2004 Lexus GX470 fuel pressure

IMPORTANT INFORMATION ABOUT YOUR LEXUS
iv
Accessories, spare parts and modification of
your Lexus
A wide variety of non-genuine spare parts and accessories for
Lexus vehicles are currently available in the market. You
should know that Toyota does not warrant these products and
is not responsible for their performance, repair, or
replacement, or for any damage they may cause to, or adverse
effect they may have on, your Lexus vehicle.
This vehicle should not be modified with non-genuine Lexus
products. Modification with non- genuine Lexus products
could affect its performance, safety or durability, and may even
violate governmental regulations. In addition, damage or
performance problems resulting from the modification may not
be covered under warranty.
If you install any Genuine Accessories such as a bull-bar,
winch, etc., consult your Lexus dealer.
Installation of a mobile two-way radio system
As the installation of a mobile two-way radio system in your
vehicle could affect electronic systems such as the multiport
fuel injection system/sequential multiport fuel injection system,
cruise control system, anti-lock brake system, SRS airbag
system and seat belt pretensioner system, be sure to check
with your Lexus dealer for precautionary measures or special
instructions regarding installation.
Tires and loading on your Lexus
Underinflated or overinflated tire pressure and the
excess load may result in the deterioration of steering
ability and braking ability, leading to an accident.
Check the tire inflation pressure periodically and be
sure to keep the load limits given in this Owner's
Manual. For details about tire inflation pressure and
load limits, see pages 532 and 431.
Scrapping of your Lexus
The SRS airbag and seat belt pretensioner devices in your
Lexus contain explosive chemicals. If the vehicle is scrapped
with the airbags and seat belt pretensioners left as they are,
this may cause an accident such as a fire. Be sure to have the
systems of the SRS airbag and seat belt pretensioner removed
and disposed of by a qualified service shop or by your Lexus
dealer before you scrap your vehicle.

For detailed information, refer to the description given in each Section.
PICTORIAL INDEX
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Page
1Automatic transmission second start
indicator light 373. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2Unengaged Parkº warning light 61. . . . . . . . . . . . . . .
3Automatic transmission fluid temperature
warning light 62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4Low washer fluid warning light 65. . . . . . . . . . . . . . . . .
5Automatic transmission indicator lights 365. . . . . .
6Driver's seat belt reminder light 58. . . . . . . . . . . . . . . .
7Turn signal indicator light 31. . . . . . . . . . . . . . . . . . . . .
8Brake system warning light 57. . . . . . . . . . . . . . . . . . . .
9Headlight high beam indicator light 31. . . . . . . . . . . .
10ABSº warning light 60. . . . . . . . . . . . . . . . . . . . . . . . . .
11Open door warning light 61. . . . . . . . . . . . . . . . . . . . . . .
12Tachometer 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13Headlight indicator light 29. . . . . . . . . . . . . . . . . . . . . . .
14Cruise control indicator light 377. . . . . . . . . . . . . . . .
15Engine oil replacement reminder light 64. . . . . . . . . .
16Engine coolant temperature gauge 52. . . . . . . . . . . . . Page
17Discharge warning light 63. . . . . . . . . . . . . . . . . . . . . . .
18Low engine oil pressure warning light 64. . . . . . . . . .
19Malfunction indicator lamp 59. . . . . . . . . . . . . . . . . . . .
20Slip indicator light 389, 391, 394, 396. . . . . . . . . . . . .
21Vehicle stability control system off
indicator light 391. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22Center differential lock indicator light 373. . . . . . . .
23VSC TRACº warning light 63. . . . . . . . . . . . . . . . . . . . .
24Downhill assist control system
indicator light 393. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25Rear height control indicator lights 386. . . . . . . . . . .
26Security indicator light 14, 26. . . . . . . . . . . . . . . . . . . .
27SRS warning light 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28Trip meter reset knob 55. . . . . . . . . . . . . . . . . . . . . . . . .
29Odometer and trip meter 55. . . . . . . . . . . . . . . . . . . . . .
30Low fuel level warning light 65. . . . . . . . . . . . . . . . . . . .
31Fuel gauge 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

EXTERIOR EQUIPMENT
100
FUEL TANK CAP
This indicates that the fuel filler door is on the left side of
your vehicle.
1. To open the fuel filler door, pull the lever under the
instrument panel.
When refueling, turn off the engine.
CAUTION
Do not smoke, cause sparks or allow open flames
when refuelling. The fumes are flammable.
When opening the cap, do not remove the cap
quickly. In hot weather, fuel under pressure could
cause injury by spraying out of the filler neck if the
cap is suddenly removed.

EXTERIOR EQUIPMENT
101
2. To remove the fuel tank cap, turn the cap
counterclockwise by 90 degrees (to the pressure point
1), and then turn it an additional 30 degrees (to point2). Pause slightly before removing it.
It is not unusual to hear a slight swoosh when the cap is
opened.
15PY017
3. The removed cap can be stored on the back side of the
fuel filler door.
Position the cap so that the hooks point to the left and right or
up and down, and set it in the receptacle on the back side of
the door.

EXTERIOR EQUIPMENT
102When installing the cap, turn the cap clockwise until you
hear a click. When you hear the click, the cap is fully
closed.
CAUTION
Make sure the cap is installed securely to prevent fuel
spillage in the event of an accident.
Use only a genuine Lexus fuel tank cap for
replacement. It is designed to regulate fuel tank
pressure.
NOTICE
To prevent damage to the cap, apply force only in the
turning direction to the cap. Do not pull or pry it.

DRIVING TIPS
429 When restarting out after parking on a slope:
1. With the transmission in Pº position, start the engine. Be
sure to keep the brake pedal depressed.
2. Shift into the 3º, 2º, Lº or Rº position.
3. Release the parking brake and brake pedal and slowly pull
or back away from the wheel blocks. Stop and apply your
brakes.
4. Have someone retrieve the blocks.
CAUTION
Do not exceed 72 km/h (45 mph) or the posted towing
speed limit, whichever is lower. Because instability
(swaying) of a towing vehicle-trailer combination
usually increases as the speed increases, exceeding
72 km/h (45 mph) may cause loss of control.
Slow down and downshift before descending steep
or long downhill grades. Do not make sudden
downshifts.
Avoid holding the brake pedal down too long or too
frequently. This could cause the brakes to overheat
and result in reduced braking efficiency.
HOW TO SAVE FUEL AND MAKE
YOUR VEHICLE LAST LONGER
Improving fuel economy is easy Ð just take it easy. It will help
make your vehicle last longer, too. Here are some specific tips
on how to save money on both fuel and repairs:
Keep your tires inflated at the correct pressure. Check
the pressure every two weeks, or at least once a month.
Underinflation causes tire wear and wastes fuel.
Do not carry unneeded weight in your vehicle. Excess
weight puts a heavier load on the engine, causing greater
fuel consumption.
Avoid lengthy warm-up idling. Once the engine is
running smoothly, begin driving Ð but gently. Remember,
however, that on cold winter days this may take a little
longer.
Always keep the automatic transmission selector lever
in the Dº position when engine braking is not required.
Driving with the overdrive off will reduce the fuel economy.
(For details, see Automatic transmissionº on page 365.)
Accelerate slowly and smoothly. Avoid jackrabbit starts.
Avoid long engine idling. If you have a long wait and you
are not in traffic, it is better to turn off the engine and start
again later.
Avoid engine over-revving. Use a gear position suitable
for the road on which you are traveling.

MAINTENANCE
491 Brakes
At a safe place, check that the brakes do not pull to one side
when applied.
Parking brake
Check that the lever has the proper travel and that, on a safe
incline, your vehicle is held securely with only the parking brake
applied.
Automatic transmission Parkº mechanism
Check the lock release button of the selector lever for proper
and smooth operation. On a safe incline, check that your
vehicle is held securely with the selector lever in Pº position
and all brakes released.
Vehicle exterior
Items listed below should be performed from time to time,
unless otherwise specified.
Fluid leaks
Check underneath for leaking fuel, oil, water or other fluid after
the vehicle has been parked for a while. If you smell fuel fumes
or notice any leak, have the cause found and corrected
immediately.
Doors and engine hood
Check that all side doors and back door, operate smoothly and
all latches lock securely. Make sure the engine hood
secondary latch secures the hood when the primary latch is
released.
Tire inflation pressure
Check the pressure with a gauge every two weeks,
or at least once a month and adjust as shown on the
tire pressure label. See page 532 for additional
information.
Tire surface
Check the tires carefully for cuts, damage or
excessive wear. See page 545 for additional
information.
Wheel nuts
When checking the tires, make sure to check the nuts
for looseness. Tighten them if necessary.
Tire rotation
Rotate the tires according to the maintenance
schedule. (For scheduled maintenance information,
please refer to the Owner's Manual
Supplement/Scheduled Maintenanceº.) See page 544
for additional information.

ENGINE
513
FUEL PUMP SHUT OFF SYSTEM
The fuel pump shut off system stops supplying fuel to the
engine to minimize the risk of fuel leakage when the engine
stalls or an airbag inflates upon collision. To restart the engine
after the fuel pump shut off system activates, turn the ignition
switch to ACCº or LOCKº once and start it.
CAUTION
Inspect the ground under the vehicle before restarting
the engine. If you find that liquid has leaked onto the
ground, it is the fuel system that has been damaged and
it is in need of repair. In this case, do not restart the
engine.
FACTS ABOUT ENGINE OIL
CONSUMPTION
Functions of engine oil
Engine oil has the primary function of lubricating and cooling
the inside of the engine, and plays a major role in maintaining
the engine in proper working order.
Engine oil consumption
It is normal that an engine should consume some engine
oil during normal engine operation. The causes of oil
consumption in a normal engine are as follows.
Oil is used to lubricate pistons, piston rings and cylinders.
A thin film of oil is left on the cylinder wall when a piston
moves downwards in the cylinder. High negative pressure
generated when the vehicle is decelerating sucks some of
this oil into the combustion chamber. This oil as well as
some part of the oil film left on the cylinder wall is burned by
the high temperature combustion gases during the
combustion process.
Oil is also used to lubricate the stems of the intake valves.
Some of this oil is sucked into the combustion chamber
together with the intake air and is burned along with the fuel.
High temperature exhaust gases also burn the oil used to
lubricate the exhaust valve stems.