2006 Lexus GS430 engine coolant

GAS STATION INFORMATION
Fuel selection:
Premium unleaded gasoline with an Octane Rating of 91
(Research Octane Number 96) or higher required for
optimum engine performance. However, if such premium
type cannot be obtained, you may use unleaded gasoline
with an Octane Rating as low as 87 (Research Octane
Number 91).
 Fuel tank capacity:
71 L (18.7 gal., 15.6 lmp.gal.)
 Engine oil:
“Toyota Genuine Motor Oil” or equivalent
Oil grade: ILSAC multigrade engine oil.
Recommend oil viscosity − SAE 5W−30 if normal
temperatures are below 38 C (100F)
Oil capacity: L (qt., lmp.qt.)
Drain and refill with filter without filter GS430 5.1 (5.4, 4.5) 4.5 (4.8, 4.0)
GS300 (2WD) 6.3 (6.6, 5.5) 5.9 (6.2, 5.1)
GS300 (4WD) 6.4 (6.7, 5.6) 6.0 (6.3, 5.2)
See page 530 for detailed information.
 Engine coolant:
Capacity: GS430 − 10.1 L (10.7 qt., 8.9 lmp.qt.)
GS300 − 9.1 L (9.6 qt., 8.0 lmp.qt.) Coolant type −
”Toyota Super Long Life Coolant” or similar
high quality ethylene glycol based non −silicate, non −amine,
non−nitrite, and non −borate coolant with long −life hybrid
organic acid technology (Coolant with long −life hybrid
organic acid technology is a combination of low phosphates
and organic acids.)
Do not use plain water alone.
For checking the engine coolant, see page 534.
 Automatic transmission:
Fluid type − “Toyota Genuine ATF Type WS”
See page 540 or 544 for detailed information.
 Tire information:
See page 548 through 570 for detailed information.
 Tire inflation pressure:
Tire size: GS430 − 245/40R18 93Y or P245/40R18 93V
GS300 − 225/50R17 94W or P225/50R17 93V
Tire inflation pressure:
Front 230 kPa (2.3 kgf/cm
2 or bar, 33 psi)
Rear 230 kPa (2.3 kgf/cm2 or bar, 33 psi)
For sustained high speeds above 160 km/h (100 mph), in
countries where such speeds are permitted by law, add the
tire inflation pressure given below to the front tires and rear
tires, but never exceed the maximum cold tire inflation
pressure molded on the tire sidewall.
GS430 60 kPa (0.6 kgf/cm
2 or bar, 9 psi)
GS300 50 kPa (0.5 kgf/cm2 or bar, 7 psi)

For detailed information, refer to the description given in each Section\
.
PICTORIAL INDEX
viPage
1
Tachometer 71
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Headlight high beam indicator light 49
. . . . . . . . . . .
3 Turn signal indicator light 49
. . . . . . . . . . . . . . . . . . . .
4 Headlight indicator light 46
. . . . . . . . . . . . . . . . . . . . . .
5 Slip indicator light 425, 428, 429
. . . . . . . . . . . . . . . . . .
6 Fog light indicator light 50
. . . . . . . . . . . . . . . . . . . . . . .
7 Driver’s seat belt reminder light 77
. . . . . . . . . . . . . . .
8 SRS warning light 78
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Open door warning light 81
. . . . . . . . . . . . . . . . . . . . . .
10 Automatic transmission indicator lights 359 . . . . . .
11 Fuel gauge 70
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12 Fuel filler door indicator 132
. . . . . . . . . . . . . . . . . . . . .
13 Low fuel level warning light 82
. . . . . . . . . . . . . . . . . . .
14 Engine coolant temperature gauge 70
. . . . . . . . . . . .
15 Charging system warning light 79
. . . . . . . . . . . . . . . .
16 Brake system warning light (yellow) 77
. . . . . . . . . . . Page
17 Malfunction indicator lamp
79
. . . . . . . . . . . . . . . . . . .
18 Adaptive frontlighting system off
indicator light 48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19 Antilock brake system warning light 80
. . . . . . . . . .
20 Precollision system warning light 82
. . . . . . . . . . . .
21 Brake system warning light (red) 76
. . . . . . . . . . . . . .
22 Master warning light 80
. . . . . . . . . . . . . . . . . . . . . . . . .
23 Electric power steering system warning light 82 . .
24 Multiinformation display 84
. . . . . . . . . . . . . . . . . . . . .
25 Odometer and trip meter 72
. . . . . . . . . . . . . . . . . . . . .
26 Tire pressure warning light 81
. . . . . . . . . . . . . . . . . . .
27 Intuitive parking assist indicator light 373
. . . . . . . .
28 Snow mode indicator light 371
. . . . . . . . . . . . . . . . . . .
29 Cruise control indicator light 398
. . . . . . . . . . . . . . . .
30 Power mode indicator light 371
. . . . . . . . . . . . . . . . . .
31 Damping mode indicator light 424
. . . . . . . . . . . . . . . .

For detailed information, refer to the description given in each Section\
.
PICTORIAL INDEX
viiiPage
1
Tachometer 71
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Headlight high beam indicator light 49
. . . . . . . . . . .
3 Turn signal indicator light 49
. . . . . . . . . . . . . . . . . . . .
4 Tail light indicator light 46
. . . . . . . . . . . . . . . . . . . . . . .
5 Slip indicator light 425, 428, 429
. . . . . . . . . . . . . . . . . .
6 Fog light indicator light 50
. . . . . . . . . . . . . . . . . . . . . . .
7 Driver’s seat belt reminder light 77
. . . . . . . . . . . . . . .
8 SRS warning light 78
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Open door warning light 81
. . . . . . . . . . . . . . . . . . . . . .
10 Automatic transmission indicator lights 359 . . . . . .
11 Fuel gauge 70
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12 Fuel filler door indicator 132
. . . . . . . . . . . . . . . . . . . . .
13 Low fuel level warning light 82
. . . . . . . . . . . . . . . . . . .
14 Engine coolant temperature gauge 70
. . . . . . . . . . . .
15 Charging system warning light 79
. . . . . . . . . . . . . . . .
16 Brake system warning light (yellow) 77
. . . . . . . . . . . Page
17 Malfunction indicator lamp
79
. . . . . . . . . . . . . . . . . . .
18 Adaptive frontlighting system off
indicator light 48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19 Antilock brake system warning light 80
. . . . . . . . . .
20 Precollision system warning light 82
. . . . . . . . . . . .
21 Brake system warning light (red) 76
. . . . . . . . . . . . . .
22 Master warning light 80
. . . . . . . . . . . . . . . . . . . . . . . . .
23 Electric power steering system warning light 82 . .
24 Multiinformation display 84
. . . . . . . . . . . . . . . . . . . . .
25 Odometer and trip meter 72
. . . . . . . . . . . . . . . . . . . . .
26 Tire pressure warning light 81
. . . . . . . . . . . . . . . . . . .
27 Intuitive parking assist indicator light 373
. . . . . . . .
28 Snow mode indicator light 371
. . . . . . . . . . . . . . . . . . .
29 Cruise control indicator light 398
. . . . . . . . . . . . . . . .
30 Power mode indicator light 371
. . . . . . . . . . . . . . . . . .
31 Damping mode indicator light 424
. . . . . . . . . . . . . . . .

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.

AIR CONDITIONING
267
To prevent fogging up of the windshield, the air intake mode
may change automatically to the OUTSIDE AIR mode
depending on the condition of the air conditioning system.
For example, when the ambient temperature is low, the air
intake mode may change automatically to the OUTSIDE AIR
mode. This is not a malfunction.
When the air conditioning is on, if the engine coolant
temperature becomes extremely high, the RECIRCULATED
AIR mode is automatically selected. This is not a malfunction.
When
the engine coolant temperature is lowered, the previous
mode resumes.
Turning off the air conditioning manually will cancel the
EXHAUST GAS AUTOMATIC mode. If you select the “AUTO”
mode during fan operating, the air conditioning turns on and
the EXHAUST GAS AUTOMATIC mode will operate.
For normal use, it is best to keep the air intake control button
set to OUTSIDE AIR mode. If recirculated air is used during
heating, the windows will fog up more easily. To change the sensitivity of the sensor switching between
the RECIRCULATED AIR and OUTSIDE AIR in the
AUTOMATIC mode, push the air intake control button and
hold it for a few seconds. The display changes to the one
illustrated below.
The sensitivity of the sensor can be adjusted only while the
vehicle has been stopped.
G21023
The sensitivity of the switches is set to be higher toward “HI”
and lower toward “LO”.
Touch the desired switch on the screen.
When
you push any button except the air intake control button,
the above screen goes off.

AIR CONDITIONING
274
G21016
Side vents (driver’s side)
G21064
Side vents (front passenger’s side)
G21017
Rear vents
If air flow control is not satisfactory, check the center
vents, side vents and rear vents. They may be opened or
closed as shown.
When outside temperature is low like a winter season, air flow
temperature from the center vents, side vents and rear vents
may not be warmed up enough for a while until the engine
coolant temperature becomes high enough.
If air flow from the center vents, side vents and rear vents is not
satisfactory, air flow direction can be changed manually by
adjusting the vents fin direction or the vents may be closed.