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

SWITCHES
67
Seat heater
G12030
To turn on the seat heater, turn the dial as shown. The
indicator light (yellow) comes on.
The engine switch must be selected in “IG−ON” mode.
The heating level will be increased as you turn the dial to the
higher number.
To disable this function, turn the dial to the “0” position. The
indicator light goes off. Keep the dial in this position when not
in use.
CAUTION
Occupants must use caution when operating the seat
heater because they may experience minor burns even
at low temperatures. Use extra caution for;
 Babies, small children, elderly persons, sick persons
or persons with physical disabilities
 Persons who have sensitive skin
 Persons who are exhausted
 Persons who have taken alcohol or drugs which
induce sleep (sleeping drug, cold remedy, etc.).
To prevent the seat from overheating, do not use the
seat heater with a blanket, cushion, or other insulating
objects which cover the seat.

SWITCHES
68
NOTICE
Do not put unevenly weighted objects on the seat and
do not stick sharp objects (needles, nails, etc.) into
the seat.
 When cleaning the seats, do not use organic
substances (paint thinner, benzine, alcohol,
gasoline, etc.). They may damage the seat
ventilation/heating system and seat surface.
 When cleaning the seats, fully wring out a towel to be
used. The wet seats may cause the seat
ventilation/heating system to malfunction.
 To prevent the battery from being discharged, turn
the switches off when the engine is not running.

SECTION 1 – 3
69
INSTRUMENTS AND CONTROLS
Gauges, meters and service reminder
indicators
Fuel gauge70
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . .
Engine coolant temperature gauge 70
. . . . . . . . . . . . . . . . . . . . . . . . . .
Tachometer 71
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . .
Odometer and trip meter 72
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Light sensitive optitron meter 73
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service reminder indicators and warning buzzers 74
. . . . . . . . . . . . . .
Multi−information display 84
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument panel light control 98
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

GAUGES, METERS AND SERVICE REMINDER INDICATORS
70
FUEL GAUGE
G13001
Low fuel level warning light
The gauge indicates the approximate quantity of fuel
remaining in the tank when the engine switch is selected
in “IGON” mode.
It is a good idea to keep the tank over 1/4 full.
If the fuel level approaches ”E” or the low fuel level warning light\
comes on, fill the fuel tank as soon as possible.
On inclines or curves, due to the movement of fuel in the tank,
the fuel gauge needle may fluctuate or the low fuel level
warning light may come on earlier than usual.
If the fuel tank is completely empty, the malfunction indicator
lamp comes on. Fill the fuel tank immediately.
The indicator lamp goes off after driving several times. If the
indicator lamp does not go off, contact your Lexus dealer as
soon as possible. See the inner back cover for fuel capacity and recommended
fuel selection.
ENGINE COOLANT
TEMPERATURE GAUGE
G13002
 Normal range
The gauge indicates the engine coolant temperature when
the engine switch is selected in “IGON” mode. The
engine operating temperature will vary with changes in
weather and engine load.
If the needle points to the red zone or higher, stop your vehicle
and allow the engine to cool.
Your vehicle may overheat during severe operating conditions,
such as:
 Driving up a long hill on a hot day.
 Reducing speed or stopping after high speed driving.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
71

Idling for a long period with the air conditioning on in
stop−and−go traffic.
NOTICE
Do not remove the thermostat in the engine cooling
system as this may cause the engine to overheat. The
thermostat is designed to control the flow of coolant
to keep the temperature of the engine within the
specified operating range.
 Do not continue driving with an overheated engine.
See ”If your vehicle overheats” on page 473.
TACHOMETER
G13003
The tachometer indicates engine speed in thousands of
rpm (revolutions per minute). Use it while driving to
prevent engine overrevving.
Driving with the engine running too fast causes excessive
engine wear and poor fuel economy. Remember, in most
cases the slower the engine speed, the greater the fuel
economy.
NOTICE
Do not let the indicator needle get into the red zone. This
may cause severe engine damage.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
72
ODOMETER AND TRIP METER
G13045
This meter displays the odometer and two trip meters. To
change the mode indication, use the “ODO TRIP” switch.
The “ODO TRIP” switch is located in the switch box.
G13004
Push the button to use the switch box and then push the
“ODO TRIP” switch. The odometer records the total distance the vehicle has
been driven. The twin trip meter records two different
distances independently.
For example, you can use one meter to calculate the fuel
economy and the other to measure the distance on each trip.
To change the trip meter indication from one trip to the
other, push the “ODO TRIP” change switch. To set the A
trip meter to
zero, display the A meter reading, then push
the “RESET” switch. The same applies for the B trip
meter.
The data of trip meters will be cancelled if the electrical power
source is disconnected.
After operation, be sure to close the switch box to its original
position.
CAUTION
To reduce the chance of injury in case of an accident or
a sudden stop, keep the switch box closed when not in
use while driving.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
73
LIGHT SENSITIVE OPTITRONMETER
Light sensitive optitron meter reduces unwanted glare of
the instrument cluster to provide a fine view for the driver.
The meter is originally set to “AUTONorm” mode, so the
reflection of the instrument cluster is adjusted
automatically by tinting the cluster glass depending on
the lighting condition of your surroundings.
There are “AUTO” and “MANUAL” modes. To change the
mode as you like, follow the procedure below.
The reflection control switch is located in the switch box.
G13044
Push the button to use the switch box. When you push the
“MODE” switch, the present setting appears on the
multiinformation display. Push the “MODE” switch once
and then again within 6
seconds. Each time you push the button, the mode changes
in the following order:
1. “AUTO−Norm” Recommended mode . . . .
2. “AUTO−Lo” The cluster glass is tinted with the . . . . . .
surroundings darker than in “AUTO −Norm” mode.
3. “AUTO−Hi” The cluster glass is tinted with the . . . . . . .
surroundings brighter than in “AUTO −Norm” mode.
4. “MANUAL−1” The cluster glass is adjusted in deep . . . . .
tints.
5. “MANUAL−2” The cluster glass is adjusted in neutral . . . . .
tints.
6. “MANUAL−3” The cluster glass is adjusted in light . . . . .
tints.
7. “MANUAL−4” The cluster glass is not tinted, . . . . .
however, if the surroundings are very bright, it is automatically
adjusted in light tints.
The setting display goes off automatically about 6 seconds
after the “MODE” switch is pushed. The mode shown last is
set.
The cluster glass may not be tinted in “MANUAL−1”,
“MANUAL−2” or “MANUAL− 3” mode in the night or cloudy dark
day.
When the ambient temperature in the vehicle interior is low, it
may take time for the cluster glass to be tinted.
After operation, be sure to close the switch box to its original
position.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
74
CAUTION
To reduce the chance of injury in case of an accident or
a sudden stop, keep the switch box closed when not in
use while driving.
G13106
The light sensitive optitron meter sensor is located under the
high mounted stoplight.
NOTICE
Do not apply window tint or a sticker on the rear
window. Otherwise the light sensitive optitron meter
may not operate properly.
 If snow, mud, frost or the like is attached to the rear
window just behind the sensor, remove it soon, or the
light sensitive optitron meter may not operate
properly.
SERVICE REMINDER INDICATORS AND WARNING BUZZERS
IF THIS INDICATOR OR
BUZZER COMES ON ...DO THIS.
(a)or
(Red indicator and buzzer)If parking brake is off,
stop immediately and
contact Lexus dealer.
(b)
(Yellow indicator)
Take vehicle to Lexus
dealer. If brake
system warning light
(red) is also on, stop
immediately and
contact Lexus dealer.
(c)
(Indicator and buzzer)
Fasten driver’s seat
belt.
(d)WG5Fasten front
passenger’s seat belt.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
75
IF THIS INDICATOR OR
BUZZER COMES ON ...
DO THIS.
(e)Take vehicle to Lexus
dealer immediately.
(f)Stop immediately and
contact Lexus dealer.
(g)orTake vehicle to Lexus
dealer.
(h)See multi− information
display.
(i)or
Take vehicle to Lexus
dealer.
If brake system
warning light (red) is
also on, stop
immediately and
contact Lexus dealer.
IF THIS INDICATOR OR BUZZER COMES ON ...DO THIS.
(j)Close all doors.
(k)WG10If flashing, take vehicle
to Lexus dealer.
(l)WG6
Adjust tire inflation
pressure.
If light remains on,
contact Lexus dealer.
(m)WG8Take vehicle to Lexus
dealer.
(n)WG7Take vehicle to Lexus
dealer.
(o)Low fuel level
warning lightFill up tank.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
76IF THIS INDICATOR OR
BUZZER COMES ON ...
DO THIS.
(p)Key reminder
buzzerTurn off the engine
switch.
(a) Brake System Warning Light (red) and Buzzer
This light comes on in the following cases when the engine
switch is selected in “IG −ON” mode.
 When the parking brake is applied ...
GS430—This light comes on fo r a few seconds when the
engine is started even after the parking brake is released.
GS300—This light comes on fo r a few seconds when the
engine switch is selected in “IG −ON” mode even after the
parking brake is released.
If you drive your vehicle without releasing the parking brake,
the buzzer sounds and the message “PARK BRAKE” appears
on the multi −information display.
 When the brake fluid level is low ...
CAUTION
It is dangerous to continue driving normally when the
brake fluid level is low.
Have your vehicle checked at your Lexus dealer in the
following case:
The light does not come on even if the parking brake is
applied when the engine is started.
 The light does not come on even if the engine is started with
the parking brake released.