gear Lexus GS300 2006 Starting and Driving

SECTION 3 – 1
339
STARTING AND DRIVING
Starting and driving
Three−way catalytic converters340 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine exhaust caution341 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating the engine switch342 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking brake352 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic transmission353 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic throttle control system364 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intuitive parking assist365 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear view monitor system388 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise control392 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dynamic radar cruise control395 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adaptive variable suspension system417 . . . . . . . . . . . . . . . . . . . . . . .
Traction control system418 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle stability control system420 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hill−start assist control system422 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variable gear ratio steering system424 . . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle dynamics integrated management426 . . . . . . . . . . . . . . . . . . .
Brake system427 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake pad wear limit indicators431 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electric power steering system432 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire pressure warning system433 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pre−collision system443 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STARTING AND DRIVING
355
G31023

1
Power position 2
Normal position
3
Snow position
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 mode to improve fuel economy.
3. For more powerful acceleration and sporty driving, use
the power position.
In the power mode, the “ECT PWR” light in the instrument
cluster is on and the most suitable shift pattern is selected
depending on the driver’s operation of accelerator and brake
pedal and on the vehicle condition. See “Automatic shifting
point change control” on page 356.
For snow mode, see “Electronic Throttle Control System”
on page 364.
G31024

1
Brake pedal 2
“D” (Drive) position
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 “(c) Using engine braking” and “(f)
Good driving practice” for exceptions.)
CAUTION
Never put your foot on the accelerator pedal while
shifting.

STARTING AND DRIVING
3565. Release the parking brake and brake pedal. Depress
the accelerator pedal slowly for smooth starting.
In normal cruising, the vehicle will start in 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.
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 “(c) Using engine braking”.AI (Artificial Intelligence) shifting control
AI shifting control selects the most suitable shift range
automatically according to the driver’s operation and
driving condition.
AI shifting control operates automatically with the
selector lever in the “D” position. When the lever is moved
to the “S” position, this function will be canceled.
Shifting control on the slope: On inclines, you can drive
smoothly with reduced shifting quantity. On declines, the
vehicle will shift down automatically to obtain optimum engine
braking and reduce the driver’s foot braking load.
Automatic shifting point change control: The automatic
shifting point control is controlled in the following way to
respond to the driver’s operation.
When the accelerator is depressed quickly, the vehicle
downshifts rapidly in order to improve acceleration.
When the accelerator is quickly released, the gear position
is maintained in order to improve engine braking and
reacceleration capabilities.
During hard deceleration the vehicle downshifts rapidly in
order to improve engine braking and reacceleration
capabilities.

STARTING AND DRIVING
357
(b) Driving in “S” mode
G31025

1
“S” mode position
2
Upshifting
3
Downshifting
4
Shift range position indicator
You can change the shift range position in the “S” mode.
The shift range position can be switched between “6”
(sixth range) and “1” (first range) by moving the selector
lever up to the “+” side or down to the “–” side. The first
shift range position is “5” (fifth range) when the selector
lever is shifted to the “S” position.
However, if you move the lever to the “S” position in AI
shifting control, “5” (fifth range), “4” (fourth range) or “3”
(third range) will be the first shift range. This is because
the suitable shift range is selected depending on the
driving condition.
G31026

Shift range position indicator
The shift range position is displayed on the instrument cluster.
Shift range positions
“6” (sixth range): The most suitable gear is automatically
selected between first and overdrive (sixth) gears according
to vehicle speed and driving conditions. Always use the “6”
(sixth range) position to improve fuel economy and for quiet
driving.
“5” (fifth range): The most suitable gear is automatically
selected between first and fifth gears according to vehicle
speed and driving conditions. This range is suitable for
acceleration such as when you want to pass a vehicle
running ahead of you during high speed driving.

STARTING AND DRIVING
358“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)
GS430:1 57 (35)
2 97 (60)
3 141 (88)
range km/h (mph)
GS300 (2WD):1 54 (33)
2 93 (58)
3 137 (85)
range km/h (mph)
GS300 (4WD):1 52 (32)
2 90 (56)
3 131 (81)
NOTICE
Do not downshift if you are going faster than the
maximum allowable speed for the next lower range.

STARTING AND DRIVING
359 “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.
(c) Using engine braking
G31027

“S” mode position
To use the braking power of the engine, downshift the range in
the “S” mode position as follows:
Shift into the “5” (fifth range) position. The transmission will
downshift to fifth gear and engine braking will be enabled.
If you drive in the “D” position: Shift the selector lever to
the “S” position and “5” (fifth range) will automatically be
selected.
If you drive in the “S” position: Shift the selector lever
down to the “–” position by selecting the “5” (fifth range).

STARTING AND DRIVING
360When the cruise control is being used, even if you downshift
from “D” or “6” (sixth range) to “5” (fifth range), engine
braking will not be enabled because the cruise control is not
cancelled. For vehicle speed reduction, see page 394.
Vehicles with the dynamic radar 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 “6” (sixth range) to “5” (fifth range),
engine braking will not be enabled because the cruise
control is not cancelled. For vehicle speed reduction, see
pages 416 and 404.
Shift into the “4” (fourth range) position. The transmission
will downshift to fourth gear when the vehicle speed is or
becomes lower than the speed listed below and more
powerful engine braking will be enabled.
GS430193 km/h (120 mph)
GS300 (2WD)187 km/h (116 mph)
GS300 (4WD)178 km/h (111 mph)
If you drive in the “D” position: Shift the selector lever to
the “S” position and shift the lever down to the “–” position
once to select “4” (fourth 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 the “4” (fourth range).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 394.
Vehicles with the dynamic radar 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 416 and 404.
Shift into the “3” (third range) position. The transmission will
downshift to third gear when the vehicle speed is or
becomes lower than the speed listed below and more
powerful engine braking will be enabled.
GS430144 km/h (90 mph)
GS300 (2WD)135 km/h (84 mph)
GS300 (4WD)129 km/h (80 mph)
If you drive in the “D” position: Shift the selector lever to
the “S” position and shift the lever down to the “–” position
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).

STARTING AND DRIVING
361 Shift into the “2” (second range) position. The transmission
will downshift to second gear when the vehicle speed is or
becomes lower than the speed listed below and more
powerful engine braking than that of the “3” (third range)
position will be enabled.
GS43099 km/h (62 mph)
GS300 (2WD)93 km/h (58 mph)
GS300 (4WD)89 km/h (55 mph)
If you drive in the “D” position: Shift the selector lever to
the “S” position and shift the lever down to the “–” position
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 the speed listed below and maximum engine
braking will be enabled.
GS43037 km/h (23 mph)
GS300 (2WD)38 km/h (23 mph)
GS300 (4WD)36 km/h (22 mph)
If you drive in the “D” position: Shift the selector lever to
the “S” position and shift the lever down to the “–” position
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
363
(e) Parking
G31029

1
Parking brake pedal 2
Brake 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.
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
424
Hill−start assist control system failure
warning
G31039

1
GS430 2
GS300
If the hill−start assist control system malfunctions, the
slip indicator light (two−wheel drive models only) and
brake system warning light (yellow) come on. At this time,
the above message appears. (GS430 only—In some
cases, the multi−information display shows either
“CHECK VSC” or “CHECK ECB” only.)
If the message appears, the hill−start assist control system,
vehicle stability control system and traction control system do
not work. Although it is no problem to continue driving, have
your vehicle checked by your Lexus dealer as soon as
possible.
VARIABLE GEAR RATIO
STEERING SYSTEM
(GS430 only)
The variable gear ratio steering system adjusts the wheel
turning angle depending on the vehicle speed and how
much you turn the steering wheel.
The vehicle wheel turning angle will be changed with a smaller
degree of wheel maneuvering when you are driving at very low
speed such as when putting your vehicle into a garage.
When you start or stop the engine, you may hear a small noise
and the steering wheel may move slightly. This is caused when
the system starts or stops, and does not indicate a malfunction.
In the following cases, to prevent the system from overheating,
the system could be temporarily deactivated with the change
in the center position of the steering wheel. This is not a
malfunction. After the cause of the problem is eliminated, the
system will return to normal automatically after a few minutes.
If you continue maneuvering the steering wheel when the
vehicle is stopped or running at very low speed
If you continue driving holding the steering wheel to the
extreme right or left
If you maneuver the steering wheel immediately after
starting the engine at less than about −30C (−22F)