spare tire Lexus IS250C 2012 Instrument cluster / LEXUS 2012 IS250C,IS350C (OM53A62U) User Guide

5
When trouble arises
525
5-2. Steps to take in an emergency
CAUTION
■When using the compact spare tire
●Remember that your compact spare tire is specifically designed for use with your
vehicle. Do not use your compact spare tire on another vehicle.
●Do not use two compact spare tires simultaneously.
●Replace the compact spare tire with a standard tire as soon as possible.
●Avoid sudden acceleration, deceleration and braking, as well as sharp cornering.
■Speed limit when using the compact spare tire
Do not drive at speeds in excess of 50 mph (80 km/h) when a compact spare tire is
installed on the vehicle.
The compact spare tire is not designed for driving at high speeds. Failing to observe
this precaution may lead to an accident causing death or serious injury.
■When the spare tire is attached
The vehicle speed may not be correctly detected, and the following systems may
not operate correctly:
●ABS & brake assist
●VSC
●TRAC
●VDIM
●EPS
●Navigation system (if equipped)
●Intuitive parking assist (if equipped)
●Dynamic radar cruise control (if equipped)
●Cruise control (if equipped)
●PCS (if equipped)

526
5-2. Steps to take in an emergency
NOTICE
■Do not drive the vehicle with a flat tire.
Do not continue driving with a flat tire.
Driving even a short distance with a flat tire can damage the tire and the wheel
beyond repair.
■Be careful when driving over bumps with the compact spare tire installed on the
vehicle.
The vehicle becomes lower when driving with the compact spare tire compared to
when driving with standard tires. Be careful when driving over uneven road sur-
faces.
■Driving with tire chains and the compact spare tire
Do not fit tire chains to the compact spare tire.
Tire chains may damage the vehicle body and adversely affect driving performance.
■When replacing the tires
When removing or fitting the wheels, tire s or the tire pressure warning valve and
transmitter, contact your Lexus dealer as the tire pressure warning valve and trans-
mitter may be damaged if not handled correctly.
■To avoid damage to the tire pressure warning valves and transmitters
When a tire is repaired with liquid seal ants, the tire pressure warning valve and
transmitter may not operate properly. If a liquid sealant is used, contact your Lexus
dealer or other qualified service shop as so on as possible. Make sure to replace the
tire pressure warning valve and transmitter when replacing the tire. ( P. 4 3 8 )

5
When trouble arises
527
5-2. Steps to take in an emergency
If you have a flat tire (vehicles with run-flat tires)
■In some condition (such as at high temperatures)
You cannot continue driving for up to 100 miles (160 km).
■If you cannot distinguish between th e standard tires and run-flat tires
Consult your Lexus dealer.
■Spare tire
A spare tire is not provided on the vehicle with run-flat tires.
■For the detailed information on run-flat tires
See the tire warranty book.
Take your vehicle to the nearest Lexus dealer or authorized tire dealer as
soon as possible.
■ Run-flat tires (A “RFT” or “DSST” mark is molded on the sidewall)
You can continue driving a vehi-
cle with run-flat tires even if any
tire goes flat.
It is able to run for a maximum of
100 miles (160 km) at a speed
below 50 mph (80 km/h) after
the tire pressure warning light
comes on. (P. 4 9 7 )

572
6-1. Specifications
Steering
Tires and wheelsTy p e A
Free playLess than 1.2 in. (30 mm)
Ti r e s i z e
Front tires: 225/45R17 90W
Rear tires: 245/45R17 95W
Spare tire: T125/70D17 98M
Front and rear tire inflation pres-
sure
(Recommended cold tire inflation
pressure)
Driving under normal conditions
Front:
35 psi (240 kPa, 2.4 kgf/cm
2 or bar)*
Rear:
38 psi (260 kPa, 2.6 kgf/cm
2 or bar)*
Spare:
60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
*: When driving at high speeds above 100 mph (160 km/h), in countries where such speeds
are permitted by law, add 4.5 psi (30 kPa, 0.3
kgf/cm
2 or bar) to the front tires and rear
tires. Never exceed the maximum cold tire
inflation pressure indicated on the tire side-
wall.
Wheel size17  8J, 17  4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

573
6-1. Specifications
6
Vehicle specifications
Type B
Ti r e s i z e
Front tires: 225/45R17 91V
Rear tires: 245/45R17 95V
Spare tire: T125/70D17 98M
Front and rear tire inflation pres-
sure
(Recommended cold tire inflation
pressure)
Driving under normal conditionsFront:
35 psi (240 kPa, 2.4 kgf/cm
2 or bar)*
Rear:
38 psi (260 kPa, 2.6 kgf/cm
2 or bar)*
Spare:
60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
*: When driving at high speeds above 100 mph (160 km/h), in countries where such speeds
are permitted by law, add 7.2 psi (50 kPa, 0.5
kgf/cm
2 or bar) to the front tires and rear
tires. Never exceed the maximum cold tire
inflation pressure indicated on the tire side-
wall.
Wheel size17  8J, 17  4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

574
6-1. Specifications
Ty p e C
Ti r e s i z e
Front tires: 225/40R18 88Y
Rear tires: 255/40R18 95Y
Spare tire: T145/70D17 106M
Front and rear tire inflation pres-
sure
(Recommended cold tire inflation
pressure)
Driving under normal conditions Front:
35 psi (240 kPa, 2.4 kgf/cm
2 or bar)*
Rear:
38 psi (260 kPa, 2.6 kgf/cm
2 or bar)*
Spare:
60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
*: When driving at high speeds above 100 mph (160 km/h), in countries where such speeds
are permitted by law, add 7.2 psi (50 kPa, 0.5
kgf/cm
2 or bar) to the front tires and rear
tires. Never exceed the maximum cold tire
inflation pressure indicated on the tire side-
wall.
Wheel size
Front wheels: 18  8J
Rear wheels: 18 8 1 /2J
Spare wheel: 17  4T
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

575
6-1. Specifications
6
Vehicle specifications
Type D
Ti r e s i z e
Front tires: 225/40R18 88W
Rear tires: 255/40R18 95W
Spare tire: T145/70D17 106M
Front and rear tire inflation pres-
sure
(Recommended cold tire inflation
pressure)
Driving under normal conditionsFront:
35 psi (240 kPa, 2.4 kgf/cm
2 or bar)*
Rear:
38 psi (260 kPa, 2.6 kgf/cm
2 or bar)*
Spare:
60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
*: When driving at high speeds above 100 mph (160 km/h), in countries where such speeds
are permitted by law, add 7.2 psi (50 kPa, 0.5
kgf/cm
2 or bar) to the front tires and rear
tires. Never exceed the maximum cold tire
inflation pressure indicated on the tire side-
wall.
Wheel size
Front wheels: 18  8J
Rear wheels: 18 8 1 /2J
Spare wheel: 17  4T
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

582
6-1. Specifications
Tire information
Ty p i c a l t i r e s y m b o l s
Standard tire
Compact spare tire
Tire size (P. 585)
DOT and Tire Identification Number (TIN) ( P. 584)
Location of treadwear indicators ( P. 4 3 7 )
Tire ply composition and materials
Plies are layers of rubber-coated parallel cords. Cords are the strands
which form the plies in a tire.

583
6-1. Specifications
6
Vehicle specifications
Radial tires or bias-ply tires
A radial tire has “RADIAL” on the sidewall. A tire not marked “RADIAL” is
a bias-ply tire.
TUBELESS or TUBE TYPE
A tubeless tire does not have a tube and air is directly filled in the tire. A
tube type tire has a tube inside the ti re and the tube maintains the air pres-
sure.
Load limit at maximum cold tire inflation pressure ( P. 443)
Maximum cold tire inflation pressure ( P. 5 7 2 )
This means the pressure to which a tire may be inflated.
Uniform tire quality grading
For details, see “Uniform Tire Quality Grading” that follows.
Summer tire or all season tire (P. 443)
An all season tire has “M+S” on the sidewall. A tire not marked “M+S” is a
summer tire.
“TEMPORARY USE ONLY” ( P. 523)
A compact spare tire is identified by the phrase “TEMPORARY USE
ONLY” molded into its sidewall. This tire is designed for temporary
emergency use only.
Run-flat tire (RFT) or standard tire ( P. 585)
This vehicle can be equipped with ei ther run-flat tires (RFT) or standard
tires. A “RFT” or “DSST” mark is molded on the sidewall of the run-flat
tire.

627
Alphabetical index
Side mirrorAdjusting and folding ..........................79
Mirror position memory ..................... 61
Smart access system with push-button startEntry function ..........................................32
Starting the engine..............................148
“SOS” button ......................................... 394
Spare tire Inflation pressure ................................447
Storage location.................................. 518
Spark plug ............................................... 568
Specifications......................................... 560
Speedometer Speed indicator ....................................166
Speedometer ........................................166
Steering wheel Adjustment ...............................................76
Audio switches ................................... 306
Steering wheel positionmemory ................................................... 61
Storage feature ....................................... 361 Stuck
If your vehicle becomes stuck .... 545
Sun visors .................................................368
Switch All window control switch ................ 82
ECT switch............................................. 154
Emergency flasher switch ............ 486
Engine switch ........................................ 148
ETCS switch ............................................ 161
Fog light switch .................................... 185
Hazard light switch .......................... 486
Ignition switch ....................................... 148
Light switches ......................................... 181
Power door lock switch .................... 47
Power window switch ........................ 82
Roof switch...............................................86
Satellite switches...................................371
Transmission shift switches ......................................155, 157
Window lock switch............................83
Wiper and washer switch............... 187