1998 Lexus LS400 lexus LS400 1998 Engine / LEXUS 1998 LS400 OWNER'S MANUAL (OM50498U)

STARTING AND DRIVING
162
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1
Power mode 2
Normal mode 3
Snow mode
2. Set the driving pattern selector switch to the ”Normal”
position.
Your transmission has a driving pattern selector switch which allows
you to select ”Power”, ”Normal” or ”Snow” mode to suit your
driving condition. For ordinary driving, Lexus recommends that
you use the ”Normal” position to improve fuel economy.
3. For more powerful acceleration and sporty driving, use the
”Power” position.
In the POWER position, 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
position.
For ”Snow” mode, see ”Electronic Throttle Control System” on
page 167.
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1
”D” (Drive) position 2
Brake pedal
4. With your foot holding down the brake pedal, shift the
selector lever to ”D”.
Always use the ”D” position to improve fuel economy and quiet
driving. Only in this position, shifting into the overdrive gear is
possible. However, while the engine coolant temperature is low, the
transmission will not shift into the overdrive gear even in the ”D”
position. (See ”(b) Using engine braking” and ”(f) Good driving
practice” for exceptions.)
CAUTION
Never put your foot on the accelerator pedal while shifting.

STARTING AND DRIVING
163 5. Release the parking brake and brake pedal. Depress the
accelerator pedal slowly for smooth starting.
In normal cruising, the vehicle will start in the first gear and
automatically shift up to the most suitable gear. On inclines, declines
or winding roads, etc., the vehicle shifts up and down automatically
according to the running conditions to obtain the suitable driving
power and engine braking.
In ”4” position, the automatic transmission system will select the
most suitable gear for the running conditions such as hill climbing,
hard towing, etc.
If you need to accelerate rapidly while driving, depress the
accelerator pedal to the full throttle position. This provides more
acceleration by automatically downshifting the transmission to the
next lower gear or beyond, depending on the vehicle speed.
If engine braking is needed, such as in descending a long hill, see ”(b)
Using engine braking”.
(b) Using engine braking
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To use the braking power of the engine, downshift the transmission
in the way described below:
1
Shift into the ”4” position. The transmission will downshift to
the fourth gear and engine braking will be obtained.
When the cruise control is being used, even if you downshift
from ”D” to ”4”, engine braking will not be applied because the
cruise control is not cancelled. If you need to decrease the
vehicle speed, see page 170.
2
Shift into the ”3” position. The transmission will downshift to
the third gear when the vehicle speed is or becomes lower than
154 km/h (96 mph) and more powerful engine braking will be
obtained.

STARTING AND DRIVING
164
3
Shift into the ”2” position. The transmission will downshift to
the second gear when the vehicle speed is or becomes lower
than 104 km/h (65 mph) and more powerful engine braking
than that of ”3” position will be obtained.
4
Shift into the ”L” position. The transmission will downshift to
the first gear when the vehicle speed is or becomes lower than
18 km/h (11 mph) and maximum engine braking will be
applied.
CAUTION
Be careful when downshifting on a slippery surface. The
abrupt change in engine speed could cause the vehicle to spin
or skid.
(c) Using the ”3”, ”2” and ”L” positions
The ”3”, ”2” and ”L” positions are used for strong engine braking as
described previously.
With the selector lever in ”3”, ”2” or ”L”, you can start the vehicle
in motion as with the lever in ”D”.
With the selector lever in ”3” or ”2”, the vehicle will start in the first
gear and automatically shift to the third or second gear.
With the selector lever in ”L”, the transmission is engaged in the first
gear.
NOTICE
Be careful not to overrev the engine. Watch the tachometer
to keep engine rpm from going into the red zone. The
approximate maximum allowable speed for each position is
given below for your reference:
”3” 160 km/h (99 mph). . . .
”2” 104 km/h (65 mph). . . .
”L” 68 km/h (42 mph). . . .
Do not continue hill climbing or hard towing for a long time
in the ”3”, ”2” or ”L” position. This may cause severe
automatic transmission damage from overheating. To
prevent such damage, ”4” position should be used in hill
climbing or hard towing.

STARTING AND DRIVING
165
(d) Backing up
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1
”R” (Reverse) position 2
Brake pedal
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 you are backing up, you can adjust the outside rear view
mirror on the passenger’s side down quickly. For details, see page
78.
(e) Parking
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1
”P” (Park) position 2
Brake pedal
3
Parking brake pedal
1. Bring the vehicle to a complete stop.
2. Depress the parking brake pedal fully.
3. With the brake pedal held down with your foot, shift the selector
lever to the ”P” position.
CAUTION
While the vehicle is moving, never attempt to move the
selector lever into ”P” under any circumstances. Serious
mechanical damage and loss of vehicle control may result.

STARTING AND DRIVING
166
(f) Good driving practice
If the transmission repeatedly upshifts and downshifts between
the 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
Do not hold the vehicle on an upgrade with the accelerator
pedal. This can cause the transmission to overheat. Always use
the brake pedal or parking brake.
(g) Rocking your vehicle if stuck
CAUTION
If your vehicle becomes stuck in snow, mud, sand, etc., then
you may attempt to rock the vehicle free by moving it forward
and backward. Do not attempt this procedure if people or
objects are anywhere near the vehicle. During the rocking
operation the vehicle may suddenly move forward or back as
it becomes unstuck, causing injury or damage to nearby
people or objects.
NOTICE
If you rock your vehicle, observe the following precautions to
prevent damage to the transmission and other parts.
Do not depress the accelerator pedal while shifting the
selector lever or before the transmission is completely shifted
to forward or reverse gear.
Do not race the engine and avoid spinning the wheels.
If your vehicle remains stuck after rocking the vehicle several
times, consider other ways such as towing.

STARTING AND DRIVING
167
(h) 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
209.
(i) If the ”ECT PWR” indicator light flashes
If the ”ECT PWR” indicator light flashes, contact your Lexus dealer
as soon as possible. There may be trouble in the transmission
system.
ELECTRONIC THROTTLE
CONTROL SYSTEM
The electronic throttle control system always maintains
appropriate engine output in relation to the accelerator opening
in all driving conditions.
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Power mode 2
Normal mode 3
Snow mode
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
168In 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 is 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.
CRUISE CONTROL
The cruise control allows you to cruise the vehicle at a desired
speed over 40 km/h (25 mph) with your foot off the accelerator
pedal.
Your cruising speed can be maintained although a slight speed
change may occur when driving up or down a gradient, within the
limits of engine performance. On steeper hills, a great speed change
will occur so it is better to drive without the cruise control.
When the cruise control is on, the driving pattern of the automatic
transmission is fixed in the normal position, regardless of the
position of the selector switch.
CAUTION
To help maintain maximum control of your vehicle, do not
use the cruise control when driving in heavy or varying
traffic, or on slippery (rainy, icy or snowcovered) or
winding roads.
Avoid vehicle speed increases when driving downhill. If the
vehicle speed is too fast in relation to the cruise control set
speed, cancel the cruise control then downshift the
transmission to use engine braking to slow down.

STARTING AND DRIVING
169
Turning on the system
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To operate the cruise control, push the main switch. This turns the
system on. The indicator light in the instrument cluster shows that
you can now set your desired cruising speed. Another push on the
switch will turn the system completely off.
When the ignition key is turned off, the main switch is also
automatically turned off. To use the cruise control again, push the
main switch again to turn it on.
CAUTION
To avoid accidental cruise control engagement, keep the main
switch off when not using the cruise control.
Setting at a desired speed
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The transmission must be in ”D” or ”4” before you set the cruise
control speed.
Bring the vehicle to the desired speed, press the control lever
downward in the ”SET/COAST” direction and release it. This sets
the vehicle at that speed. Now you may take your foot off the
accelerator pedal. If you need acceleration for example, when
passing depress the accelerator pedal enough for the vehicle to
exceed the set speed. When you release the accelerator pedal, the
vehicle will return to the speed set prior to the acceleration.
Cancelling 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.