warning light LEXUS LS430 2005 Owner's Guide

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
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.

OCCUPANT RESTRAINT SYSTEMS
192
16L656
 1Collision from the front
2Collision from the rear
3Vehicle rollover
The SRS side airbags and curtain shield airbags are not
generally designed to inflate if the vehicle is involved in a
front or rear collision, if it rolls over, or if it is involved in
a lowspeed side collision.
16L657
 1 Curtain shield airbag module (airbag and inflator)
2Side airbag module (airbag and inflator)
3Curtain shield airbag sensor assembly
4Side and curtain shield airbag sensor assembly
5SRS warning light
6Airbag sensor assembly
The SRS side airbag and curtain shield airbag system consists
mainly of the above components, and their locations are
shown in the illustration.
The SRS side airbag and curtain shield airbag system is
controlled by the airbag sensor assembly. The airbag sensor
assembly consists of a safing sensor and airbag sensor.

OCCUPANT RESTRAINT SYSTEMS
197
NOTICE
Do not perform any of the following changes without
consulting your Lexus dealer. Such changes can
interfere with proper operation of the SRS side airbag
and curtain shield airbag system in some cases.
Installation of electronic devices such as a mobile
twoway radio, cassette tape player or CD player.
 Modification of the suspension system.
 Modification of the structure of the passenger
compartment.
 Repairs made on or near the console or front seat.
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 side airbags and curtain shield
airbags are operating properly.
This warning light system monitors the airbag sensor
assembly, front airba g 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.)

STARTING AND DRIVING
299
31L346a
When you enter the vehicle carrying a sm art key and push
the ignition switch, the electronic code in the key is
automatically checked as to whether it corresponds to the
registered ID code for the vehicle. The key indicator light
comes on, the steering column lock is released, and the
engine immobilizer system is cancelled.
At this time, the security indicator light goes off and you can
start the engine when you turn the ignition switch and the key
indicator light does not come on. When you turn the ignition
switch, turn it slowly and surely. If you turn it quickly, it may
become stuck. To free it, see the following “If the ignition switch
seems to be stuck”.
If you push the ignition switch when the smart key is not within
the effective range of the smart key system, a warning tone
sounds and “Key is not Detected” appears on the display. If the ignition switch seems to be stuck:
To free the ignition switch, perform the following:
31L638
1. Push the ignition switch.
31L639
2. Be sure to push the ignition switch while turning the
steering wheel slightly in either direction, and then turn
the switch.

STARTING AND DRIVING
310“4” (fourth range):
The most suitable gear is automatically
selected between first and fourth gears according to vehicle
speed and driving conditions. In the “4” (fourth range)
position, the automatic transmission system will select the
most suitable gear to handle current running conditions
such as hill climbing, hard towing, etc.
“3” (third range): The most suitable gear is automatically
selected between first and third gears according to vehicle
speed and driving conditions. This range is best used when
stronger engine braking is necessary.
“2” (second range): First or second gear will automatically
be selected according to vehicle speed and driving
conditions. This range is to be used when engine braking
stronger than that of the “3” (third range) position is
necessary.
“1” (first range): This gear is fixed in first regardless of
vehicle speed or driving conditions. This range is to be used
when maximum engine braking is necessary.
If you attempt to downshift the transmission when it is not
possible to downshift due to high vehicle speed, a warning tone
sounds twice. 
Maximum allowable speeds
To get on a highway or to pass slower traffic, maximum
acceleration may be necessary. Make sure you observe the
following maximum allowable speeds in each range:
range km/h (mph)1 59 (36)
2 100 (62)
3 146 (90)
NOTICE
Do not downshift if you are going faster than the
maximum allowable speed for the next lower range.
 “S” mode indicator light
“S” mode allows you to use the shift range positions.
The “S” mode indicator light comes on when the selector
lever is shifted into the “S” position. When the “S” mode
indicator light does not come on even with the selector lever
moved to the “S” position, there may be a problem
somewhere in the system. Have your vehicle
checked/repaired by your Lexus dealer as soon as
possible. In this case, you can drive in the same condition
as in the “D” position.

STARTING AND DRIVING
319
31L149b
Corner obstacles
Depending on the distance between your vehicle and the
obstacle, the display and beeps change as follows:
1 About 37.5 cm (1.1 ft.) to about 50 cm (1.5 ft.): 3 arcs
appear on the corner of the vehicle mark where the
obstacle is detected. At this time, the beeps remind you
that your vehicle is getting closer to the obstacle by
sounding intermittently.
2 About 25 cm (0.8 ft.) to about 37.5 cm (1.1 ft.): The
number of arcs will decrease from 3 to 2. The beeps
sound at shorter intervals than in step
1.
3 Less than about 25 cm (0.8 ft.): The number of arcs will
decrease from 2 to 1, and the bar blinks while the beeps
sound continuously.
Lexus park assist system failure warning
31L351
The system self check is automatically performed when
the Lexus park assist system is turned on. At this time if
an error is detected, the master warning light comes on
accompanied by 5 beeps, the faulty sensor blinks and
either of the following messages appear in the
multiinformation display.
 “Check Park Sonar”
 “Clean Park Sonar”
The sensors operate individually. When one sensor is
malfunctioning, you will notice sounding beeps and blinking
indicators to show that it is malfunctioning. If another sensor
detects an obstacle during this time, the approximate distance
to the obstacle will be shown by that sensor.

STARTING AND DRIVING
328
2Cancelling the preset speed
You can cancel the preset speed by either of the following:
a. Pulling the control lever in the “CANCEL” direction.
b. Depressing the brake pedal.
c. Pushing the “ON −OFF” button.
If the vehicle speed falls below about 40 km/h (25 mph), the
preset speed will be automatically cancelled.
If the vehicle speed drops 16 km/h (10 mph) below the preset
speed, the preset speed will also automatically be cancelled.
If the slip indicator light blinks and a warning tone sounds, the
preset speed will be automatically cancelled.
If the preset speed automatically cancels out for other than the
above reasons, do not operate the cruise control. Although it
is no problem to continue driving, have your vehicle checked
by your Lexus dealer at the earliest opportunity.
3 Resetting to a faster speed
Press the control lever upward in the “+ RES” direction and
hold it. Release the lever when the desired speed is attained.
While the lever is held upward, the vehicle will gradually gain
speed.
When the difference between the actual vehicle speed and the
set speed is less than 5 km/h (3 mph), the set speed can be
increased 1. 6 km/h (1 mph) each time by pressing the control
lever upward in the “+ RES” direction quickly within 0.6
seconds. However, a quicker way to reset is to accelerate the vehicle
and then press the control lever downward in the “– SET”
direction.
4
Resetting to a slower speed
Press the co ntrol lever downward in the “– SET” direction and
hold it. Release the lever when the desired speed is attained.
While the lever is held downward, the vehicle speed will
gradually decrease.
When the difference between the actual vehicle speed and the
set speed is less than 5 km/h (3 mph), the set speed can be
lowered 1.6 km/h (1 mph) each time by pressing the control
lever downward in the “– SET” direction quickly within 0.6
seconds.
However, a quicker way to reset is to depress the brake pedal
and then press the control lever downward in the “– SET”
direction.
With the cruise control on, even if you downshift the
transmission from the “D” position or “6” (sixth range) to the “5”\
(fifth range), or from the “D” position or “5” (fifth ran\
ge) to the
“4” (fourth range), engine braking will not be enabled because
the cruise control is not cancelled. To decrease the vehicle
speed, reset to a slower speed with the cruise control lever or
depress the brake pedal. If you use the brake pedal, cruise
control is cancelled.

STARTING AND DRIVING
329
5Resuming the preset speed
If the preset speed is cancelled by pulling the control lever, by
depressing the brake pedal or vehicle stability control
activation, pushing the lever up in the “+ RES” direction will
restore the speed set prior to cancellation. However, once the
vehicle speed falls below about 40 km/h (25 mph), the preset
speed will not be resumed.
Cruise control failure warning
If the “CRUISE” indicator light in the instrument cluster flashes
when using the cruise control, push the “ON −OFF” button to
turn the system off and then push it again to turn it on.
If any of the following conditions then occurs, there is some
trouble in the cruise control system.
 The indicator light does not come on.
 The indicator light flashes again.
 The indicator light goes out after it comes on.
If this is the case, contact your Lexus dealer and have your
Lexus inspected.
DYNAMIC RADAR/LASER CRUISE CONTROL
The vehicles with precollision safety system are
equipped with dynamic radar cruise control. For the
vehicles without precollision safety system, dynamic
laser cruise control can be equipped as optional.
Dynamic radar/laser cruise control allows you to drive at
a selected cruising speed over about 45 km/h (28 mph)
with your foot off the accelerator pedal, maintaining an
appropriate vehicletovehicle distance.
31L359a
Dynamic radar cruise control
(Vehicles with precollision safety system)
1 Millimeter wave grille cover
2Millimeter wave radar sensor

STARTING AND DRIVING
330
31L363
Dynamic laser cruise control
(Vehicles without precollision safety system)
1 Laser radar sensor
31L631
Inside view
1
Master warning light 2Multiinformation display
3“CRUISE” indicator light
4DISP2 switch (for changing vehicletovehicle
distance)
5 Cruise control lever
The dynamic radar/laser cruise control function has 2 cruise
control modes: vehicle−to−vehicle distance control mode for
maintaining an appropriate distance between vehicles, and a
conventional (fixed speed) cruise control mode for cruising at
preset speeds.