2000 Lexus LS400 sensor

COMFORT ADJUSTMENT
172

1Side airbag module (airbag and inflator)
2Airbag module for front passenger
(airbag and inflator)
3Side airbag sensor assembly
4Airbag module for driver (airbag and inflator)
5SRS warning light
6Airbag sensor assembly
The SRS airbag system consists mainly of the above
components, and their locations are shown in the
illustration.
The airbag sensor assembly consists of a safing sensor
and airbag sensor.
In a severe frontal impact, the driver and front passenger
airbag sensor detects deceleration and the system
triggers the front airbag inflators. In a severe side
impact, the side airbag sensor triggers the side airbag
inflator. Then a chemical reaction in the inflators quickly
fills the airbags with non±toxic gas to help restrain the
forward or lateral motion of the occupants. When the SRS operates, it produces a fairly loud noise
and release some smoke and residue along with
non±toxic
gas. This does not indicate a fire. This gas is
normally harmless; however, for those who have
delicate skin, it may cause a minor skin irritation. Be
sure to wash off any residue as soon as possible to
prevent any potential skin irritation.
Deployment of the airbags happens in a fraction of a
second, so the airbags must inflate with considerable
force. While the system is designed to reduce serious
injuries, it may also cause minor burns or abrasions and
swelling.
Parts of the airbag module (steering wheel hub,
dashboard, front seats) may be hot for several minutes,
but the airbags themselves will not be hot. The airbags
are designed to inflate only once.
A crash severe enough to inflate the driver and front
passenger airbags may break the windshield as the
vehicle buckles. In vehicles with a front passenger
airbag, the windshield may also be damaged by
absorbing some of the force of the inflating airbag.

COMFORT ADJUSTMENT
181
Do not use accessories for the seats which
cover the parts where the side airbags inflate.
Such accessories may prevent the side airbags
from activating correctly, causing death or
serious injury.
 Do not modify or remove any wiring. Do not
modify, remove, strike or open any
components, such as the steering wheel pad,
steering wheel, column cover, front passenger
airbag cover, front seats or airbag sensor
assembly. Doing any of these may cause
sudden SRS airbag inflation or disable the
system, which could result in death or serious
injury.
 Do not modify or replace the seats or
upholstery of the front seats with side airbags.
Such changes may disable the system or cause
the side airbags to inflate accidentally,
resulting in death or serious injury. Consult
your Lexus dealer if you consider
modifications of this kind.
Failure to follow these instructions can result in
death or serious injury.NOTICE
Do not perform any of the following changes without consulting your Lexus dealer. Suchchanges can interfere with proper operation of the
SRS in some cases.
Installation of electronic devices such as a mobile two±way radio, cassette tape player orcompact disc player.
Modification of the suspension system.
Modification of the front end structure and sidestructure of the passenger compartment.
Attachment of a grille guard (bull bar, k angaroo
bar, etc.), snowplow, winches or any other equipment to the front end.
Repairs made on or near the front fenders, front
end structure, console, steering column, steering wheel, dashboard near the frontpassenger airbag or front seats.

AIR CONDITIONING
232
21L008-4
Each time you push the air intake control button, the
mode changes in order from the RECIRCULATED AIR
mode to AUTOMATIC mode to OUTSIDE AIR mode,
then back to the RECIRCULATED AIR mode. Each
indicator light shows which mode is now selected.
1RECIRCULATED mode ± If quick circulation of
cooled air is desired, select this mode.
2EXHAUST GAS AUTOMATIC mode ± If the
outside air contains harmful substances like
exhaust gas (i.e., when the vehicle running just in
front of your vehicle accelerates rapidly), the
system changes automatically from the OUTSIDE
AIR mode (with indicators
2 and 3 on) to the
RECIRCULATED mode (with indicators 1 and 2 on).
3 OUTSIDE AIR mode ± The system will take fresh
outside air into the vehicle. Turning off the air conditioning manually will cancel the
EXHAUST GAS AUTOMATIC mode. If you select the
ªAUTOº mode during fan operating, the air conditioning
turns on and the EXHAUST GAS AUTOMATIC mode
will operate.
For normal use, it is best to keep the air intake control
button set to OUTSIDE AIR mode. If recirculated air is
used
during heating, the windows will fog up more easily.
To change the sensitivity of the sensor switching
between the RECIRCULATED and OUTSIDE AIR in
the AUTOMATIC mode, push the air intake control
button until you hear a beep. The display changes
as illustrated below.
The sensitivity of the sensor can be adjusted only while
the vehicle has stopped.

STARTING AND DRIVING
325
Anti±lock brake system is not designed to shorten the
stopping distance: Always drive at the moderate speed
and maintain a safe distance from the vehicle in front of
you. Compared with vehicles not fitted with an
anti±lock brake system, your vehicle may require a
longer stopping distance in the following cases:
 Driving on rough, gravel or snow±covered roads.
 Driving with tire chains installed.
 Driving over the steps such as the joints on the road.
 Driving on roads where the road surface is pitted or
has other differences in surface height.
Install all 4 tires of specified size at designated
pressure: The anti±lock brake system detects vehicle
speeds using the speed sensors for respective wheels'
turning speeds. The use of tires other than specified
may fail to detect the accurate turning speed, resulting
in a longer stopping distance.