light Lexus GX470 2006 Gauges, Meters and Service Reminder Indicators / LEXUS 2006 GX470 OWNER'S MANUAL (OM60B99U)

MAINTENANCE
486Battery
Check the battery condition by the indicator color. See page
551 for additional information.
Brake fluid level
Make sure the brake fluid level is correct. See page 521 for
additional information.
Engine oil level
Check the level on the dipstick with the engine turned off and
the vehicle parked on a level spot. See page 511 for
additional
information.
Power steering fluid level
Check the level through the reservoir. The level should be in
the “HOT” or “COLD” range depending on the fluid
temperature. See page 522 for additional information.
Exhaust system
If you notice any change in the sound of the exhaust or smell
exhaust fumes, have the cause located and corrected
immediately. (See “Engine exhaust caution” on page 343.)
Vehicle interior
Items listed below should be checked regularly, e.g. while
performing periodic services, cleaning the vehicle, etc.
Lights
Make sure the headlights, stop lights, tail lights, turn signal
lights, and other lights are working. Check headlight aim. Service reminder indicators and warning buzzers
Check
that all service reminder indicators and warning buzzers
function properly.
Steering wheel
Check that it has the specified free play. Be alert for changes
in steering condition, such as hard steering, excessive free
play or strange noise.
Seats
Check that all front seat controls such as seat adjusters,
seatback recliner, etc. operate smoothly. Check that the head
restraints move up and down smoothly and that the locks hold
securely in any latched position. For folding −up second and
third seats, and detachable third seat, check that the latches
lock securely.
Seat belts
Check that the seat belt system such as buckles, retractors
and anchors operate properly and smoothly. Make sure the
belt webbing is not cut, frayed, worn or damaged.
Accelerator pedal
Check the pedal for smooth operation and uneven pedal ef fort
or catching.
Brake pedal
Check the pedal for smooth operation and the proper
clearance and free play. Check the brake booster function.

ENGINE
505
— IGNITION SYSTEM
Spark plug — Make DENSO
NGK
— Gap
SK20R11
IFR6A11
1.1 mm (0.043 in.)
— ELECTRICAL SYSTEM
Battery Open voltage at 20C (68F):
Charging rates
12.6 — 12.8 V Fully charged
12.2 — 12.4 V Half charged
11.8 — 12.0 V Discharged
[Voltage that is checked 20 minutes after the key is removed
with all the lights turned off]
5 A max.

ENGINE
506
FUEL
Fuel type
Your vehicle must use only unleaded gasoline.
To help prevent gas station mixups, your Lexus has a smaller
fuel tank opening. The special nozzle on pumps with unleaded
fuel will fit it, but the larger standard nozzle on pumps with
leaded gas will not.
At a minimum, the gasoline you use should meet the
specifications of ASTM D4814 in the U.S.A. and CGSB
3.5−M93 in Canada.
NOTICE
Do not use leaded gasoline. Use of leaded gasoline will
cause the threeway catalytic converter to lose its
effectiveness and the emission control system to
function improperly. Also, this can increase
maintenance costs.
Octane rating
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).
Use of unleaded fuel with an octane number or rating lower
than stated above will cause persistent heavy knocking. If
severe, this will lead to engine damage.
If your engine knocks...
If you detect heavy knocking even when using the
recommended fuel, or if you hear steady knocking while
holding a steady speed on level roads, consult your Lexus
dealer.
However, occasionally, you may notice light knocking for a
short time while accelerating or driving up hills. This is normal
and there is no need for concern.
Gasoline containing detergent additives
Lexus recommends the use of gasoline that contains
detergent additives to avoid buildup of engine deposits.
However, all gasoline sold in the U.S. contains detergent
additives to keep clean and/or clean intake systems.

ENGINE
512
If the oil level is below or only slightly above the low line,
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 line and full line on the dipstick is
indicated as follows:1.5 L (1.6 qt., 1.3 Imp. qt.)
For the engine oil capacity, see “Specifications” on page 518.
When the level reaches within the correct range, return the filler
cap and turn the cap clockwise until you hear a click.
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.

CHASSIS
521
CHECKING BRAKE FLUID
To check the fluid level, simply look at the seethrough
reservoir. The level should be between the “MAX” and
“MIN” lines on the tank.
It is normal for the brake fluid level to go down slightly as the
brake pads wear or when the fluid level in the accumulator is
high.
If the reservoir needs frequent refilling, it may indicate a serious
mechanical problem.
If the level is low, add FMVSS No.116 DOT 3 or SAE J1703
brake fluid to the brake reservoir. Refilling brake fluid:
1. Turn the ignition switch off.
2. Depress
the brake pedal more than 20 times (until the brake
pedal resistance decreases and pedal travel increases).
3. Remove the reservoir cap by hand. Add brake fluid up to the
“MAX” line.
If you do not follow the procedure above, the reservoir may
overflow.
Use only newly opened brake fluid. Once opened, brake fluid
absorbs moisture from the air, and excess moisture can cause
a dangerous loss of braking efficiency.
CAUTION
Take care when filling the reservoir because brake fluid
can harm your hands or eyes. If fluid gets on your hands
or in your eyes, flush the affected area with clean water
immediately. If you still feel uncomfortable with your
hands or eyes, go to the doctor.
NOTICE
If you spill some of the fluid, be sure to wipe it off to
prevent it from damaging the parts or paintwork.

CHASSIS
543
REPLACING WHEELS
When to replace your wheels
If you have wheel damage such as bending, cracks or
heavy corrosion, the wheel should be replaced.
If you fail to replace a damaged wheel, the tire may slip off the
wheel or cause loss of handling control.
Replacement with used wheels is not recommended as they
may have been subjected to rough treatment or high mileage
and could fail without warning. Also, bent wheels which have
been straightened may have hidden structural damage and
therefore should not be used. Never use an inner tube in a
leaking wheel which is designed for a tubeless tire.
Wheel selection
When replacing wheels, care should be taken to ensure
that they are equivalent to those removed in load capacity,
diameter, rim width, and offset.
Correct replacement wheels are available at your Lexus
dealer.
A wheel of a different size or type may adversely affect
handling, wheel and bearing life, brake cooling,
speedometer/odometer calibration, stopping ability, headlight
aim, bumper height, vehicle ground clearance, and tire or snow
chain clearance to the body and chassis.
CAUTION
Observe the following instructions. Otherwise, an
accident may occur resulting in death or serious
injuries.
 Do not use wheels other than the manufacturer’s
recommended size, as this may cause dangerous
handling characteristics resulting in loss of control.
 Do not use wheels of different brands, sizes and
types, as this may cause dangerous handling
characteristics resulting in loss of control.

SECTION 6 – 4
545
SERVICE PROCEDURES AND
SPECIFICATIONS
Electrical components
Specifications546
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
Checking battery condition 551
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery recharging precautions 554
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking and replacing the blade type fuses 554
. . . . . . . . . . . . . . . .
Checking the cartridge type fuses 557
. . . . . . . . . . . . . . . . . . . . . . . . . .
Adding washer fluid 558
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
.
Replacing light bulbs 559
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\

ELECTRICAL COMPONENTS
547
Driver’s side instrument panel
No.FUSEAMPERECIRCUIT
1SPARE10Spare fuse
2ALT140
Charging system and all
components in “AM1”,
“HEATER”, “CDS FAN”, “FR
FOG”, “DEFOG”, “AIR SUS”,
“AC INV”, “SEAT HEATER”,
“OBD”, “STOP”, “J/B”, “RR AC”,
“MIR HEATER”, “BATT CHG”,
“TOWING BRK” and “TOWING”
fuses
3SPARE15Spare fuse
4HEATER50Air conditioning system
5AIR
SUS50Rear height control air
suspension
6AM150
All components in “ACC”, “CIG”,
“IG1”, “FR WIP −WSH”, “RR
WIP”, “RR WSH”, “DIFF”,
“ECU− IG”, “TEMS” and “STA”
fuses
7TOWING
BRK30Trailer brake controller
8J/B50
All components in “P FR P/W”,
“P RR P/W”, “D RR P/W”, “D
P/SEAT”, “P P/SEAT”, “TAIL”,
“PANEL” and “POWER OR
TI&TE” fuses
9BATTCHG30Trailer sub battery
10TOWING40Trailer lights

ELECTRICAL COMPONENTS
548
No.FUSEAMPERECIRCUIT
11CDS FAN20Electric cooling fan
12RR A/C30Rear air conditioning system
13MIR
HEATER10Outside rear view mirror
defogger
14STOP10
Stop lights, high m ounted
stoplight, shift lock control
system, vehicle stability control
system, electronic m odulated
suspension, rear height control
air suspension, multiport fuel
injection system/sequential
multiport fuel injection system
15AC INV15Power outlet (115 VAC)
16FR FOG15Front fog lights
17OBD7.5On −board diagnosis system
18HEAD
(LO RH)10Right− hand headlight (low beam)
19HEAD
(LO LH)10Left− hand headlight (low beam)
No.FUSEAMPERECIRCUIT
20HEAD
(HI RH)10Right− hand headlight (high
beam)
21HEAD
(HI LH)10Left− hand headlight (high beam)
22EFI NO.210Multiport fuel injection
system/sequential multiport fuel
injection system
23HEATER
NO.27.5Air conditioning system
24DEFOG30Rear window defogger
25AIRSUSNO.210Rear height control air
suspension
26SEAT
HEATER20Seat heaters
27DOME10
Ignition switch light, interior
lights, personal lights, foot
lights, running board lights,
door courtesy lights, inside
door handle lights,
multi −information display
28RADIO
NO.120Audio system, navigation
system

ELECTRICAL COMPONENTS
549
No.FUSEAMPERECIRCUIT
29ECUB10
Multiplex communication
system, vehicle stability control
system, wireless remote
control system, inside rear
view mirror, air conditioning
system, electronic modulated
suspension, driving position
memory system, power
windows, moon roof, rear view
monitor system
30ECUBNO.210Theft deterrent system
31ABS
MTR40
Anti −lock brake system,
vehicle stability control system,
active traction control system,
brake assist system
32AM230Starting system, all components
in “IGN”, “SRS”, “GAUGE” and
“ST2” fuses
33ABS
SOL30
Anti −lock brake system,
vehicle stability control system,
active traction control system,
brake assist system
No.FUSEAMPERECIRCUIT
34ALTS7.5Charging system
35MAYDAY7.5Lexus Link System
36HORN10Horns
37A/F
HEATER15A/F sensor
38TRNHAZ15Turn signal lights
39ETCS10Electronic throttle control system
40EFI20Multiport fuel injection
system/sequential multiport fuel
injection system
41D FR P/W20Power window
42DR/LCK25Power door lock
43TOWING30Towing converter
44RADIO NO.230Audio system, navigation
system
45A/PUMP50Multiport fuel injection
system/sequential multiport fuel
injection system
46IGN10
Multiport fuel injection
system/sequential multiport fuel
injection system, vehicle
stability control system