check engine Lexus GS300 2006 Engine

SECTION 6 – 2
511
SERVICE PROCEDURES AND
SPECIFICATIONS
Engine
Specifications (GS430) 512. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications (GS300) 515. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel518 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel pump shut off system520 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Facts about engine oil consumption520 . . . . . . . . . . . . . . . . . . . . . . . .
Used engine oil522 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the engine oil level522 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the engine coolant level527 . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the radiator and condenser529 . . . . . . . . . . . . . . . . . . . . . . .
Spark plugs529 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ENGINE
514– COOLING SYSTEM
Capacity
10.1 L (10.7 qt., 8.9 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.
NOTE:
“Toyota Super Long Life Coolant” is used in your Lexus vehicle at factory fill. In order to avoid technical problems, only use ”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. Please contact your Lexus dealer for further details.
– IGNITION SYSTEM
Spark plug – Make DENSO
NGK
– Gap
SK20R11
IFR6A11
1.1 mm (0.043 in.)
– ELECTRICAL SYSTEM
Battery – Open voltage at 20
C (68
F):
– Charging rates
12.7V Fully charged
12.3V Half charged
11.9V Discharged
[Voltage that is checked 20 minutes after the engine switch is off with all
the lights turned off]
5A max.

ENGINE
517 – COOLING SYSTEM
Capacity
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.
NOTE:
“Toyota Super Long Life Coolant” is used in your Lexus vehicle at factory fill. In order to avoid technical problems, only use ”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. Please contact your Lexus dealer for further details.
– IGNITION SYSTEM
Spark plug – Make DENSO
NGK
– Gap
FK20HBR11
ILFR6D11T
1.1 mm (0.043 in.)
– ELECTRICAL SYSTEM
Battery – Open voltage at 20
C (68
F):
– Charging rates
12.7V Fully charged
12.3V Half charged
11.9V Discharged
[Voltage that is checked 20 minutes after the engine switch is off with all
the lights turned off]
5A max.

ENGINE
521 The amount of engine oil consumed depends on the
viscosity of the oil, the quality of the oil and the way the
vehicle is driven.
More oil is consumed under driving conditions such as high
speeds and frequent acceleration and deceleration.
A new engine consumes more oil, since its pistons, piston rings
and cylinder walls have not become conditioned.
Oil consumption: Max. 1.0 L per 1000 km (1.1 qt./600 miles,
0.9 lmp·qt./600 miles).
When judging the amount of oil consumption, keep in
mind that the oil may have become diluted, making it
difficult to judge the true level accurately.
For example, if a vehicle is used for repeated short trips and
consumes a normal amount of oil, the dipstick may not show
any drop in the oil level at all, even after 1000 km (600 miles)
or more. This is because the oil is gradually becoming diluted
with fuel or moisture, making it appear that the oil level has not
changed.
The diluting ingredients evaporate out when the vehicle is then
driven at high speeds, as on an expressway, making it appear
that oil is excessively consumed after driving at high speeds.
Importance of engine oil level check
One of the most important points in proper vehicle
maintenance is to keep the engine oil at the optimum level so
that oil function will not be impaired. Therefore, it is essential
that the oil level be checked regularly. Lexus recommends that
the oil level be checked every time you refuel the vehicle.
NOTICE
Failure to check the oil level regularly could lead to
serious engine trouble due to insufficient oil.
For detailed information on oil level check, see ”Checking the
engine oil level” on page 522.

ENGINE
522
USED ENGINE OIL
CAUTION
Used engine oil contains potentially harmful
contaminants which may cause skin disorders such
as inflammation or skin cancer, so care should be
taken to avoid prolonged and repeated contact with
it. To remove used engine oil from your skin, wash
thoroughly with soap and water.
Do not leave used oil within the reach of children.
Dispose of used oil and used oil filters only in a safe
and acceptable manner. Do not dispose of used oil
and used oil filters in household trash, in sewers or
onto the ground. Call your Lexus dealer or a service
station for information concerning recycling or
disposal.
CHECKING THE ENGINE OIL LEVEL
G62001
GS430
G62002
GS300
With the engine at operating temperature and turned off,
check the oil level on the dipstick.

ENGINE
524
G62006
GS300 (four−wheel drive models)
1
Add oil 2
O.K. 3
Too full
4. Pull the dipstick out and look at the oil level while holding a
rag under the end. If it is between the full level mark (
5
) and
the low level mark ( 4
), it is O.K.
NOTICE
Be careful not to drop engine oil on the vehicle
components.
G62003
GS430GS300
If the oil level is below or only slightly above the low level
mark, add engine oil of the same type as already in the
engine.
Remove the oil filler cap and add engine oil a little at a time,
checking the dipstick. We recommend that you use a funnel
when adding oil. The approximate quantity of oil needed to
raise the level between low and full on the dipstick is indicated
as follows:
1.5 L (1.6 qt., 1.3 lmp. qt.)
For the engine oil capacity, see “Specifications” on pages 512
and 515.
When the level reaches within the correct range, return the
filler cap and turn the cap clockwise until you hear a click.

ENGINE
525
NOTICE
Be careful not to spill engine oil on the vehicle
components.
Avoid overfilling, or the engine could be damaged.
Check the oil level on the dipstick once again after
adding the oil.
Engine oil selection
“Toyota Genuine Motor Oil” is used in your Lexus vehicle. Use
Lexus approved “Toyota Genuine Motor Oil” or equivalent to
satisfy the following grade and viscosity.
Oil grade: API grade SL “Energy−Conserving” or ILSAC
multigrade engine oil.
Recommended viscosity: 5W−30
62L042
Outside temperature
SAE 5W−30 is the best choice for good fuel economy, and
good starting in cold weather.
If SAE 5W−30 is not available, SAE10W−30 may be used.
However, it should be replaced with 5W−30 at the next oil
change.

ENGINE
527
CHECKING THE ENGINE COOLANT
LEVEL
G62007
GS430
1
Reservoir cap 2
“FULL” line 3
“LOW” line
G62008
GS300
1
Reservoir cap 2
“FULL” line 3
“LOW” lineLook at the see−through coolant reservoir when the
engine is cold. The coolant level is satisfactory if it is
between the”FULL” and ”LOW” lines on the reservoir. If
the level is low, add the coolant. (For the coolant type, see
“Coolant type selection” described below.)
The coolant level in the reservoir will vary with engine
temperature. However, if the level is on or below the ”LOW”
line, add coolant. Bring the level up to the ”FULL” line.
If the coolant level drops within a short time after replenishing,
there may be a leak in the system. Visually check the radiator,
hoses, engine coolant filler cap, radiator cap and drain cock
and water pump.
If you can find no leak, have your Lexus dealer test the cap
pressure and check for leaks in the cooling system.
CAUTION
To prevent burning yourself, do not remove the radiator
cap when the engine is hot.

ENGINE
529
CHECKING THE RADIATOR AND
CONDENSER
If either of the above parts are extremely dirty or you are not
sure of their condition, take your vehicle to your Lexus dealer.
CAUTION
To prevent burning yourself , be careful not to touch the
radiator or condenser when the engine is hot.
NOTICE
To prevent damage to the radiator and condenser, do
not perform the work by yourself.
SPARK PLUGS
62R031c
GS430
Your engine is fitted with iridium−tipped spark plugs.
NOTICE
Use only iridium−tipped spark plugs and do not adjust
gaps for your engine performance and smooth
drivability.