Lexus LS 500 2019 Owner's Manual page 31

Driver's seat position sensor
P
Driver's seat belt buckle switch
Q
Airbag sensor assembly
R
Front impact sensors
S
Pop Up Hood computer assembly
T
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 sensors 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.
If the SRS airbags deploy (inflate)
■
● Slight abrasions, burns, bruising etc., may
be sustained from SRS airbags, due to the
extremely high speed deployment (infla-
tion) 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 seats, parts of the front and
rear pillars, and roof side rails, may be hot
for several minutes. The airbag itself may
also be hot.
● The windshield may crack.
All of the doors will be unlocked.
●
(P.101)
● The brakes and stop lights will be con-
trolled automatically. (P.294)
● The interior lights will turn on automati-
cally. (P.334)
● The emergency flashers will be turned on
automatically. (P.406)
● Fuel supply to the engine will be stopped.
(P.414)
For Lexus Enform Safety Connect sub-
●
scribers, if any of the following situations
occur, 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" but-
LS500_OM_(U)_1810
1-1. For safe use
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 communi-
cate, the agent automatically treats the
call as an emergency and helps to dis-
patch the necessary emergency services.
(P.58)
• An SRS airbag is deployed.
• A seat belt pretensioner is activated.
• The vehicle is involved in a severe
rear-end collision.
PCS-linked SRS airbag deployment
■
control (vehicles with Lexus Safety Sys-
tem + A)
If the PCS (Pre-Collision System) deter-
mines that the possibility of a side collision is
high, the SRS side and curtain shield air-
bags will be prepared to operate.
■ SRS airbag deployment conditions (SRS
front airbags/SRS seat cushion airbags)
The SRS front airbags and SRS seat cush-
●
ion airbags will deploy in the event of an
impact that exceeds the set threshold
level (the level of force corresponding to
an approximately 12 - 18 mph [20 - 30
km/h] frontal collision with a fixed wall
that does not move or deform).
However, this threshold velocity will be
considerably higher in the following situa-
tions:
• If the vehicle strikes an object, such as a
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