2006 Lexus GS430 transmission

GAUGES, METERS AND SERVICE REMINDER INDICATORS
79
(f) Charging System Warning Light
This warning light comes on when the engine switch is
selected in “IG−ON” mode, and goes off when the engine is
started.
When there are problems in the charging system while the
engine is running, the warning light comes on.
NOTICE
When the charging system warning light comes on
while the engine is running, malfunctions such as the
engine drive belt being broken may have occurred. If
the warning light comes on, immediately stop the
vehicle in a safe place and contact your Lexus dealer.
(g) Malfunction Indicator Lamp
This lamp comes on when the engine switch is selected in
“IGON” mode and goes off after the engine starts. This
means that the warning light system is operating properly.
If the lamp remains on, or the lamp comes on while
driving, first check the followings:
 Empty fuel tank
If the fuel tank is empty, refuel immediately.
 Loose fuel tank cap
If the fuel tank cap is loose, securely tighten it.
These cases are temporary malfunctions. The malfunction
indicator lamp will go off after taking several driving trips.
If the lamp does not go off even after several trips, contact your
Lexus dealer as soon as possible.
If the fuel tank is not empty or the fuel tank cap is not
loose...
 There is a problem somewhere in the engine, emission
control system, electronic throttle control system, automatic
transmission electrical system or warning light system itself.
Contact your Lexus dealer as soon as possible to service the
vehicle.
If this lamp comes on and engine speed does not increase
when the accelerator pedal is depressed, there may be a
problem somewhere in the electronic throttle control system.

AUDIO
333
“
Page 2” switch: Use this switch to display the operation
switches on the second page.
“Page 1” switch: Use this switch to display the operation
switches on the top page.
“Hide Buttons” switch: Use this switch to turn off the
operation switches from the display.
If “
” appears on the display when you touch the switch, the
operation is not permitted. Description of each switch—
Switches on top page
“Select Number” switch: The track or number search screen
appears. (See “Searching by track” that follows.)
“Prev. Menu” switch: When you touch this switch while the
disc menu is displayed, the previous page appears on the
screen. If you touch this switch while the player is playing
video, the previous track is searched and played.
“Next Menu” switch: When you touch this switch while the
disc menu is displayed, the next page appears on the display.
If you touch this switch while the player is playing video, the
next track is searched and played.
“Main/Sub” switch: A multiplex transmission changing
switch. The mode changes from Main/Sub to Main, to Sub and
back to Main/Sub by touching this switch.

SECTION 3 – 1
345
STARTING AND DRIVING
Starting and driving
Three−way catalytic converters346
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine exhaust caution 347
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating the engine switch 348
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking brake 358
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
Automatic transmission 359
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic throttle control system 371
. . . . . . . . . . . . . . . . . . . . . . . . . . .
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
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
Brake pad wear limit indicators 438
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.)