2012 Lexus IS250 ignition

346
3-7. Other interior features
IS350/250_U
■The seat heaters can be used when
The “ENGINE START STOP” switch is in IGNITION ON mode.
■When not in use
Set the dial to “0”. The indicator light turns off.
Vehicles with a manual transmissionHeats the seats
The indicator light comes on.
The higher the number, the
warmer the seats become.Front
passenger’s
seat
Driver’s
seat

349
3-7. Other interior features
3
Interior features
IS350/250_U
■The seat heaters and ventilators can be used when
The “ENGINE START STOP” switch is in IGNITION ON mode.
■When not in use
Set the dial to “0”. The indicator light turns off.
Vehicles with a manual transmissionHeats the seats
The indicator light (amber)
comes on.
The higher the number, the
warmer the seats become.
Blows air from the seats
The indicator light (green)
comes on.
The higher the number, the
stronger the airflow becomes.
Driver’s
seat
Front
passenger’s
seat

352
3-7. Other interior features
IS350/250_U
Rear sunshade∗
■Reverse operation feature
This function will become operational after the vehicle has been driven at 9 mph (15
km/h) or more with the rear sunshade in the raised position.
To ensure adequate rear visibility, the sunshade automatically lowers when the shift
lever is shifted to R and the function is in an operational condition.
However, the rear sunshade is raised again if either of the following occurs:
●The switch is pressed again.
●The shift lever is shifted out of R, and the vehicle reaches a speed of 9 mph (15
km/h).
If the engine is turned off when the rear sunshade has been lowered due to the
reverse operation feature, it will not be raised even when the engine is turned on
again and the vehicle reaches a speed of 9 mph (15 km/h). To raise the sunshade
again, press the switch.
■The rear sunshade can be used when
The “ENGINE START STOP” switch is in IGNITION ON mode.
The rear sunshade can be raised and lowered by operating the switch
shown below.
Raise/lower
∗: If equipped

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3-7. Other interior features
3
Interior features
IS350/250_U
Safety Connect LED light IndicatorsWhen the “ENGINE START STOP” switch is turned to IGNITION ON
mode, the red indicator light comes on for 2 seconds then turns off.
Afterward, the green indicator light comes on, indicating that the service
is active.
The following indicator light patterns indicate specific system usage con-
ditions:
● Green indicator light on = Active service
● Green indicator light flashing = Safety Connect call in process
● Red indicator light (except at vehicle start-up) = System malfunction
(contact your Lexus dealer)
● No indicator light (off) = Safety Connect service not active
Safety Connect services
■ Automatic Collis ion Notification
In case of either airbag deployment or severe rear-end collision, the
system is designed to automatically call the response center. The
responding agent receives the vehicle’s location and attempts to speak
with the vehicle occupants to assess the level of emergency. If the
occupants are unable to communicate, the agent automatically treats
the call as an emergency, contacts the nearest emergency services
provider to describe the situation, an d requests that assistance be sent
to the location.

386
4-2. Maintenance
IS350/250_U
■Reset the maintenance data (U.S.A. only)
After the required maintenance is performed according to the maintenance sched-
ule, please reset the maintenance data.
To reset the data, follow the procedures described below:Switch the display to the odometer ( →P. 158) when the engine is running.
Turn the “ENGINE START STOP” switch OFF.
While pressing the trip meter reset button, set the “ENGINE START
STOP” switch to IGNITION ON mode (but do not start the engine
because otherwise the reset mode will be cancelled). Continue to press
and hold the button until the trip meter displays “000000”.
■Allow inspection and repairs to be performed by a Lexus dealer
●Lexus technicians are well-trained specialists and are kept up to date with the
latest service information. They are well informed about the operations of all
systems on your vehicle.
●Keep a copy of the repair order. It proves that the maintenance that has been
performed is under warranty coverage. If any problem should arise while your
vehicle is under warranty, your Lexus dealer will promptly take care of it.
CAUTION
■If your vehicle is not properly maintained
It could result in serious damage to the vehicle and possible serious injury or death.
■Warning in handling of battery
●Engine exhaust, some of its constituents, and a wide variety of automobile com-
ponents contain or emit chemicals known to the State of California to cause can-
cer and birth defects and other reproductive harm. Work in a well ventilated area.
●Oils, fuels and fluids contained in vehicles as well as waste produced by compo-
nent wear contain or emit chemicals known to the State of California to cause
cancer and birth defects or other reproductive harm. Avoid exposure and wash
any affected area immediately.
●Battery posts, terminals and related accessories contain lead and lead com-
pounds which are known to cause brain damage. Wash your hands after han-
dling. (→P. 4 0 8 )
STEP1
STEP2
STEP3

393
4-3. Do-it-yourself maintenance
4
Maintenance and care
IS350/250_U
CAUTION
The engine compartment contains many mechanisms and fluids that may move sud-
denly, become hot, or become electrically energized. To avoid death or serious injury,
observe the following precautions.
■When working on the engine compartment
●Keep hands, clothing, and tools away from the moving fan and engine drive belt.
●Be careful not to touch the engine, radiator, exhaust manifold, etc. right after driv-
ing as they may be hot. Oil and other fluids may also be hot.
●Do not leave anything that may burn easily, such as paper or rags, in the engine
compartment.
●Do not smoke, cause sparks or expose an open flame to fuel or the battery. Fuel
and battery fumes are flammable.
●Be extremely cautious when working on the battery. It contains poisonous and
corrosive sulfuric acid.
■When working near the electric cooling fan or radiator grille
Be sure the “ENGINE START STOP” switch is OFF.
With the “ENGINE START STOP” switch in IGNITION ON mode, the electric
cooling fan may automatically start to run if the air conditioning is on and/or the
coolant temperature is high. (→P. 406)
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from getting
in the eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear due to
dirt in the air. Also, a backfire could cause a fire in the engine compartment.

415
4-3. Do-it-yourself maintenance
4
Maintenance and care
IS350/250_U■
How to initialize the tire pressure warning system
To initialize the system, use the satellite switch. ( →P. 3 3 9 )
Park the vehicle in safe place and turn the “ENGINE START
STOP” switch OFF.
While the vehicle is moving, initialization is not performed.
Adjust the tire inflation pressure to the specified cold tire inflation
pressure level. (→ P. 5 3 1 )
Make sure to adjust the tire pressure to the specified cold tire inflation
pressure level. The tire pressure warning system will operate based on
this pressure level.
Turn the “ENGINE START STOP” switch to IGNITION ON
mode.
The tire inflation pressure initial-
ization setting display
Continue to press “<” or “>” until
the initialization setting display
appears.
Recording tire inflation pressure
settings
Push and hold the “ON/OFF” but-
ton until the tire pressure warning
light blinks slowly three times.
Wait for a few minutes with the IGNITION ON mode, and then
turn the “ENGINE START STOP” switch OFF.
STEP1
STEP2
STEP3
STEP4
STEP5

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4-3. Do-it-yourself maintenance
4
Maintenance and care
IS350/250_U
13FR CTRL-AM30 AFR TAIL, FR FOG, WASHER
14IG210 AIgnition system
15EFI NO.210 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
16H-LP R LWR15 AHeadlight low beam (right)
17H-LP L LWR15 AHeadlight low beam (left)
18F/ P M P25 AFuel system
19EFI25 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, EFI NO.2
20INJ20 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
21H-LP UPR15 AHeadlight high beams
22HORN10 AHorns
23WA S H E R20 AWindshield washer
24FR TAIL10 AParking lights
25FR FOG15 AFront fog lights
FuseAmpereCircuit