2004 Lexus GX470 check engine

ENGINE
548If 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 radiator
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.
Coolant type selection
Use of improper coolants may damage your engine cooling
system.
Only use Toyota Super Long Life Coolantº or similar high
quality ethylene glycol based non- silicate, non- amine,
non- nitrite, and non- borate coolant with long- life hybrid
organic acid t echnology. (Coolant with long-life hybrid organic
acid technology is a combination of low phosphates and
organic acids.)
Toyota Super Long Life Coolantº is a mixture of 50% coolant
and 50% deionized water. This coolant provides protection
down to about -35C (-31F).

ENGINE
549
NOTICE
Do not use plain water alone.
Lexus recommends Toyota Super Long Life Coolantº, which
has been tested to ensure that it will not cause corrosion nor
result in malfunction of your engine coolant system with proper
usage. Toyota Super Long Life Coolantº is formulated with
long- life hybrid organic acid technology and has been
specifically designed to avoid engine cooling system
malfunction on Lexus vehicles.
Please contact your Lexus dealer for further details.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 a 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.

CHASSIS
557
CHECKING POWER STEERINGFLUID
The power steering fluid reservoir is located under the
right side engine compartment cover. Before checking
the power steering fluid, remove the cover. (For details,
see Removing the engine compart coversº on page 526.)
Check the fluid level, simply look at the see-through
reservoir. If necessary, add automatic transmission fluid
DEXRON
II or III .
If the vehicle has been driven around 80 km/h (50 mph) for 20
minutes (a little more in frigid temperatures), the fluid is hot
(60 C - 80 C or 140F - 175F). You may also check the level
when the fluid is cold (about room temperature, 10 C - 30C
or 50F - 85F) if the engine has not been run for about five
hours.

1If cold O.K.2If cold add3If hot O.K.
4If hot add
Clean all dirt off the reservoir and look at the fluid level. If the
fluid is cold, the level should be in the COLDº range. Similarly,
if it is hot, the fluid level should be in the HOTº range. If the
level is at the low side of the appropriate range, add automatic
transmission fluid DEXRON
II or III to bring the level within
the range.
To remove the reservoir cap, turn it counterclockwise and lift
up. To reinstall it, turn it clockwise. After replacing the reservoir
cap, visually check the steering box case, vane pump and hose
connections for leaks or damage.

ELECTRICAL COMPONENTS
595
NOTICE
Make sure the engine and all accessories are turnedoff before performing maintenance.
When checking the battery, remove the ground cable
first and reinstall it last.
Be careful not to cause a short circuit with tools.
Take care no solution gets into the battery when washing it.
If the battery is disconnected or run down
The power windows and moon roof may not operate
automatically and the jam protection function will not function
correctly after you reconnect, replace or recharge the battery.
In any of these cases, you should normalize the power
windows and moon roof. To normalize the power windows and
moon roof, see pages 50 and 107.
Checking battery condition
Check the battery condition by the indicator color.
1BLUE Ð Good condition.
2WHITE Ð Charging necessary. Have the battery
checked by your Lexus dealer.
3RED Ð Have the battery checked by your Lexus dealer.

ELECTRICAL COMPONENTS
598
CHECKING AND REPLACING THEBLADE TYPE FUSES
The engine compartment fuse box is located under the left
side engine compartment cover. Before checking the
engine compartment fuses, remove the cover. (For
details, see Removing the engine compartment coversº
on page 526.)

Engine compartment 1 Pull-out tool 2 Spare fuses

Driver's side instrument panel
1. Turn the ignition switch off and open the fuse box lid.
Determine which fuse may be causing the problem. The lid of
the fuse box shows the name of the circuit for each fuse.

ELECTRICAL COMPONENTS
600It is a good idea to purchase a set of spare fuses and keep them
in your vehicle for emergencies.
If the new fuse immediately blows out, there is a problem with
the electrical system. Have your Lexus dealer correct it as
soon as possible.
CAUTION
Never use a fuse with a higher amperage rating, or any
other object, in place of a fuse. This may cause
extensive damage and possibly a fire.
CHECKING THE CARTRIDGE TYPE
FUSES
The engine compartment fuse box is located under the left
side engine compartment cover. Before checking the
engine compartment fuses, remove the cover. (For
details, see Removing the engine compartment coversº
on page 526.)

Engine compartment

BODY
612Fuel
filler door: Do not apply water (high-pressure car wash,
for example) at or near the fuel tank inlet with the fuel filler door
opened. If the water enters the air vent, you may experience
trouble with refueling or rough engine idling.
Plastic wheel ornaments: The plastic wheel ornaments are
damaged easily by organic substances. If any organic
substance splashes an ornament, be sure to wash it off with
water and check if the ornament is damaged.
CAUTION
Do not attach the heavily damaged plastic wheel
ornament. It may fly off the wheel and cause accidents
while the vehicle is moving.
Aluminum wheels: Use only a mild soap or neutral detergent.
Urethane bumpers and side moldings: Wash carefully. Do
not scrub with abrasive cleaners. The bumper and side
molding faces are soft.
Road tar: Remove with turpentine or cleaners that are marked
safe for painted surfaces.
NOTICE
Do not use organic substances (gasoline, kerosene,
benzine or strong solvents), which may be toxic orcause damage.

GAS STATION INFORMATION

Fuel selection:
Select Octane Rating 87 (Research Octane Number 91) or
higher. For improved vehicle performance, the use of
premium unleaded gasoline with an Octane Rating of 91
(Research Octane Number 96) or higher is recommended.

Fuel tank capacity:
87 L (23 gal., 19.1 lmp. gal.)

Engine oil:
Toyota Genuine Motor Oilº or equivalent
Oil grade: API grade SL Energy- Conservingº or ILSAC multigrade engine oil.
Recommended oil viscosity: SAE 5W-30
Oil capacity:
Drain and refill with filter 6.2 L (6.5 qt., 5.5 lmp. qt.)
without filter 5.7 L (6.0 qt., 5.0 lmp. qt.)
See page 542 for detailed information.

Engine coolant:
Capacity: 12.9 L (13.6 qt., 11.4 lmp. qt.)
Coolant type Ð Toyota Super Long Life Coolantº 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 547.

Automatic transmission:
Fluid type Ð Toyota Genuine ATF WSº
See page 553 for detailed information.

Tire information:
See pages 559 through 582 for detailed information.

Tire inflation pressure:
Tire size: P265/65R17 110S
Tire inflation pressure: 220kPa (2.2 kgf/cm
2 or bar, 32 psi)