LEXUS LS430 2005 Owners Manual

STARTING AND DRIVING
312Vehicles with the cruise control —
When
the cruise control is being used, even if you downshift
from “D” or “5” (fifth range) to “4” (fourth range)\
, engine
braking will not be enabled because the cruise control is not
cancelled. For vehicle speed reduction, see page 328.
Vehicles with the dynamic radar/laser cruise control —
When the cruise control is being used in the conventional
(fixed speed) cruise control mode or in the
vehicle −to−vehicle distance control mode, even if you
downshift from “D” or “5” (fifth range) to “4” (fourth range),
engine braking will not be enabled because the cruise
control is not cancelled. For vehicle speed reduction, see
pages 359 and 344.
 Shift into the “3” (third range) position. The transmission will
downshift to third gear when the vehicle speed is or
becomes lower than 146 km/h (91 mph) and more powerful
engine braking will be enabled.
If you drive in the “D” position: Shift the selector lever to
the “S” position and shift the lever down to the “–” posi\
tion
twice to select the “3” (third range). However, when you
move the lever to the “S” position while the AI shifting control
is operating, the first shift range will be “5” (fifth range), “\
4”
(fourth range) or “3” (third range) because the suitable shift
range is selected depending on the driving condition.
If you drive in the “S” position: Shift the selector lever
down to the “–” position to select “3” (third range). 
Shift into the “2” (second range) position. The transmission
will downshift to second gear when the vehicle speed is or
becomes lower than 98 km/h (61 mph) and more powerful
engine braking than that of the “3” (third range) position will
be enabled.
If you drive in the “D” position: Shift the selector lever to
the “S” position and shift the lever down to the “–” posi\
tion
three times to select “2” (second range).
If you drive in the “S” position: Shift the selector lever
down to the “–” position to select “2” (second range).
 Shift into the “1” (first range) position. The transmission will
downshift to first gear when the vehicle speed is or becomes
lower than 35 km/h (22 mph) and maximum engine braking
will be enabled.
If you drive in the “D” position: Shift the selector lever to
the “S” position and shift the lever down to the “–” posi\
tion
four times to select “1” (first range).
If you drive in the “S” position: Shift the selector lever
down to the “–” position to select “1” (first range).
CAUTION
Be careful when downshifting on a slippery surface.
The abrupt change in engine speed could cause the
vehicle to skid or spin.

STARTING AND DRIVING
313
(d) Backing up
31L324
 1Brake pedal 2“R” (Reverse) position
1. Bring the vehicle to a complete stop.
2. With the brake pedal held down with your foot, shift the
selector lever to the “R” position.
NOTICE
Never shift into reverse while the vehicle is moving.
When the selector lever is shifted into the “R” position, the
outside rear view mirrors automatically down to help backing
up. For details, see “Power rear view mirror control” on page
231.
Vehicles with rear view monitor system: When the selector
lever is shifted into the “R” position with the ignition switch in\
the “ON” position, rear view monitor system will activate. For
instructions, see “Rear view monitor system” on page 323.

STARTING AND DRIVING
314
(e) Parking
31L325
 1Parking brake pedal 2Brake pedal
3“P” (Park) position
1. Bring the vehicle to a complete stop.
2. Depress the parking brake pedal fully to securely apply the
parking brake.
3. With the brake pedal held down with your foot, shift the
selector lever to the “P” position.
CAUTION
Never attempt to move the selector lever into “P” under
any circumstances while the vehicle is moving. Serious
mechanical damage and loss of vehicle control may
result.
(f) Good driving practice
 If the transmission repeatedly shifts up and down between
fourth and overdrive gears when climbing a gentle slope,
shift the selector lever to the “4” position. Be sure to shift the
selector lever to the “D” position after climbing the slope.
 When towing a trailer, in order to maintain efficient engine
braking and electrical charging performance, do not use
overdrive. The selector lever must be in the “4” position.
CAUTION
Always keep your foot on the brake pedal while stopped
with the engine running. This prevents the vehicle from
creeping.
NOTICE
Always use the brake pedal or the parking brake to hold
the vehicle on an upgrade. Do not attempt to hold the
vehicle using the accelerator pedal, as this can cause
the transmission to overheat.

STARTING AND DRIVING
315
(g) If you cannot shift the selector lever
If you cannot shift the selector lever even though the brake
pedal is depressed, use the shift lock override button. For
instructions, see “If you cannot shift automatic transmission
selector lever” on page 423.
ELECTRONIC THROTTLECONTROL SYSTEM
The electronic throttle control system always maintains
appropriate engine output in relation to the accelerator
opening in all driving conditions.
31L322
 1Power position 2Normal position
3Snow position
The electronic throttle control system has 3 modes:
Normal, Power and Snow modes.
Normal mode: For ordinary driving, Lexus recommends that
you use the normal mode to improve fuel economy.
Power mode: For more powerful acceleration and sporty
driving.

STARTING AND DRIVING
316In the power mode, the “ECT PWR” light in the instrument
cluster is on and the transmission is shifted up at higher vehicle
speeds and shifted down more responsively
than in the normal
mode.
To return to the normal mode, push the driving pattern selector
switch lightly on the “SNOW” side.
Snow mode: For slippery road surfaces such as in snow. In
this mode, the spinning of the rear wheels is controlled
appropriately.
When you push the driving pattern selector switch on the
“SNOW” side, the snow mode is turned on and the “ECT
SNOW” light in the instrument cluster comes on.
To return to the normal mode, push the driving pattern selector
switch on the “SNOW” side again.
When you turn the ignition switch off in the snow mode, the
mode automatically changes to the normal mode.
LEXUS PARK ASSIST SYSTEM
31L354b
 Sensors
The Lexus park assist system will help you to easily park
by detecting any obstacle around your vehicle with
ultrasonic sensors and informing you of the approximate
distance from the vehicle to the obstacle with the
indicators on the display and with beeping sounds.*
This system will operate at a vehicle speed of less than about
10 km/h (6 mph) with the selector lever in a position other than
“P”.
NOTE:
* The volume of the beeps can be changed.
Ask your Lexus dealer for details.

STARTING AND DRIVING
317
31L340
You can use this system in either of the following ways.
Push the main switch of the Lexus park assist system with
the ignition on. A beep sounds for one second. After the
system self− check is performed, the Lexus park assist
system screen appears for 2 seconds.
 Push the main switch of the Lexus park assist system and
turn the ignition on. The Lexus park assist system screen
appears for 2 seconds and a system self −check is
performed. At this time, a beep does not sound.
If an error is detected in the Lexus park assist system while
self−checking, beeps sound and the message appears in the
multi− information display. For details, see “Lexus park assist
system failure warning” on page 319. Up to 4 indicator bars are shown on the front and rear sides of
the vehicle mark and up to 3 indicator arcs are shown on each
corner of the vehicle mark. The number of indicators shows
the approximate range up to the obstacle. The indicator marks
disappear one
−by−one as your vehicle comes closer to the
obstacle. Also, as you get closer to the obstacle, the beeping
interval becomes shorter.
To turn off the system, push the main switch again.
NOTICE
 If an accident should occur, the sensors will be
affected, resulting in a system failure.
 If the indicators remain on the display but you do not
hear a beeping sound, the system may be
malfunctioning. Contact your Lexus dealer.

STARTING AND DRIVING
318
Indicators and beeps
34L148b
Front or rear obstacles
Depending on the distance between your vehicle and the
obstacle, the display and beeps change as follows:
1 About 50 cm (1.5 ft.) to about 100 cm (3.0 ft.)*: 4 bars
appear on the front or rear side of the vehicle mark where
the obstacle is detected. If the obstacle is detected on the
rear side of the vehicle, the beeps remind you that your
vehicle is getting closer to the obstacle by sounding
intermittently.
2 About 37.5 cm (1.1 ft.) to about 50 cm (1.5 ft.): The
number of bars will decrease from 4 to 3, and the beeps
sound at shorter intervals than in step
1.
3 About 25 cm (0.8 ft.) to about 37.5 cm (1.1 ft.): The
number of bars will decrease from 3 to 2. The beeps
sound at shorter intervals than in step
2.
4 Less than about 25 cm (0.8 ft.): The number of bars will
decrease from 2 to 1, and the bar blinks while the beeps
sound continuously.
NOTE:
* The beeps can be activated or deactivated.
Ask your Lexus dealer for details.

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
320
W285
If the sensor is malfunctioning or a cable is broken, the
above message appears.
Although it is no problem to continue driving, have your vehicle
checked by your Lexus dealer as soon as possible.
W286
If icicles, snowflakes or mud gets on the sensor or it is
frozen, the sensor may not be able to detect an obstacle.
In either case, the above message appears.
Remove the foreign matter or deice the sensor. If the message
does not appear after cleaning, the system is operating
properly.
Lexus park assist system operating hints
31L355
 Sensor detection range
1
About 1 m (3 ft.) 2About 50 cm (1.5 ft.)
The sensor detection range is limited around the bumper.
Be sure to confirm a safe distance around your vehicle
and drive slowly.
If more than one obstacle is detected in the same
direction, the indicators for the obstacle nearest to the
vehicle will turn on.

STARTING AND DRIVING
321
CAUTION
Do not install an accessory or the like within the sensor
detection range. Doing so may cause the Lexus park
assist system to malfunction, resulting in an accident.
NOTICE
The sensors do not detect an obstacle just under the
bumper. A short object, thin stake or the like will be
detected once but might not be detected as your
vehicle gets very close to such an object.
 If an obstacle is very close to your vehicle, it might
not be detected.
 If a sensor is subjected to a strong impact, it will not
operate properly.
The Lexus park assist system may not work properly in
the following cases:
When icicles, snowflakes or mud gets on the sensors.
If removed, the system will work properly.
 When the sensor is frozen.
If deiced, the system will work properly.
 When the sensor is covered with something.
If removed, the system will work properly. Especially in cold weather, a malfunction warning screen may
appear on
the display due to frozen sensors. If the “Clean Park
Sonar” appears on the display, be sure to clean the sensor. If
the “Clean Park Sonar” appears despite no mud, ice or
snowflakes on the sensor, the sensor might have
malfunctioned. Have your vehicle checked by your Lexus
dealer.
In the following conditions, the detection range may be
affected:
 When you stop your vehicle in extreme hot or cold weather.
 Foreign matter such as snowflakes or mud gets on the
sensor.