2014 Lexus IS250C ESP

438
4-3. Do-it-yourself maintenance
IS250C/350C_U
■When the initialization of the tire pressure warning system has failed
Initialization can be completed in a few minutes. However, in the following cases,
the settings have not been recorded and the system will not operate properly. If
repeated attempts to record tire inflation pressure settings are unsuccessful, have
the vehicle inspected by your Lexus dealer.
●When operating the satellite switch, the tire pressure warning light does not
blink 3 times.
●After carrying out the initialization procedure, the tire pressure warning light
blinks for 1 minute then stays on after driving for about 20 minutes.
■Routine tire inflation pressure checks
The tire pressure warning system does not replace routine tire inflation pressure
checks. Make sure to check tire inflation pressure as part of your routine of daily
vehicle checks.
■Tire pressure warning system certification
FCC ID: PAXPMV107J
FCC ID: HYQ13BCEFor vehicles sold in the U.S.A.
This device complies with part 15 of the FCC Rules. Operation is subject to the fol-
lowing two conditions: (1) This device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
FCC WARNING:
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment. For vehicles sold in Canada
Operation is subject to the following two conditions: (1) this device may not cause
interference, and (2) this device must accept any interference, including interfer-
ence that may cause undesired operation of the device.
L’utilisation de ce dispositif est autorisée seulement aux deux conditions suivantes:
(1) il ne doit pas produire de brouillage, et (2) l’utilisateur du dispositif doit être prêt
à accepter tout brouillage radioélectrique reçu, même si ce brouillage est
susceptible de compromettre le fonctionnement du dispositif.

498
5-2. Steps to take in an emergency
IS250C/350C_U
CAUTION
■Maintenance of the tires
Each tire, including the spare (if provided), should be checked monthly when cold
and inflated to the inflation pressure recommended by the vehicle manufacturer on
the vehicle placard or tire inflation pressure label (tire and load information label).
(If your vehicle has tires of a different size than the size indicated on the vehicle
placard or tire inflation pressure label [tire and load information label], you should
determine the proper tire inflation pressure for those tires.)
As an added safety feature, your vehicle has been equipped with a tire pressure
monitoring system (TPMS-tire pressure warning system) that illuminates a low tire
pressure telltale (tire pressure warning light) when one or more of your tires is sig-
nificantly under-inflated. Accordingly, when the low tire pressure telltale (tire pres-
sure warning light) illuminates, you should stop and check your tires as soon as
possible, and inflate them to the proper pressure. Driving on a significantly under-
inflated tire causes the tire to overheat and can lead to tire failure. Under-inflation
also reduces fuel efficiency and tire tread life, and may affect the vehicle's handling
and stopping ability.
Please note that the TPMS (tire pressure warning system) is not a substitute for
proper tire maintenance, and it is the driver's responsibility to maintain correct tire
pressure, even if under-inflation has not reached the level to trigger illumination of
the TPMS low tire pressure telltale (tire pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warning system)
malfunction indicator to indicate when the system is not operating properly. The
TPMS (tire pressure warning system) malfunction indicator is combined with the
low tire pressure telltale (tire pressure warning light). When the system detects a
malfunction, the telltale will flash for approximately one minute and then remain
continuously illuminated. This sequence will continue upon subsequent vehicle
start-ups as long as the malfunction exists. When the malfunction indicator is illumi-
nated, the system may not be able to detect or signal low tire pressure as intended.
TPMS (tire pressure warning system) malfunctions may occur for a variety of rea-
sons, including the installation of replacement or alternate tires or wheels on the
vehicle that prevent the TPMS (tire pressure warning system) from functioning
properly. Always check the TPMS (tire pressure warning system) malfunction tell-
tale after replacing one or more tires or wheels on your vehicle to ensure that the
replacement or alternate tires and wheels allow the TPMS (tire pressure warning
system) to continue to function properly.

5
When trouble arises
507
5-2. Steps to take in an emergency
IS250C/350C_U
(U.S.A. only)
Indicates that all mainte-
nance according to the
driven distance on the
maintenance schedule*
should be performed
soon.
If necessary, perform
maintenance.
Comes on approximately
4500 miles (7200 km)
after the maintenance
data has been reset.
(U.S.A. only)
Indicates that all mainte-
nance is required to cor-
respond to the driven
distance on the mainte-
nance schedule*.
Perform the necessary
maintenance. Please reset
the maintenance data
after the maintenance is
performed (→P. 4 0 5 )
Comes on approximately
5000 miles (8000 km)
after the maintenance
data has been reset.
(The indicator will not
work properly unless the
maintenance data has
been reset.)
(Flashing)
(If equipped)
Indicates that the pre-
collision system is not
currently functional.• Clean the grille and the sensor.
• Wait until the pre-colli-
sion system cools down.
MessageDetailsCorrection procedure

579
6-1. Specifications
6
Vehicle specifications
IS250C/350C_U■
Temperature A, B, C
The temperature grades are A (the highest), B, and C, representing
the tire's resistance to the generation of heat and its ability to dissipate
heat when tested under controlled conditions on a specified indoor
laboratory test wheel.
Sustained high temperature can cause the material of the tire to degenerate
and reduce tire life, and excessive temperature can lead to sudden tire fail-
ure.
The grade C corresponds to a level of performance which all passenger car
tires must meet under the Federal Motor Vehicle Safety Standard No. 139.
Grades B and A represent higher levels of performance on the laboratory
test wheel than the minimum required by law.
Warning: The temperature grades for this tire are established for a tire that
is properly inflated and not overloaded.
Excessive speed, underinflation, or excessive loading, either separately or in
combination, can cause heat buildup and possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of automatic transmis-
sion, power steering, power brakes, power windows,
power seats, radio and heater, to the extent that these
items are available as factory-installed equipment
(whether installed or not)
Cold tire inflation pres-
sureTire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil and
coolant, and if so equipped, air conditioning and
additional weight optional engine

582
6-1. Specifications
IS250C/350C_U
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 separationA 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
CarcassThe tire structure, except tread and sidewall rubber
which, when inflated, bears the load
ChunkingThe breaking away of pieces of the tread or sidewall
CordThe strands forming the plies in the tire
Cord separationThe parting of cords from adjacent rubber com-
pounds
CrackingAny 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
GrooveThe space between two adjacent tread ribs
InnerlinerThe layer(s) forming the inside surface of a tubeless
tire that contains the inflating medium within the tire
Innerliner separationThe parting of the innerliner from cord material in the
carcass
Tire related termMeaning

584
6-1. Specifications
IS250C/350C_U
Ply separationA parting of rubber compound between adjacent
plies
Pneumatic tire
A mechanical device made of rubber, chemicals, fab-
ric and steel or other materials, 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
SidewallThat portion of a tire between the tread and bead
Sidewall separationThe 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 mThe rim on which a tire is fitted for testing, and may be
any rim listed as appropriate for use with that tire
Tire related termMeaning

599
7
IS250C/350C_U
For owners
ATTENTION
■Précautions concernant les coussins gonflables SRS
Respectez les précautions suivantes concernant les coussins gonflables.
Autrement, des blessures graves, voire mortelles, pourraient s’ensuivre.
●Le conducteur et les passagers du véhicule doivent porter correctement leur
ceinture de sécurité.
Les coussins gonflables SRS sont des dispositifs supplémentaires à utiliser avec
les ceintures de sécurité.
●Le coussin gonflable SRS conducteur se déploie avec une violence considérable,
qui peut être très dangereuse, voire mortelle, si le conducteur se trouve très près
du coussin gonflable. L’agence fédérale chargée de la sécurité routière aux
États-Unis (“NHTSA”) conseille:
La zone à risque du coussin gonflable conducteur se situant dans les premiers 2 à
3 in. (50 à 75 mm) de déploiement, vous disposez d'une marge de sécurité
confortable en vous plaçant à 10 in. (250 mm) de votre coussin gonflable
conducteur. Cette distance est à mesurer entre l’axe du volant et le sternum. Si
vous êtes assis à moins de 10 in. (250 mm), vous pouvez changer votre position
de conduite de plusieurs façons:
 Reculez votre siège le plus possible, de manière à pouvoir encore atteindreconfortablement les pédales.
 Inclinez légèrement le dossier du siège. Bien que les véhicules puissent être différents les uns des autres, la plupart
des conducteurs peuvent s’asseoir à une distance de 10 in. (250 mm), même
avec le siège conducteur complètement avancé, simplement en inclinant un
peu le dossier de siège. Si vous avez des difficultés à voir la route après avoir
incliné votre siège, utilisez un coussin ferme et antidérapant pour vous
rehausser ou, si votre véhicule est équipé du réglage en hauteur du siège,
remontez-le.
 Si votre volant est réglable, inclinez-le vers le bas. Cela a pour effet d’orienter le coussin gonflable en direction de votre poitrine plutôt que de votre tête et
de votre cou.
Réglez votre siège selon ces recommandations de la NHTSA, tout en conservant le
contrôle des pédales, du volant et la vue des commandes du tableau de bord.

602
IS250C/350C_U
ATTENTION
■Précautions concernant les coussins gonflables SRS
●Si le cache en vinyle recouvre la partie où le coussin gonflable SRS de genoux se
déploie, veillez à l'enlever.
●N’utilisez aucun accessoire de siège venant recouvrir les zones de déploiement
des coussins gonflables latéraux SRS, car il risquerait d’en gêner le déploiement.
●Ne faites pas subir de chocs ou de pressions excessives aux parties renfermant
les composants des coussins gonflables SRS, illustrées P. 597.
En effet, cela pourrait entraîner un fonctionnement anormal des coussins
gonflables SRS.
●Ne touchez aucun composant du système immédiatement après le déploiement
(gonflage) des coussins gonflables SRS, car ils peuvent être chauds.
●Si vous avez des difficultés à respirer après le déploiement du coussin gonflable
SRS, ouvrez une porte ou une vitre pour faire entrer de l’air frais, ou bien
descendez du véhicule si cela ne présente pas de danger. Essuyez tout résidu
dès que possible afin d’éviter d’éventuelles irritations de la peau.
●Si les parties renfermant les coussins gonflables SRS, telles que la garniture du
moyeu de volant, apparaissent abîmées ou craquelées, faites-les remplacer par
votre concessionnaire Lexus.
●Ne fixez ni ne posez aucun objet sur le
tableau de bord, la garniture du volant de
direction et la partie inférieure du tableau
de bord.
Au déploiement des coussins gonflables
conducteur, passager avant et genoux
SRS, tout objet risque de se transformer en
projectile.
●Ne fixez rien aux parties telles que les
portes.