park assist Lexus GS430 2006 Scheduled Maintenance Guide / LEXUS 2006 GS430/GS300 FROM JAN. 2005 PROD. OWNER'S MANUAL (OM30649U)

For detailed information, refer to the description given in each Section\
.
PICTORIAL INDEX
xivPage
1
Tachometer 69
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Headlight high beam indicator light 47
. . . . . . . . . . .
3 Turn signal indicator light 47
. . . . . . . . . . . . . . . . . . . .
4 Headlight indicator light 44
. . . . . . . . . . . . . . . . . . . . . .
5 Slip indicator light 418, 420
. . . . . . . . . . . . . . . . . . . . . .
6 Fog light indicator light 48
. . . . . . . . . . . . . . . . . . . . . . .
7 Driver’s seat belt reminder light 75
. . . . . . . . . . . . . . .
8 SRS warning light 76
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Open door warning light 79
. . . . . . . . . . . . . . . . . . . . . .
10 Automatic transmission indicator lights 353 . . . . . .
11 Fuel gauge 68
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12 Fuel filler door indicator 128
. . . . . . . . . . . . . . . . . . . . .
13 Low fuel level warning light 80
. . . . . . . . . . . . . . . . . . .
14 Engine coolant temperature gauge 68
. . . . . . . . . . . .
15 Discharge warning light 77
. . . . . . . . . . . . . . . . . . . . . .
16 Brake system warning light (yellow) 75
. . . . . . . . . . . Page
17 Malfunction indicator lamp
77
. . . . . . . . . . . . . . . . . . .
18 Adaptive frontlighting system off
indicator light 46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19 Antilock brake system warning light 78
. . . . . . . . . .
20 Precollision system warning light 80
. . . . . . . . . . . .
21 Brake system warning light (red) 74
. . . . . . . . . . . . . .
22 Master warning light 78
. . . . . . . . . . . . . . . . . . . . . . . . .
23 Electric power steering system warning light 80 . .
24 Multiinformation display 82
. . . . . . . . . . . . . . . . . . . . .
25 Odometer and trip meter 70
. . . . . . . . . . . . . . . . . . . . .
26 Low tire pressure warning light 79
. . . . . . . . . . . . . . .
27 Intuitive parking assist indicator light 366
. . . . . . . .
28 Snow mode indicator light 364
. . . . . . . . . . . . . . . . . . .
29 Cruise control indicator light 392
. . . . . . . . . . . . . . . .
30 Power mode indicator light 364
. . . . . . . . . . . . . . . . . .
31 Damping mode indicator light 417
. . . . . . . . . . . . . . . .

For detailed information, refer to the description given in each Section\
.
PICTORIAL INDEX
xviPage
1
Tachometer 69
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Headlight high beam indicator light 47
. . . . . . . . . . .
3 Turn signal indicator light 47
. . . . . . . . . . . . . . . . . . . .
4 Tail light indicator light 44
. . . . . . . . . . . . . . . . . . . . . . .
5 Slip indicator light 418, 420
. . . . . . . . . . . . . . . . . . . . . .
6 Fog light indicator light 48
. . . . . . . . . . . . . . . . . . . . . . .
7 Driver’s seat belt reminder light 75
. . . . . . . . . . . . . . .
8 SRS warning light 76
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Open door warning light 79
. . . . . . . . . . . . . . . . . . . . . .
10 Automatic transmission indicator lights 353 . . . . . .
11 Fuel gauge 68
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12 Fuel filler door indicator 128
. . . . . . . . . . . . . . . . . . . . .
13 Low fuel level warning light 80
. . . . . . . . . . . . . . . . . . .
14 Engine coolant temperature gauge 68
. . . . . . . . . . . .
15 Discharge warning light 77
. . . . . . . . . . . . . . . . . . . . . .
16 Brake system warning light (yellow) 75
. . . . . . . . . . . Page
17 Malfunction indicator lamp
77
. . . . . . . . . . . . . . . . . . .
18 Adaptive frontlighting system off
indicator light 46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19 Antilock brake system warning light 78
. . . . . . . . . .
20 Precollision system warning light 80
. . . . . . . . . . . .
21 Brake system warning light (red) 74
. . . . . . . . . . . . . .
22 Master warning light 78
. . . . . . . . . . . . . . . . . . . . . . . . .
23 Electric power steering system warning light 80 . .
24 Multiinformation display 82
. . . . . . . . . . . . . . . . . . . . .
25 Odometer and trip meter 70
. . . . . . . . . . . . . . . . . . . . .
26 Low tire pressure warning light 79
. . . . . . . . . . . . . . .
27 Intuitive parking assist indicator light 366
. . . . . . . .
28 Snow mode indicator light 364
. . . . . . . . . . . . . . . . . . .
29 Cruise control indicator light 392
. . . . . . . . . . . . . . . .
30 Power mode indicator light 364
. . . . . . . . . . . . . . . . . .
31 Damping mode indicator light 417
. . . . . . . . . . . . . . . .

G00096
PICTORIAL INDEX
xix
SWITCH BOX
Page
1 Headlight cleaner switch 55 . . . . . . . .
2 Rear view mirror
folding switch 207
. . . . . . . . . . . . . . . . .
3 Rear electric
sunshade switch 120
. . . . . . . . . . . . . .
4 Intuitive parking assist switch 365 .
5 Adaptive Front Lighting system
cancel switch 46
. . . . . . . . . . . . . . . . . .
6 “ODO TRIP” and
“RESET” switches 70
. . . . . . . . . . . . . .
7 Instrument panel light control
switches 96
. . . . . . . . . . . . . . . . . . . . . . .
8 Light sensitive optitron meter
mode change switch 71
. . . . . . . . . . . .
9 Trunk lid opener 125
. . . . . . . . . . . . . . .
10 Fuel filler door opener 128
. . . . . . . . .
11 Power rear view mirror control
switches 206 . . . . . . . . . . . . . . . . . . . . . .
For detailed information, refer to the
description given in each Section.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
75
A warning light turning on briefly during operation does not
indicate a problem.
CAUTION
If either of the following conditions occurs, immediately
stop your
vehicle at a safe place and contact your Lexus
dealer.
 The light does not turn off even after the parking
brake is released while the engine is running.
In this case, the brakes may not work properly and
your stopping distance will become longer. Depress
the brake pedal firmly and bring the vehicle to an
immediate stop.
 The brake system warning light remains on together
with the “ABS” warning light.
In this case, not only the antilock brake system will
fail but also the vehicle will become extremely
unstable during braking.
GS430 only—Any of the following conditions may occur,
but do not indicate the malfunction:
The light may stay on for about 60 seconds after the engine
is started. It is normal if it turns off after a while.
 Depressing the brake pedal repeatedly may turn on the
warning light and buzzer. It is normal if the light turns off and
the buzzer stops sounding after a few seconds. 
You may hear a small sound in the engine compartment
after the engine is started or the brake pedal is depressed
repeatedly. This is a pump pulsating sound of the brake
system, and it is not a malfunction.
(b) Brake System Warning Light (yellow)
The light comes on when the engine switch is selected in
“IG−ON” mode.
GS430—If the engine is started, and the traction control
system, vehicle stability control system and hill −start assist
control system work properly, the light turns off after a few
seconds. Thereafter, if any part of the system malfunctions,
the light comes on again.
GS300—If the engine switch is selected in “IG −ON” mode, and
the traction control system, vehicle stability control system and
hill −start assist control system work properly, the light turns off
after a few seconds. Thereafter, if any part of the system
malfunctions, the light comes on again.
Although it is no problem to continue driving, have your vehicle
checked by your Lexus dealer as soon as possible.
(c) Driver’s Seat Belt Reminder Light and Buzzer
The light and buzzer act as a reminder to have the driver buckle
up the seat belt.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
84
(b) Graphic information
The following graphic information is shown on the
display.
Lexus park assist system display (if equipped)
 Dynamic radar cruise control display (if equipped)
See page 365 for Lexus park assist system and page 395 for
dynamic radar cruise control.
If you push the Lexus park assist system switch or turn the
engine switch on with the main switch of the Lexus park assist
system on, the Lexus park assist system screen appears for
2 seconds and then the multi −information display returns to the
previous screen.
When you push the main switch of the dynamic radar cruise
control, the dynamic radar cruise control screen appears.
When you push the “DISP” switch with the radar cruise control
screen on the display, the screen changes to cruise
information display.
(c) Warning messages
The following warning messages are shown on the
multiinformation display.
 Open Door Warning
G13041

G13006
G13042

G13043
Hood Open Warning
G13008

GAUGES, METERS AND SERVICE REMINDER INDICATORS
92
G13017
If the steering lock is malfunctioning, the master warning
light comes on, the engine switch indicator light blinks
amber and the above message appears.
The engine will not start in this case. Contact your Lexus
dealer as soon as possible.
G13018
If the steering lock is not unlocked due to the load applied
to the steering wheel when pushing the engine switch, the
master warning light comes on, the engine switch
indicator light blinks green and the above message
appears.
The engine will not start in this case. To start the engine, push
the engine switch again while turning the steering wheel in
either direction.
Lexus Park Assist System Warning
G13077
If icicles, snowflakes or mud gets on the ultrasonic
sensors of the Lexus park assist system when the system
is on, the above message appears and the vehicle symbol
and indicator bars continue flashing until the suspected
sensor is cleaned.
Remove the foreign matter or deice the sensor, the system
returns to normal.
G13076
If the ultrasonic sensor of the Lexus park assist system is
malfunctioning or a sensor cable is broken when the
system is on, the malfunctioning sensor flashes, 2 beeps
sound 5 times and the above message appears.
The flashing sensor is disabled, but other sensors work
properly. Have your vehicle checked by your Lexus dealer as
soon as possible.

TOUCH SCREEN
218
INFORMATION MENU
G18044
Vehicles with Navigation system*
G18045
Vehicles without Navigation system
*For other functions such as Maintenance and Calender, see
“Navigation System Owner’s Manual”. For “Lexus park Assist”, see “Setting the park assist system”\
on page 385. For “Adjust clock”, see “Clock” on page 103.
Trip information
Trip information such as driving time, driving distance,
average vehicle speed, fuel consumption, etc. can be
displayed on the screen.
1. Push the
“INFO” button to display the Information
Menu screen.
G18045
2. Touch the “Trip Info.” switch.

SECTION 3 – 1
339
STARTING AND DRIVING
Starting and driving
Three−way catalytic converters340
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine exhaust caution 341
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating the engine switch 342
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking brake 352
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
Automatic transmission 353
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic throttle control system 364
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Intuitive parking assist 365
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear view monitor system 388
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise control 392
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
Dynamic radar cruise control 395
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adaptive variable suspension system 417
. . . . . . . . . . . . . . . . . . . . . . .
Traction control system 418
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle stability control system 420
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hill −start assist control system 422
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variable gear ratio steering system 424
. . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle dynamics integrated management 426
. . . . . . . . . . . . . . . . . . .
Brake system 427
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
Brake pad wear limit indicators 431
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electric power steering system 432
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire pressure warning system 433
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pre−collision system 443
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\

STARTING AND DRIVING
365
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.
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 engine switch off in the snow mode, the
electronic throttle control system automatically changes to the
normal mode.
INTUITIVE PARKING ASSIST
G31049
The intuitive parking assist is a warning system used
when parking the vehicle at low speed (e.g. into a garage).
It uses an ultrasonic sensor, which checks the
approximate distance to an obstacle. It will inform you of
the approximate distance to an obstacle by displaying
information on the multiinformation display and the
screen, and with beeping sounds.

STARTING AND DRIVING
366
1Dual sensors
There are four of these steering guidance sensors installed in
the front bumper.
Steering guidance means that when an obstacle is inspected,
not only is the distance estimated, this function judges whether
collision with the obstacle within detection range is avoidable
if the vehicle is steered in a certain direction, and informs the
driver. There will be no warning if it judges that there is no
possibility of collision with the obstacle within detection range.
(See page 369.)
2 Rear corner sensors
There is one of these installed on each corner of the rear
bumper, they inspect obstacles and will sound a warning
depending on the distance to the obstacle. (See page 373.)
3 Back sensors
There are two of these installed near the center of the rear
bumper, they inspect obstacles and will sound a warning
depending on the distance to the obstacle. (See page 374.)
G31050
To use the intuitive parking assist, push the main switch
in the switch box with the engine switch in “IGON” mode.
Pushing the main switch again will turn the intuitive
parking assist off.
When you push the main switch, the indicator light in the
instrument cluster comes on and a beep sounds for one
second, indicating that the intuitive parking assist is turned on.
The intuitive parking assist will remain on even after turning the
engine switch to “OFF” and then to “IG−ON” mode with the
main switch on. However, a beep does not sound at this time.
If an error is detected in the intuitive parking assist while
self−checking, beeps sound and a warning appears in the
multi−information display and on the screen. For details, see
“Intuitive parking assist failure warning” on page 378.