ECU LEXUS LX570 2019 User Guide

371-1. For safe use
LX570_OM_OM60R07U_(U) 1
For safety and security WARNING ■
Using a seat belt extender ●
Do not wear the seat belt extender if you can fasten the seat belt without the extender. ●
Do not use the seat belt extender when in stalling a child restrain t system because the
belt will not securely hold the child restra int system, increasing the risk of death or
serious injury in the event of an accident. ●
The personalized extender may not be safe on another vehicle, when used by another
person, or at a different seating position other than the one originally intended.
NOTICE ■
Using a seat belt extender
When releasing the seat belt, press on the buckle release button on the extender, not
on the seat belt.
This helps prevent damage to the vehicle interior and the extender itself.

391-1. For safe use
LX570_OM_OM60R07U_(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 occupa nts in the second outboard seats
SRS curtain shield airbags ●
Can help protect primarily the head of occupants in the outboard seats●
Can help prevent the occupants from being thrown from the vehicle in
the event of vehicle rollover 3
4
5

40 1-1. For safe use
LX570_OM_OM60R07U_(U) SRS airbag system components
Knee airbags
Curtain shield airbags
Front passenger airbag
Side impact sensors (front door)
Front side airbags
SRS warning light
Side impact sensors (rear)
Rear side airbags (second outboard
seat)
Driver airbag
Driver’s seat belt buckle switch
Safing sensor (rear) Airbag sensor assembly
Front impact sensors
Seat belt pretensioners and force
limiters (front seats)
Driver’s seat position sensor
“AIR BAG ON” and “AIR BAG
OFF” indicator lights
Front passenger’s seat belt buckle
switch
Front passenger occupant classifi-
cation system (ECU and sensors)
Seat belt pretensioners (second
outboard seats)1
2
3
4
5
6
7
8
9
10
11 12
13
14
15
16
17
18
19

411-1. For safe use
LX570_OM_OM60R07U_(U) 1
For safety and security Your vehicle is equipped with ADVA NCED AIRBAGS designed based on the
US motor vehicle safety standards (F MVSS208). The airbag sensor assembly
(ECU) controls airbag deployment based on information obtained from the sen-
sors etc. shown in the system compon ents 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. WARNING ■
SRS airbag precautions
Observe the following precaution s regarding the SRS airbags.
Failure to do so may cause death or serious injury. ●
The driver and all passengers in the vehicle must wear their seat belts properly.
The SRS airbags are supplemental devices to be us ed with the seat belts.●
The SRS driver airbag deploys with considerable 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) dis-
tance, even with the driver seat all the wa y forward, simply by reclining the back of
the seat somewhat. If reclining the back of your seat makes it ha rd to see the road,
raise yourself by using a firm , non-slippery cushion, or ra ise the seat if your vehicle
has that feature.
• If your steering wheel is ad justable, tilt it do wnward. This points the airbag toward
your chest instead of your head and neck.
The seat should be adjusted as recommended by NHTSA ab ove, while still maintain-
ing control of the foot pedals, steering whee l, and your view of the instrument panel
controls.

42 1-1. For safe use
LX570_OM_OM60R07U_(U) WARNING ■
SRS airbag precautions
●
The SRS front passenger airbag also deploy s with considerable force, and can cause
death or serious injury especially if the fron t 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 infant s 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 se ats are safer for infants an d children than the front
passenger seat. (  P. 56)●
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.

431-1. For safe use
LX570_OM_OM60R07U_(U) 1
For safety and security WARNING ■
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 po rtion of the instru-
ment panel.
These items can become projectiles when the
SRS driver, front passeng er and knee airbags
deploy.

451-1. For safe use
LX570_OM_OM60R07U_(U) 1
For safety and security ■
If the SRS airbags deploy (inflate) ●
Slight abrasions, burns, brui sing etc., may be sustained from SRS airbags, due to the
extremely high speed deployment (inflation) by hot gases. ●
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 Lexus Enform 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 location (without needing to push the
“SOS” button) and an agent will attempt to speak with the occupa nts to ascertain the
level of emergency and assistance required . If the occupants are unable to communi-
cate, the agent automatically treats the call as an emergency and helps to dispatch the
necessary emergency services. (  P. 74)WARNING ■
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 airb ags may malfunction or deploy (inflate)
accidentally, causing death or serious injury. ●
Installation, removal, disassembly and repair of the SRS airbags ●
Repairs, modifications, removal or replacement of the steering wheel, instrument
panel, dashboard, seats, seat upholstery, front, side and rear pillars or roof side rails●
Repairs or modifications of the front fend er, 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

471-1. For safe use
LX570_OM_OM60R07U_(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 gene rally 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.
■
Types of collisions that may not deploy the SRS airbags
(SRS side and curtain shield airbags)
The SRS side and curtain shield airbags may not activate if the vehicle is subjected to a
collision from the side at certain angles, or a collision to the side of the vehicle body other
than the passenger compartment.
The SRS side airbags do not generally inflate if the vehicle is involved in a rear collision, if
it rolls over, or if it is involved in a low-speed side or low-speed frontal collision.
The SRS curtain shield airbags do not generally inflat e if the vehicle is involved in a rear
collision, if it pitches end over end, or if it is involved in a low-speed side or low-speed
frontal collision. ●
Collision from the side ●
Collision from the rear ●
Vehicle rollover
●
Collision from the side to the vehicle body
other than the passenger compartment ●
Collision from the side at an angle
●
Collision from the rear ●
Vehicle rollover
●
Collision from the rear ●
Pitching end over end

491-1. For safe use
LX570_OM_OM60R07U_(U) 1
For safety and security
Front passenger occupant classification system
SRS warning light 
For the U.S.A.
“AIR BAG OFF” indicator light
“AIR BAG ON” indicator light 
For Canada
“AIR BAG OFF” indicator light
“AIR BAG ON” indicator light
Front passenger’s seat belt reminder lightYour vehicle is equipped with a front passenger occupant classification sys-
tem. This system detects the conditions of the front passenger seat and acti-
vates or deactivates the devices for the front passenger.
1
2
3
4
5
6

511-1. For safe use
LX570_OM_OM60R07U_(U) 1
For safety and security ■
Unoccupied
■
There is a malfunction in the system Indicator/
warning light “AIR BAG ON” and “AIR BAG OFF”
indicator lights Not illuminated
SRS warning light
Off
Front passenger’s seat belt reminder light
Devices Front passenger airbag Deactivated
Side airbag
on the front passenger seat
Activated
Curtain shield airbag
in the front passenger side
Front passenger knee airbag
Deactivated
Front passenger’s seat belt pretensioner
Indicator/
warning light “AIR BAG ON” and “AIR BAG OFF”
indicator lights “AIR BAG OFF”
SRS warning light
On
Front passenger’s seat belt reminder light
Devices Front passenger airbag Deactivated
Side airbag
on the front passenger seat
Activated
Curtain shield airbag
in the front passenger side
Front passenger knee airbag Deactivated
Front passenger’s seat belt pretensioner Activated