a manner that encloses
the rim flanges inside the air cavity of the tire
Extra load tire A tire designed to operate at higher loads and at
higher inflation pressures than the corresponding
standard tire
Groove The space between two adjacent tread ribs
Innerliner The layer(s) forming the inside surface of a tubeless
tire that contains the inflating medium within the tire
Innerliner separation The parting of the innerliner from cord material in the
carcass

8226-1. Specifications
Tire related term Meaning
Intended outboard side-
wall (a) The sidewall that contains a whitewall, bears
white lettering, or bear s manufacturer, brand,
and/or model name molding that is higher or
deeper than the same molding on the other side-
wall of the tire, or
(b) The outward facing sidewall of an asymmetrical
tire that has a particular side that must always
face outward when mounted on a vehicle
Light truck (LT) tire A tire designated by its manufacturer as primarily
intended for use on lightweight trucks or multipur-
pose passenger vehicles
Load rating The maximum load that a tire is rated to carry for a
given inflation pressure
Maximum load rating The load rating for a tire at the maximum permissible
inflation pressure for that tire
Maximum permissible
inflation pressure The maximum cold inflation pressure to which a tire
may be inflated
Measuring rim The rim on which a tire is fitted for physical dimension
requirements
Open splice Any parting at any junction of tread, sidewall, or
innerliner that extends to cord material
Outer diameter The overall diameter of an inflated new tire
Overall width The linear distance between the exteriors of the side-
walls of an inflated tire, including elevations due to
labeling, decorations, or protective bands or ribs
Passenger car tire A tire intended for use on passenger cars, multipur-
pose passenger vehicles, and trucks, that have a
gross vehicle weight rating (GVWR) of 10,000 lb. or
less.
Ply A layer of rubber-coated parallel cords

8236-1. Specifications
6
Vehicle specifications Tire related term Meaning
Ply separation A parting of rubber comp ound between adjacent
plies
Pneumatic tire A mechanical device made of rubber, chemicals, fab-
ric and steel or other mate rials, that, when mounted
on an automotive wheel, provides the traction and
contains the gas or fluid that sustains the load
Radial ply tire A pneumatic tire in which the ply cords that extend to
the beads are laid at substantially 90 degrees to the
centerline of the tread
Reinforced tire A tire designed to operate at higher loads and at
higher inflation pressures than the corresponding
standard tire
Section width The linear distance between the exteriors of the side-
walls of an inflated tire, excluding elevations due to
labeling, decoration, or protective bands
Sidewall That portion of a tire between the tread and bead
Sidewall separation The parting of the rubber compound from the cord
material in the sidewall
Snow tire A tire that attains a traction index equal to or greater
than 110, compared to the ASTM E-1136 Standard
Reference Test Tire, when using the snow traction test
as described in ASTM F-1805-00, Standard Test
Method for Single Wheel Driving Traction in a
Straight Line on Snow-and Ice-Covered Surfaces,
and which is marked with an Alpine Symbol (
)
on at least one sidewall
Te s t r i m The rim on which a tire is fitted for testing, and may be
any rim listed as appropriate for use with that tire

8246-1. Specifications
* :Table 1  Occupant loading and distributi on for vehicle normal load for
various designated seating capacities Tire related term Meaning
Tr e a d That portion of a tire that comes into contact with the
road
Tr e a d r i b A tread section running circumferentially around a
tire
Tr e a d s e p a r a t i o n Pulling away of the tread from the tire carcass
Treadwear indicators
(TWI) The projections within the principal grooves
designed to give a visual indication of the degrees of
wear of the tread
Wheel-holding fixture The fixture used to hold the wheel and tire assembly
securely during testing
Designated seating
capacity,
Number of occupants Vehicle normal load,
Number of occupants Occupant distribution in
a normally loaded vehicle
2 through 4 2 2 in front
5 through 10 3 2 in front, 1 in second seat
11 through 15 5 2 in front, 1 in second
seat, 1 in third seat, 1 in
fourth seat
16 through 20 7 2 in front, 2 in second
seat, 2 in third seat, 1 in
fourth seat

8256
Vehicle specifications 6-2. Customization
Customizable features
Customizing vehicle features
It is possible to customize certain ve hicle features using the multi-infor-
mation switches. *
*: For instructions on customizing vehicle features using the navigation
system screen, refer to the “Navigation System Owner’s Manual”.
For instructions on customizing vehi cle features using the Display
Audio system screen:  P. 3 3 7
When customizing vehicle features, ensu re that the vehicle is parked in a
safe place with the shift lever in P and the parking brake set.
Press and hold the menu switch of
the multi-information switches to
display customize mode.Your vehicle includes a variety of elec tronic features that can be personal-
ized to suit your preferences. Programming of these preferences can be
performed by your Lexus dealer.
It is also possible to customize certain vehicle features yourself using the
multi-information switches, the navigation system screen or the Display
Audio system screen.
Some function settings are changed simultaneously with other functions
being customized. Contact your Lexus dealer for further details.
STEP 1

8266-2. Customization
Press the “  ” or “  ” switch to
select the item to be custom-
ized.
Press the “ENTER” switch to
confirm.
Press the “  ” or “  ” switch to
select the desired setting for the
item being customized.
Press the “ENTER” switch to
confirm.
When customization is completed, pr ess the menu switch to clear the
customization screen.
Customizable Features
Vehicles with a Display Audio sys tem: Settings that can be changed
using the Display Audio system
Vehicles with a Display Audio sys tem: Settings that can be changed
using the multi-information switches
Vehicles with a navigation system: Settings that can be changed using
the screen of the navigation system
Vehicles with a navigation system: Settings that can be changed using
the multi-information switches
Vehicles without a Display Audio system and navigation system: Set-
tings that can be changed using the multi-information switches
Settings that can be changed by your Lexus dealer
Definition of symbols: O = Available, —
= Not availableSTEP 2
STEP 3

8276-2. Customization
6
Vehicle specifications Door lock ( 
P. 7 2 , 7 8 1 )Function Default
setting Custom-
ized
setting
Unlocking using a
key Driver's
door
unlocked
in one step,
all doors
unlocked
in two
steps All doors
unlocked
in one step — —
O — —
O
Speed-detecting
automatic door lock
function Off On O —
O —
O O
Shifting gears to
position other than
P locks all doors On Off O —
O —
O O
Shifting gears to P
unlocks all doors On Off O —
O —
O O
Opening driver's
door unlocks all
doors Off On O —
O —
O O

8286-2. Customization
Smart access system with push-button start and wireless remote control
( 
P. 56, 69) Function Default
setting Custom-
ized
setting
Operation buzzer
volume Level 7 Off to level
6 O —
O —
O O
Operation signal
(buzzer) On Off O —
O —
O O
Operation signal
(emergency flash-
ers) On Off O —
O —
O O
Open door warning
buzzer On Off — — — — —
O
Time elapsed before
the automatic door
lock function is acti-
vated if a door is not
opened after being
unlocked 60 sec-
onds Off
O —
O —
O O30 sec-
onds
120 sec-
onds
Smart door unlock-
ing Driver’s
door All the
doors O —
O —
O O
Smart access sys-
tem with push-but-
ton start On Off O —
O —
O O

8296-2. Customization
6
Vehicle specifications Power back door ( 
P. 7 5 )
Wireless remote control ( 
P. 6 9 )Function Default
setting Custom-
ized
setting
Power back door
opening operation
using the back door
opener button On Off — — — — —
O
Function Default
setting Custom-
ized
setting
Unlocking opera-
tion Driver's
door
unlocked
in one step,
all doors
unlocked
in two
steps All doors
unlocked
in one step O —
O —
O O
Pa n i c f u n c t i o n On Off — — — — —
O