transmission Lexus GS430 2006 Scheduled Maintenance Guide / LEXUS 2006 GS430/GS300 FROM JAN. 2006 PROD. (OM30786U) User Guide

SECTION 3 – 1
345
STARTING AND DRIVING
Starting and driving
Three−way catalytic converters346
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine exhaust caution 347
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating the engine switch 348
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Parking brake 358
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. . . . . .
Automatic transmission 359
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Electronic throttle control system 371
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Intuitive parking assist 372
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear view monitor system 395
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise control 398
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
Dynamic radar cruise control 401
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adaptive variable suspension system 424
. . . . . . . . . . . . . . . . . . . . . . .
Traction control system 424
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle stability control system 427
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hill −start assist control system 429
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variable gear ratio steering system 431
. . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle dynamics integrated management 432
. . . . . . . . . . . . . . . . . . .
Brake system 433
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. . . . . .
Brake pad wear limit indicators 438
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Electric power steering system 438
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire pressure warning system 440
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pre−collision system 449
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\

STARTING AND DRIVING
348
To allow proper operation of your vehicle’s
ventilation system, keep the inlet grilles in front of the
windshield clear of snow, leaves, or other
obstructions.
 If you smell exhaust fumes in the vehicle, open the
windows and close the trunk lid to ensure plenty of
fresh air enters the vehicle. If you can smell exhaust
fumes even though th ere are no other vehicles in the
surrounding area, have your vehicle checked by your
Lexus dealer. Continued inhalation of exhaust fumes
can lead to death by gas poisoning.OPERATING THE ENGINE SWITCH
G31030a
 1 Electronic key 2Engine switch
3Automatic transmission selector lever
4Brake pedal

STARTING AND DRIVING
351
“ACC” mode
G31033
This mode allows some accessories to be operable such
as the radio, even if the engine is not running. An amber
indicator light turns on at the engine switch.
To select the “ACC” mode from “OFF” mode, push the engine
switch once without depressing the brake pedal. The engine
immobilizer is disabled and the security indicator light goes
out. (For details, see “Engine immobilizer” on page 12.)
If you cycle once through all the modes (“OFF”, “ACC”,
“IG−ON”) with the driver’s door closed, the second time you
select the “ACC” mode, the above message will appear for a
few seconds.
If the vehicle is left in “ACC” mode for about an hour, the engine
switch is automatically off.
If the driver’s door is opened with the transmission in “P”, a
buzzer will remind you in “ACC” mode.
“IGON” mode
G31034
“IGON” mode has two conditions: all gauges, meters
and accessories on and the engine is not running, or
engine running.
To select the “IG
−ON” mode while the engine is not running:
 From “OFF” mode—push the engine switch twice without
depressing the brake pedal.
 From “ACC” mode—push the engine switch once without
depressing the brake pedal.
The engine switch indicator light will be illuminated amber if the
engine is not running, and will turn off when the engine is
running.

STARTING AND DRIVING
352If you push the engine switch while the brake pedal is
depressed with the transmission not in “P” or “N”, “IG
−ON”
mode is selected with the engine not running.
It is not a malfunction if the needles on all meters and gauges
move slightly when selected in “IG− ON” mode.
NOTICE
Do not leave the engine switch in “IGON” mode while
the engine is not running. The battery will be
discharged.
“OFF” mode
G31032
This mode turns the engine and all accessories off.
To select the “OFF” mode, be sure that the selector lever
is in “P” and then turn the engine switch to “OFF”.
To select the “OFF” mode from “IG− ON” mode:
 If the engine is not running, push the engine switch once
while the brake pedal is not depressed.
 If the engine is running, push the engine switch once
regardless of brake pedal position while the vehicle is
completely stopped.
To select the “OFF” mode from “ACC” mode, push the engine
switch twice while the brake pedal is not depressed.
The engine immobilizer is automatically set, the security
indicator light blinks and the engine switch indicator light is
turned off. (For details, see “Engine immobilizer” on page 12.)

STARTING AND DRIVING
356
Starting the engine
Normal starting procedure
G31035
When depressing the brake pedal while carrying an
electronic key, make sure the green engine switch
indicator light comes on. And then push the engine
switch to start the engine.
If you press the engine switch while the brake pedal is
depressed and the transmission is in “P” or “N”, the engine will
start even if initially in “OFF”, “ACC” or “IG −ON” mode.
If you start the engine in “OFF” mode, the engine immobilizer
is disabled, and the security indicator light goes off.
If you push the engine switch while the brake pedal is
depressed with the transmission not in “P” or “N”, “IG −ON”
mode will be selected with the engine not running. If the engine stalls ...
Simply restart it , using the correct procedure given in normal
starting.
If the engine will not start
See ”If your vehicle will not start” on page 468.
NOTICE

Do not race a cold engine.
 If the engine becomes difficult to start or stalls
frequently, have the engine checked immediately.

STARTING AND DRIVING
357
STARTING THE ENGINE WHEN THE ELECTRONIC KEY
BATTERY IS DISCHARGED
If the electronic key battery is discharged, the engine can
be started using the following procedure.
5. Unlock the door with the
mechanical key and bring the
electronic key into the vehicle.
G11038
6. While the brake pedal is depressed, hold the ornament side
of the electronic key about 10 mm (0.4 in.) over the engine
switch as shown.
7. Within 5 seconds of the chime sounding, push the engine
switch with the brake pedal depressed to start the engine.
When you push the engine switch with the brake pedal not
depressed at this time, the engine will not start, but it is possible
to select “ACC”, “IG− ON” and “OFF” mode.
If it is not possible to start the engine or change the mode using
this procedure, contact your Lexus dealer. In addition, we recommend that the electronic key battery be
changed as soon as possible.
Stopping the engine
G31036
If you press the engine switch while the selector lever is
in “P” and the engine is running, regardless of brake pedal
position, the engine will be turned off.
With the transmission not in “P”, the engine switch is selected
in “ACC” mode.
If, in an emergency, you must turn the engine off while the
vehicle is moving, press the engine switch for more than 3
seconds. At this time, “ACC” mode is selected.
Several hours after the engine is turned off, you may hear a
sound coming from underneath the luggage compartment for
several minutes. This is normal operation and does not
indicate a malfunction. (See page vi.)

STARTING AND DRIVING
359
The buzzer will remind you to release the parking brake when
the vehicle speed rises above 5 km/h (3mph) with the parking
brake is applied. At this time the master warning light blinks
and the message “PARK BRAKE” appears on the
multi−information display.
CAUTION
Before driving, make sure the parking brake is fully
released
and that the parking brake reminder light is off.
AUTOMATIC TRANSMISSION
Your automatic transmission has a shift lock system to
minimize the possibility of incorrect operation. This
means you can only shift out of “P” position when the
brake pedal is depressed with the engine switch in
“IGON” mode. ( )
G31021

STARTING AND DRIVING
360
The shift position or shift range position is displayed
on the instrument cluster.
P: Parking and engine starting
R: Reverse position
N: Neutral position
D: Normal driving position (Shifting into overdrive
possible)
S: “S” mode driving
+: Upshifting
–: Downshifting Correct use of the automatic transmission is explained in
the following parts.
(a) Normal driving
(b) Driving in “S” mode
(c) Using engine braking
(d) Backing up
(e) Parking
(f) Good driving practice
(g) If you cannot shift the selector lever

STARTING AND DRIVING
361
(a) Normal driving
G31022
 1“P” (Park) position 2“N” (Neutral) position
1. Start the engine as instructed in “Operating the engine
switch” on page 348.
The transmission must be in “P” or “N” position. The engine wi\
ll
not start in any drive position even if engine switch is pushed
while the brake pedal is depressed.
G31023
 1 Power position 2Normal position
3Snow 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 363.
For snow mode, see “Electronic Throttle Control System”
on page 371.

STARTING AND DRIVING
362
G31024
 1Brake 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. Shifting into the overdrive gear is possible when the
transmission is in any position of “D”, “6” (six range), “\
5” (fifth
range) of “S” position. However, while the engine coolant
temperature is low, the transmission will not shift into the
overdrive gear even in the above specified position. (See “(c)
Using engine braking” and “(f) Good driving practice” for
exceptions.)
CAUTION
Never put your foot on the accelerator pedal while
shifting.
5. 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”.