2005 LEXUS LS430 sensor

GAUGES, METERS AND SERVICE REMINDER INDICATORS
106Displays
Directions
N
NE
E
SE S
SW W
NWNorth
Northeast
East
Southeast South
Southwest West
Northwest
The compass may not show the correct direction in the
following conditions:
 The vehicle is stopped immediately after turning.
The compass does not adjust while the vehicle is stopped.
 The ignition switch is turned off immediately after turning.
 The vehicle is on an inclined surface.
 The vehicle is in a place where the earth’s magnetic field is
subject to interference by artificial magnetic fields
(underground parking, under a steel tower, between
buildings, roof parking, near a crossing, near a large
vehicle, etc.). 
The vehicle is magnetized. (There is a magnet or a metal
object near the audio system.)
 The battery has been disconnected.
If the deviation is small, the compass works to calibrate the
direction automatically while the vehicle is in motion.
For obtaining additional precision or for complete calibrating,
see “CALIBRATING THE COMPASS” on page 107.
COMPASS SENSOR
13L072
 Compass sensor
The compass sensor is located behind the audio system.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
107
NOTICE
Do not put magnets or a metal object near the audio
system. Doing this may cause malfunction of the
compass sensor.
CALIBRATING THE COMPASS
The direction display on the compass deviates from the true
direction determined by the earth’s magnetic field. The
amount of deviation varies according to the geographic
position of the vehicle.
If you cross over the area divided as shown in the illustration,
the compass will deviate. If it is necessary to calibrate the
compass (deviation calibration), take your vehicle to your
Lexus dealer. Even if you do not cross over, the compass may
sometimes deviate. If this happens, perform “DRIVE IN
CIRCLES” calibration as shown on the next page.
13L196

OCCUPANT RESTRAINT SYSTEMS
176
Seat belt pretensioners
16L645
Both front seats and the two outboard rear seats are
equipped with seat belt pretensioners and are designed to
be activated in response to a severe frontal impact.
When the sensor detects a severe frontal impact, the seat belts
are quickly drawn back by the retractor so that the belts snugly
restrain the seat occupants.
The front passenger seat belt pretensioner will not activate if
there is no passenger sitting in the front passenger seat.
However, the front passenger seat belt pretensioner may
activate if luggage is put in the seat, or the seat belt is buckled
up regardless of the presence of the occupant in the seat.
The outboard rear seat belt pretensioners are activated even
with no passengers in the outboard rear seats.
The seat belt pretensioners and SRS airbags may not operate
together in all collisions.
16L649a
 1 Front airbag sensors
2Occupant detection sensor
3Front passenger’s seat belt buckle switch
4Front seat belt pretensioner assembly
5SRS warning light
6Rear seat belt pretensioner assembly
7Airbag sensor assembly
The seat belt pretensioner system consists mainly of the
above components, and their locations are shown in the
illustration.
The seat belt pretensioners are controlled by the airbag sensor
assembly. The airbag sensor assembly consists of a safing
sensor and airbag sensor.

OCCUPANT RESTRAINT SYSTEMS
177
When the seat belt pretensioners are activated, an operating
noise
may be heard and a small amount of non −toxic gas may
be released. This does not indicate that a fire is occurring. This
gas is normally harmless.
Once the seat belt pretensioners have been activated, the seat
belt retractors remain locked.
CAUTION
Do not modify, remove, strike or open the seat belt
pretensioner assemblies, airbag sensor or surrounding
area or wiring. Failure to follow these instructions may
prevent the seat belt pretensioners from activating
correctly, cause sudden operation of the system or
disable the system, which could result in death or
serious injury. Consult your Lexus dealer about any
repair and modification.
NOTICE
Do not perform any of the following changes without
consulting your Lexus dealer. Such changes can
interfere with proper operation of the seat belt
pretensioners in some cases.
 Installation of electronic devices such as a mobile
twoway radio, cassette tape player or CD player.
 Repairs on or near the seat belt retractor assemblies.
 Modification of the suspension system.
 Modification of the front end structure.
 Attachment of a grille guard (bull bar, kangaroo bar,
etc.), snowplow, winches or any other equipment to
the front end.
 Repairs made on or near the front fenders, front end
structure or console.

OCCUPANT RESTRAINT SYSTEMS
178
16L330b
This indicator comes on when the ignition switch is turned
to the “ON” position. It goes off after about 6 seconds.
This means the seat belt pretensioners are operating
properly.
This warning light system monitors the airbag sensor
assembly, front airbag sensors, side and curtain shield airbag
sensor assemblies, curtain shield airbag sensor assemblies,
driver’s seat position sensor, driver’s seat belt buckle switch,
occupant detection sensor, front passenger’s seat belt buckle
switch, seat belt pretensioner assemblies, inflators, warning
light, interconnecting wiring and power sources. (For details,
see “Service reminder indicators and warning buzzers” on
page 82.) If any of the following conditions occurs, this indicates a
malfunction of the airbags or seat belt pretensioners. Contact
your Lexus dealer as soon as possible.

When the ignition switch is turned to the “ON” position, the
light does not come on or remains on for more than 6
seconds.
 The light comes on while driving.
 If any seat belt does not retract or cannot be pulled out due
to a malfunction or activation of the relevant seat belt
pretensioner.
 The seat belt pretensioner assembly or surrounding area
has been damaged.

OCCUPANT RESTRAINT SYSTEMS
183
16L653a
 1Occupant detection sensor
2Airbag module for front passenger
(airbag and inflator)
3 Knee airbag module for front passenger
(airbag and inflator)
4 Front passenger’s seat belt buckle switch
5SRS warning light
6Airbag module for driver (airbag and inflator)
7Knee airbag module for driver (airbag and inflator)
8Driver’s seat belt buckle switch
9Driver’s seat position sensor
10Airbag sensor assembly
11Front airbag sensors
The SRS front 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 sensors. The front airbag sensors constantly monitor the forward
deceleration of the vehicle. If an impact results in a forward
deceleration beyond the designed threshold level, the system
triggers
the airbag inflators. At this time a chemical reaction in
the inflators very quickly fills the airbags with non−toxic gas to
help restrain the forward motion of the occupants. The front
airbags then quickly deflate, so that there is no obstruction of
the driver’s vision should it be necessary to continue driving.
When the airbags inflate, they produce a loud noise and
release some smoke and residue along with non −toxic gas.
This does not indicate a fire. This smoke may remain inside
the vehicle for some time, and may cause some minor irritation
to the eyes, skin or breathing. Be sure to wash off any residue
as soon as possible to prevent any potential skin irritation with
soap and water. If you can safely exit from the vehicle, you
should do so immediately.

OCCUPANT RESTRAINT SYSTEMS
186
16L794
Do not put anything or any part of your body on or in
front of the dashboard, lower portion of instrument
panel, steering wheel pad that houses the front
airbag system or in the areas where the SRS knee
airbags will inflate. They might restrict inflation or
cause death or serious injury as they are projected
rearward by the force of the deploying airbags.
Likewise, the driver and front passenger should not
hold objects in their arms or on their knees.
 If a vinyl cover is put on the area where the SRS knee
airbag will deploy, be sure to remove it.
Do not attach any objects except Lexus genuine
parts in the area where the SRS knee airbag for the
front passenger will inflate. When using an ashtray
or auxiliary box on the front passenger’s console
box, be sure to keep it closed. The attached object, or
opened ashtray or auxiliary box might restrict
inflation of the airbag or be thrown away by the force
of the deploying airbag, causing a danger.
 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,
dashboard near the front passenger airbag, front
passenger airbag cover, front passenger airbag,
knee airbags or airbag sensor assembly. Doing so
may prevent the front airbag system from activating
correctly, cause sudden activation of the system or
disable the system, which could result in death or
serious injury.
Failure to follow these instructions can result in death
or serious injury. Consult your Lexus dealer about any
repair and modification.

OCCUPANT RESTRAINT SYSTEMS
188
16L330b
The indicator comes on when the ignition switch is turned
to the “ON” position. It goes off after about 6 seconds.
This means the SRS front airbags are operating properly.
This warning light system monitors the airbag sensor
assembly, front airbag sensors, side and curtain shield airbag
sensor assemblies, curtain shield airbag sensor assemblies,
driver’s seat position sensor, driver’s seat belt buckle switch,
occupant detection sensor, front passenger’s seat belt buckle
switch, seat belt pretensioner assemblies, inflators, warning
light, interconnecting wiring and power sources. (For details,
see “Service reminder indicators and warning buzzers” on
page 82.) If any of the following conditions occurs, this indicates a
malfunction of the airbags or seat belt pretensioners. Contact
your Lexus dealer as soon as possible.

When the ignition switch is turned to the “ON” position, the
light does not come on or remains on for more than 6
seconds.
 The light comes on while driving.