2008 TOYOTA YARIS SEDAN sensor

46 1-3. Adjustable components (seats, mirrors, steering wheel)
CAUTION
nWearing a seat belt
lDo not recline the seat any more than necessary to achieve a proper seat-
ing position. The seat belt is most effective when the occupants are sitting
up straight and well back in the seats.
l Do not wear the shoulder belt under your arm.
l Always wear your seat belt low and snug across your hips.
n Seat belt pretensioners
lDo not place anything, such as a cushion, on the front passenger’s seat.
Doing so will disperse the passenger’s weight, which prevents the sensor
from detecting the passenger’s weight properly. As a result, the seat belt
pretensioner for the front passenger’s seat may not activate in the event of
a collision.
l If the pretensioner has activated, the seat belt becomes locked: it cannot
be further extended, nor will it return to the stowed position. The seatbelt
cannot be used again and must be replaced at your Toyota dealer.
n Seat belt damage and wear
lDo not damage the seat belts by allowing the belt, plate, or buckle to be
jammed in the door.
l Inspect the seat belt system periodically. Check for cuts, fraying, and loose
parts. Do not use a damaged seat belt until it is replaced. Damaged seat
belt cannot protect an occupant from death or serious injury.
l Ensure that the belt and tab are locked and the belt is not twisted.
If the seat belt does not function correctly, immediately contact your Toyota
dealer.
l Replace the seat assembly, including the belts, if your vehicle has been
involved in a serious accident, even if there is no obvious damage.
l Do not attempt to install, remove, modify, disassemble or dispose of the
seat belts. Have any necessary repairs carried out by your Toyota dealer.
Inappropriate handling of the pretensioner may prevent it from operating
properly resulting in death or serious injury.

67
1-7. Safety information
1
Before driving
Airbag system components
Front passenger airbag
Curtain shield airbags (if
equipped)
Side airbags (if equipped)
SRS warning light
Curtain shield airbag sen-
sors (if equipped)
Driver airbag
Side and curtain shield air-
bag sensors (if equipped) Driver’s seat position sen-
sor
Driver’s seat belt buckle
switch
AIR BAG ON and AIR BAG
OFF indicator lights
Front airbag sensors
Airbag sensor assembly
Front passenger’s seat belt
buckle switch
Occupant detection system
(ECU and sensors)

68 1-7. Safety information
Your vehicle is equipped with ADVANCED AIRBAGS designed based
on US motor vehicle safety standards (FMVSS208). The airbag sys-
tem controls airbag deployment po wer for the driver and front pas-
senger. The driver airbag system consists of the driver seat’s position
sensor etc. The front passenger’s airbag system consists of the front
passenger occupant classification sensor etc.
The main SRS airbag system components are shown above. The
SRS airbag system is controlled by the airbag sensor assembly. The
airbag sensor assembly consists of a safing sensor and an airbag
sensor.
In certain types of severe frontal or side impacts, the SRS airbag sys-
tem triggers the airbag inflators. A chemical reaction in the inflators
quickly fills the airbags with non-toxic gas to help restrain the motion
of the occupants.
n SRS warning light
This warning light system monitors the airbag sensor assembly, front airbag
sensors, side and curtain shield airbag sensors, curtain shield airbag sen-
sors, driver’s seat position sensor, driver’s seat belt buckle switch, front pas-
senger occupant classification system, AIR BAG ON indicator light, AIR
BAG OFF indicator light, front passenger’s seat belt buckle switch, seat belt
pretensioner assemblies, inflators, interconnecting wiring and power
sources. ( →P. 293)
n If the SRS airbags deploy (inflate)
lBruising and slight abrasions may result from contact with a deploying
(inflating) SRS airbag.
l A loud noise and white powder will be emitted.
l Vehicles with side and curtain shield airbags: Parts of the airbag module
(steering wheel hub, airbag cover and inflator) as well as the front seats,
and parts of the front and rear pillars and roof side rail, may be hot for
several minutes. The airbag itself may also be hot.
l Vehicles without side and curtain shield airbags: Parts of the airbag mod-
ule (steering wheel hub, airbag cover and inflator) as well as the front
seats may be hot for several minutes. The airbag itself may also be hot.

250
4-3. Do-it-yourself maintenance
Wheels
nWhen replacing wheels
The wheels of your Toyota are equipped with sensors that allow the tire
pressure warning system sensors to provide advanced warning in the
event of a loss in tire inflation pressure. Whenever wheels are replaced,
the tire pressure warning valve and transmitter must be switched over
from the old wheels. (→P. 241)
If a wheel is bent, cracked or heavily corroded, it should be
replaced.
Otherwise, the tire may separate from the wheel or cause loss of
handling control.
n Wheel selection
When replacing wheels, care should be taken to ensure that
they are equivalent to those removed in load capacity, diameter,
rim width, and offset.
Replacement wheels are available at your Toyota dealer.
Toyota does not recommend using:
lWheels of different sizes or types
l Used wheels
l Bent wheels that have been straightened
n Aluminum wheel precautions (if equipped)
lUse only Toyota wheel nuts and wrench designed for use with
your aluminum wheels.
l When rotating, repairing or changing your tires, check that the
wheel nuts are still tight after driving 1000 miles (1600 km).
l Be careful not to damage the aluminum wheels when using
tire chains.
l Use only Toyota genuine balance weights or equivalent and a
plastic or rubber hammer when balancing your wheels.

290
5-1. Essential information
Event data recorder
In a crash or a near car crash eventThe SRS airbag sensor assembly contains the EDR. In a crash or a
near car crash event, this device may record some or all of the follow-
ing information:
l Engine speed
l Whether the brake pedal was applied or not
l Vehicle speed
l To what extent the accelerator pedal was depressed
l Position of the transmission shift lever
l Whether the driver and front passenger wore seat belts or not
l Driver’s seat position
l Front passenger’s occupant classification
l SRS airbag deployment data
l SRS airbag system diagnostic data
Your vehicle has computers that monitor and control certain aspects
of your vehicle. These computers assi st in driving and maintaining
optimal vehicle performance.
Besides storing data useful for tr oubleshooting, there is an event
data recorder (EDR) that records data in a crash or a near car
crash event.

298 5-2. Steps to take in an emergency
nKey reminder buzzer
The buzzer indicates that the key has not been removed (with the engine
switch in the ACC or LOCK position and the driver’s door opened).
n Light reminder buzzer
The buzzer indicates that the headlight switch is left on (with the key
removed and the driver’s door opened).
n If the malfunction indicator lamp comes on while driving
First check the following:
l Is your vehicle low on gas?
If it is, refuel the vehicle immediately.
l Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after taking several driving trips.
If the light does not go off even after several trips, contact your Toyota dealer
as soon as possible.
n Front passenger detect ion sensor and passenger seat belt reminder
If luggage or other load is placed on the front passenger seat, depending on
its weight, the reminder light to flash and buzzer to sound.
n
When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level.
nThe tire pressure warning light ma y turn on due to natural causes
The tire pressure warning light may turn on due to natural causes such
as natural air leaks or tire inflation pressure changes caused by temper-
ature. In this case, adjusting the ti re inflation pressure will turn off the
warning light after a few minutes.
nWhen a tire is replaced with a compact spare tire
The compact spare tire is not equipped with the tire pressure warning
valve and transmitter. If a tire goes flat, the warning light will not turn off
even though the flat tire is replac ed with the compact spare tire. Replace
the compact spare tire with the repaired tire and adjust the proper tire
inflation pressure. The ti re pressure warning light will turn off after a few
minutes.

367
Alphabetical index
Theft prevention labels ........... 63
Theft prevention labels ............. 63
Tire inflation pressure ............ 246
Tire information Glossary ............................... 345
Size ...................................... 342
Tire identification number ..... 341
Uniform tire quality grading .. 343
Tires Chains .................................. 141
Checking .............................. 240
If you have a flat tire ............. 302
Identification number ............ 338
Inflation pressure .......... 246, 333
Inflation pressure sensor ...... 241
Information ........................... 338
Replacing ..................... 240, 302
Rotating tires ........................ 240
Size ...................................... 333
Snow tires............................. 141
Spare tire .............................. 302
Tire pressure warningsystem........................ 240, 295
Warning light ........................ 295
Tools......................................... 302
Total load capacity .................. 140
Towing Dinghy towing ............... 153, 154
Emergency towing ................ 282
Trailer towing ................ 144, 145
Trip meter................................. 121
Trunk .......................................... 32
Trunk light Wattage ................................ 334
Turn signal lights
Indicator................................ 115
Lever .................................... 115
Replacing light bulbs ............ 269
Switch ................................... 115
Wattage ................................ 334 Vanity mirrors...........................200
Vehicle identification
number ...................................327
Warning buzzers Brake system ........................292
Seat belt reminder .................295
Warning lights ABS .......................................293
Airbag system .......................293
Anti-lock brake system ..........293
Brake system ........................292
Charging system .... ...............293
Driver’s seat belt ...................295
Electric power steering system ................................293
Electronic engine control system ................................293
Engine oil replacement..........295
EPS system...........................293
Front passenger occupant classification system ...........293
Front passenger’s seat belt ...295
High engine coolant temperature ........................293
Low brake fluid ......................292
Low engine oil pressure ........293
Low fuel level ........................295
Low tire inflation pressure .....295
Low washer fluid ...................295
Malfunction ............................293
Open door .............................295
Seat belt ................................295
Seat belt pretensioner system ................................293
SRS .......................................293
SRS airbag system ...............293
Tire pressure .........................295
Tire pressure warning system ................................295V
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