2006 Lexus GS430 service indicator

HOW TO USE THIS MANUAL
vii
HOW TO USE THIS MANUAL
The contents of this manual are explained briefly on this
page to help you make the best use of the manual. Please
read this page and the rest of the Owner’s Manual
carefully to make sure you fully understand the operation
of your vehicle.
This will help you enjoy safe and comfortable driving.
TABLE OF CONTENTS
The table of contents and the pictorial index provide easy
reference to the appropriate pages.
BASIC OPERATION QUICK REFERENCE
Operation of basic equipment is briefly explained in an easily
understandable way for quick reference.
SECTION 1 INSTRUMENTS AND CONTROLS
The vehicle’s equipment is divided into the 8 groups listed
below. Use of the equipment is explained, including any points
you should pay particular attention to.
1. Keys and doors
2. Switches
3. Gauges, meters and service reminder indicators
4. Interior equipment
5. Exterior equipment
6. Occupant restraint systems
7. Steering wheel and mirrors
8. Touch screen
SECTION 2 AIR CONDITIONING AND AUDIO
The features of the vehicle’s air conditioning and audio are
explained in detail. Be sure to read this section so that you can
make full use of them.
SECTION 3 STARTING AND DRIVING
Starting the engine, driving, stopping, operation of features
affecting vehicle handling, hints on vehicle safety and safe
driving techniques are all explained. Please read everything
in this section, and remember − drive safely!
SECTION 4 IN CASE OF AN EMERGENCY
This section explains what to do in the event of an urgent
situation such as the engine not starting or getting a flat tire,
etc. If such a problem occu rs, check the contents of this
Owner’s Manual and follow the instructions given.
SECTION 5 MAINTENANCE
This section explains the importance of regular maintenance.
Regular and periodic inspection and maintenance of your
Lexus will help to keep your vehicle in its best condition.
SECTION 6 SERVICE PROCEDURES AND
SPECIFICATIONS
Simple maintenance procedure and service data are provided
here for your reference should you wish to perform inspection
and maintenance yourself.

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.