ecu Lexus GX460 2015 User Guide

351-1. For safe use
GX 460 _O M_ OM6 0L 72U _( U)
1
For safety and security
◆SRS side and curtain shield airbags SRS front side airbags
Can help protect the torso of the front seat occupants
SRS rear side airbags
Can help protect the torso of occupants in the outer second seats
SRS curtain shield airbags
●Can help protect primarily the head of occupants in the outer seats
●Can prevent the occupants from being thrown from the vehicle in the
event of vehicle rollover
3
4
5
GX460_OM_OM60L72U_(U).book Page 35 Friday, May 16, 2014 3:03 PM

361-1. For safe use
GX 460 _O M_ OM6 0L 72U _( U)
Airbag system components
Knee airbags
Curtain shield airbags
Front passenger airbag
Side impact sensors (front door)
“A I R B A G O N ” a n d
“AIR BAG OFF” indicator lights
Front side airbags
SRS warning light
Side impact sensors (rear)
Rear side airbags (outer second
seat)Driver airbag
Driver’s seat belt buckle switch
Safing sensor (rear)
Front passenger’s seat belt buckle
switch
Airbag sensor assembly
Front impact sensors
Seat belt pretensioners and force
limiters
Front passenger occupant classifi-
cation system (ECU and sensors)1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
GX460_OM_OM60L72U_(U).book Page 36 Friday, May 16, 2014 3:03 PM

371-1. For safe use
GX 460 _O M_ OM6 0L 72U _( U)
1
For safety and security
Your vehicle is equipped with ADVANCED AIRBAGS designed based on the
US motor vehicle safety standards (FMVSS208). The airbag sensor assembly
(ECU) controls airbag deployment based on information obtained from the sen-
sors etc. shown in the system components diagram above. This information
includes crash severity and occupant information. As the airbags deploy, a
chemical reaction in the inflators quickly fills the airbags with non-toxic gas to
help restrain the motion of the occupants.
CAUTION
■SRS airbag precautions
Observe the following precautions regarding the SRS airbags.
Failure to do so may cause death or serious injury.
●The driver and all passengers in the vehicl e must wear their seat belts properly.
The SRS airbags are supplemental devices to be used with the seat belts.
●The SRS driver airbag deploys with consider able force, and can cause death or seri-
ous injury especially if the driver is very close to the airbag. The National Highway
Traffic Safety Administration (NHTSA) advises:
Since the risk zone for the driver’s airbag is the first 2 - 3 in. (50 - 75 mm) of inflation,
placing yourself 10 in. (250 mm) from your driver airbag provides you with a clear
margin of safety. This distance is measured from the center of the steering wheel to
your breastbone. If you sit less than 10 in. (250 mm) away now, you can change your
driving position in several ways:
• Move your seat to the rear as far as you can while still reaching the pedals com- fortably.
• Slightly recline the back of the seat. Although vehicle designs vary, many drivers
can achieve the 10 in. (250 mm) distance, even with the driver seat all the way for-
ward, simply by reclining the back of th e seat somewhat. If reclining the back of
your seat makes it hard to see the road, raise yourself by using a firm, non-slippery
cushion, or raise the seat if your vehicle has that feature.
• If your steering wheel is adju stable, tilt it downward. This points the airbag toward
your chest instead of your head and neck.
The seat should be adjusted as recommend ed by NHTSA above, while still maintain-
ing control of the foot pedals, steering wh eel, and your view of the instrument panel
controls.
GX460_OM_OM60L72U_(U).book Page 37 Friday, May 16, 2014 3:03 PM

381-1. For safe use
GX 460 _O M_ OM6 0L 72U _( U)
CAUTION
■SRS airbag precautions
●The SRS front passenger airbag also deploys with considerable force, and can cause
death or serious injury especially if the front passenger is very close to the airbag. The
front passenger seat should be as far from the airbag as possible with the seatback
adjusted, so the front passenger sits upright.
●Improperly seated and/or restrained infants and children can be killed or seriously
injured by a deploying airbag. An infant or child who is too small to use a seat belt
should be properly secured using a chil d restraint system. Lexus strongly recom-
mends that all infants and children be placed in the rear seats of the vehicle and prop-
erly restrained. The rear seats are safer for infants and children than the front
passenger seat. ( →P. 5 3 )
●If the seat belt extender has been connected
to the front seat belt buckles but the seat belt
extender has not also been fastened to the
latch plate of the seat belt, the SRS front air-
bags will judge that the driver and front pas-
senger are wearing the seat belt even though
the seat belt has not been connected. In this
case, the SRS front airbags may not activate
correctly in a collision, resulting in death or
serious injury in the event of collision. Be sure
to wear the seat belt with the seat belt
extender.
●Do not sit on the edge of the seat or lean
against the dashboard.
●Do not allow a child to stand in front of the
SRS front passenger airbag unit or sit on the
knees of a front passenger.
●Do not allow the front seat occupants to hold
items on their knees.
GX460_OM_OM60L72U_(U).book Page 38 Friday, May 16, 2014 3:03 PM

391-1. For safe use
GX 460 _O M_ OM6 0L 72U _( U)
1
For safety and security
CAUTION
■SRS airbag precautions
●Do not lean against the door, the roof side rail
or the front, side and rear pillars.
●Do not allow anyone to kneel on the passen-
ger seats toward the door or put their head or
hands outside the vehicle.
●Do not attach anything to or lean anything
against areas such as the dashboard, steering
wheel pad and lower portion of the instru-
ment panel.
These items can become projectiles when the
SRS driver, front passenger and knee airbags
deploy.
GX460_OM_OM60L72U_(U).book Page 39 Friday, May 16, 2014 3:03 PM

411-1. For safe use
GX 460 _O M_ OM6 0L 72U _( U)
1
For safety and security
■If the SRS airbags deploy (inflate)
●Bruising and slight abrasions may result from contact with a deploying (inflating) SRS
airbag.
●A loud noise and white powder will be emitted.
●Parts of the airbag module (steering wheel hub, airbag cover and inflator) as well as the
front seats, parts of the front, side and rear pillars and roof side rails, may be hot for sev-
eral minutes. The airbag itself may also be hot.
●The windshield may crack.
●For Safety Connect subscribers, if the SRS airbags deploy or in the event of a severe
rear-end collision, the system is designed to send an emergency call to the response
center, notifying them of the vehicle’s locat ion (without needing to push the “SOS” but-
ton) and an agent will attempt to speak with the occupants to ascertain the level of
emergency and assistance required. If the occupants are unable to communicate, the
argent automatically treats the call as an emergency and helps to dispatch the neces-
sary emergency services. ( →P. 4 3 2 )
CAUTION
■Modification and disposal of SRS airbag system components
Do not dispose of your vehicle or perform any of the following modifications without
consulting your Lexus dealer. The SRS airbags may malfunction or deploy (inflate)
accidentally, causing death or serious injury.
●Installation, removal, disassembl y and repair of the SRS airbags
●Repairs, modifications, removal or replacement of the steering wheel, instrument
panel, dashboard, seats, seat upholstery, fron t, side and rear pillars or roof side rails
●Repairs or modifications of the front fender, front bumper, or side of the occupant
compartment
●Installation of a grille guard (bull bars, ka ngaroo bar, etc.), snow plows, winches or
roof luggage carrier
●Modifications to the vehicle’s suspension system
●Installation of electronic devices such as mobile two-way radios and CD players
●Modifications to your vehicle for a person with a physical disability
GX460_OM_OM60L72U_(U).book Page 41 Friday, May 16, 2014 3:03 PM

431-1. For safe use
GX 460 _O M_ OM6 0L 72U _( U)
1
For safety and security
■Types of collisions that may not deploy the SRS airbags (SRS front airbags)
The SRS front airbags do not generally inflate if the vehicle is involved in a side or rear
collision, if it rolls over, or if it is involved in a low-speed frontal collision. But, whenever a
collision of any type causes sufficient forward deceleration of the vehicle, deployment of
the SRS front airbags may occur.
●Collision from the side
●Collision from the rear
●Vehicle rollover
GX460_OM_OM60L72U_(U).book Page 43 Friday, May 16, 2014 3:03 PM

451-1. For safe use
GX 460 _O M_ OM6 0L 72U _( U)
1
For safety and security
■When to contact your Lexus dealer
In the following cases, the vehicle will requ ire inspection and/or repair. Contact your
Lexus dealer as soon as possible.
●Any of the SRS airbags have been inflated.
●The front of the vehicle is damaged or
deformed, or was involved in an accident that
was not severe enough to cause the SRS front
airbags to inflate.
●A portion of a door or its surrounding area is
damaged or deformed, or the vehicle was
involved in an accident that was not severe
enough to cause the SRS side and curtain
shield airbags to inflate.
●The pad section of the steering wheel, dash-
board near the front passenger airbag or
lower portion of the instrument panel is
scratched, cracked, or otherwise damaged.
●The surface of the seats with the side airbag is
scratched, cracked or otherwise damaged.
●The portion of the front pillars, center pillars,
rear pillars or roof side rail garnishes (pad-
ding) containing the curtain shield airbags
inside is scratched, cracked or otherwise dam-
aged.
GX460_OM_OM60L72U_(U).book Page 45 Friday, May 16, 2014 3:03 PM

471-1. For safe use
GX 460 _O M_ OM6 0L 72U _( U)
1
For safety and security
■Adult*1
■Child*4 or child restraint system with infant*5
Condition and operation in the fron t passenger occupant classification
system
Indicator/
warning light
“A I R B A G O N ” a n d “A I R B A G O F F ” indicator lights“A I R B A G O N ”
SRS warning lightOff
Seat belt reminder lightOff*2 or flashing*3
Devices
Front passenger airbag
Activated
Side airbag
on the front passenger seat
Curtain shield airbag
in the front passenger side
Front passenger knee airbag
Front passenger’s seat belt pretensioner
Indicator/
warning light
“A I R B A G O N ” a n d “A I R B A G O F F ”
indicator lights“A I R B A G O F F ”*6
SRS warning lightOff
Seat belt reminder lightOff*2 or
flashing*3
Devices
Front passenger airbagDeactivated
Side airbag
on the front passenger seat
ActivatedCurtain shield airbag
in the front passenger side
Front passenger knee airbagDeactivated
Front passenger’s seat belt pretensionerActivated
GX460_OM_OM60L72U_(U).book Page 47 Friday, May 16, 2014 3:03 PM

491-1. For safe use
GX 460 _O M_ OM6 0L 72U _( U)
1
For safety and security
*1: The system judges a person of adult size as an adult. When a smaller adult sits in the front passenger seat, the system may recognize him/her as a child depending
on his/her physique and posture.
*2: In the event the front passenger is wearing a seat belt.
*3: In the event the front passenger does not wear a seat belt
*4: When a larger child who has outgrown a child restraint system sits in the front pas-senger seat, the system may recognize him/her as an adult depending on his/her
physique or posture.
*5: Never install a rear-facing child restraint system on the front passenger seat. A for-
ward-facing child restraint system should only be installed on the front passenger
seat when it is unavoidable. ( →P. 5 3 )
*6: In case the indicator light is not illuminated, consult this manual on how to install the
child restraint system properly. ( →P. 5 7 )
*7: In the event of a side collision.
*8: In the event of a frontal collision or vehicle rollover.
GX460_OM_OM60L72U_(U).book Page 49 Friday, May 16, 2014 3:03 PM