2004 Lexus GX470 brake light

MAINTENANCE
516Battery
Check the battery condition by the indicator color. See page
589 for additional information.
Brake fluid level
Make sure the brake fluid level is correct. See page 554 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 541 for additional
information.
Power steering fluid level
Check the level through the reservoir. The level should be in
the HOTº or COLDº range depending on the fluid
temperature. See page 555 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 cautionº on page 370.)
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 effort
or catching.
Brake pedal
Check the pedal for smooth operation and the proper
clearance and free play. Check the brake booster function.

CHASSIS
554
CHECKING BRAKE FLUID
To check the fluid level, simply look at the see-through
reservoir. The level should be between the MAXº and
MINº 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 40 times.
3. Remove the reservoir cap by hand. Add brake fluid up to the
MAXº 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 and damage painted
surfaces. If fluid gets in your eyes, flush them with clean
water immediately. If you still feel uncomfortable with
your 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
577
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.

ELECTRICAL COMPONENTS
583
No.FUSEAMPERECIRCUIT
1SPARE10Spare fuse
2ALT140
Charging system and all
components in AM1º,
HEATERº, CDS FANº, FR
FOGº, DEFOGº, AIR SUSº,
AC115V INVº, SEAT HEATERº,
BATT CHGº, TOWING BRKº
and TOWINGº fuses
3SPARE15Spare fuse
4HEATER50Air conditioning system
5AIR
SUS50Rear height control air
suspension
6AM150
All components in ACCº, CIGº,
IG1º, FR WIP-WSHº, RR
WIPº, RR WSHº, DIFFº,
TEMSº and STAº fuses
7TOWING
BRK30Trailer brake controller
8J/B50
All components in P FR P/Wº,
P RR P/Wº, D RR P/Wº, D
P/SEATº, P P/SEATº, TAILº,
PANELº and POWER OR
TI&TEº fuses
9BATT
CHG30Trailer sub battery
10TOWING40Trailer lights
11CDS FAN20Electric cooling fan
12RR A/C30Rear air conditioning system
No.FUSEAMPERECIRCUIT

ELECTRICAL COMPONENTS
585
25AIRSUS
NO.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.120Car audio system, navigation
system
29ECU-B10
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
30ECU-B
NO.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 IGNº, SRSº, GAUGEº and
ST2º fuses
No.FUSEAMPERECIRCUIT

ELECTRICAL COMPONENTS
586
33ABS
SOL50
Anti- lock brake system,
vehicle stability control system,
active traction control system,
brake assist system
34ALT-S7.5Charging system
35MAYDAY7.5Lexus link system
36HORN10Horns
37TRN-HAZ15Turn signal lights
38ETCS10Electronic throttle control system
39EFI20Multiport fuel injection
system/sequential multiport fuel
injection system
40D FR P/W20Power window
41DR/LCK25Power door lock
42TOWING30Towing converter
43RADIO
NO.230Car audio system, navigation
system
44IGN10
Multiport fuel injection
system/sequential multiport fuel
injection system, vehicle
stability control system
45SRS10SRS airbag system
46GAUGE7.5Gauges and meters
47ST27.5Multiport fuel injection
system/sequential multiport fuel
injection system
No.FUSEAMPERECIRCUIT