2003 Lexus ES300 light

CHASSIS
322
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. So be sure to keep the reservoir filled.
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.
Remove and replace the reservoir cap by hand. Add brake
fluid up to the “MAX” line.
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 hands or eyes, flush them
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
331
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
Do not use wheels other than the manufacturer’s
recommended size, as this may cause dangerous
handling characteristics resulting in loss of control.
Otherwise, an accident may occur resulting in death or
serious injuries.
ALUMINUM WHEEL PRECAUTIONS
 When installing aluminum wheels, check that the wheel
nuts are tight after driving your vehicle the first 1600 km
(1000 miles).
 If you have rotated, repaired, or changed your tires, check
that the wheel nuts are still tight after driving 1600 km (1000
miles).
 When using tire chains, be careful not to damage the
aluminum wheels.
 Use only the Lexus wheel nuts and wrench designed for
your aluminum wheels.
 When balancing your wheels, use only Lexus balance
weights or equivalent and a plastic or rubber hammer.
 As with any wheel, periodically check your aluminum
wheels for damage. If damaged, replace immediately.

SECTION 6 – 4
334
SERVICE PROCEDURES AND
SPECIFICATIONS
Electrical components
Specifications335
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
Checking battery condition 341
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery recharging precautions 344
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking and replacing the blade type fuses 344
. . . . . . . . . . . . . . . .
Checking the cartridge type fuses 347
. . . . . . . . . . . . . . . . . . . . . . . . . .
Adding washer fluid 348
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
.
Checking the headlight aim 349
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing light bulbs 350
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\

ELECTRICAL COMPONENTS
337
No.FUSEAMPERECIRCUIT
1 ABS NO.47.5
Anti−lock brake system,
vehicle skid control system,
traction control system, brake
assist system
2 A/F25Multiport fuel injection
system/sequential multiport
fuel injection system
3 DOOR125
Multiplex communication
system (power door lock
system, auto −door locking
system, wireless remote
control system)
4 TEL5No circuit
5 AM230All components in “IGN” and
“IG2” fuses and starting system
6 EFI20Multiport fuel injection
system/sequential multiport
fuel injection system
7 ALTS5Charging system
8 HEAD LH
UPR10Left −hand headlight (high
beam)
No.FUSEAMPERECIRCUIT
9 ETCS10Multiport fuel injection
system/sequential multiport
fuel injection system
10 HORN10Horns
11 IGN15Starting system
12 HEAD RH
UPR10Right −hand headlight (high
beam)
13 HAZ15Emergency flashers
14 D.C.C30All components in “ECU− B”,
“RAD NO.1” and “DOME” fuses
15 IG210
Multiport fuel injection
system/sequential multiport
fuel injection system, SRS
airbag system, front seat belt
pretensioners, cruise control
system
16 ST5Starting system
17 ADJ PDL30Power adjustable pedals
18 CDS30Electric cooling fan

ELECTRICAL COMPONENTS
338
No.FUSEAMPERECIRCUIT
19 ABS NO.240
Anti−lock brake system,
vehicle skid control system,
traction control system, brake
assist system
20 MAIN40
All components in “HEAD LH
LWR”, “HEAD RH LWR”, “HEAD
LH UPR”, “HEAD RH UPR” and
“DRL” fuses
21 ABS NO.340
Anti −lock brake system,
vehicle skid control system,
traction control system, brake
assist system
22 HTR50Air conditioning system
23 RDI30Electric cooling fan
24 SPARE5Spare fuse
25 SPARE10Spare fuse
26 ABS NO.160
All components in “RDI FAN”,
“ABS NO.2”, “ABS NO.3”,
“CDS”, “HTR (50 A)” and “ADJ
PDL” fuses and anti −lock brake
system, vehicle skid control
system, traction control
system, brake assist system
No.FUSEAMPERECIRCUIT
27 ALT120
All components in “DEF”, “PWR
NO.1”, “PWR NO.2”, “PWR
NO.3”, “PWR NO.4”, “STOP”,
“DOOR NO.2”, “OBD”, “PWR
SEAT”, “FUEL OPEN”, “FOG”,
“AMP”, “PANEL”, “TAIL”,
“AM1”, “CIG”, “POWER
POINT”, “RAD NO.2”,
“ECU− ACC”, “GAUGE1”,
“GAUGE2”, “ECU− IG”,
“WIPER”, “WASHER”, “HTR
(10 A)”, “SEAT HTR” and
“SUN− SHADE” fuses
28 SPARE15Spare fuse
29 A/C10Air conditioning system
30 DRL5Daytime running light system
31 HEAD RH
LW R15Right −hand headlight (low
beam)
32 HEAD LH
LW R15Left −hand headlight (low
beam) and front fog lights

ELECTRICAL COMPONENTS
339
No.FUSEAMPERECIRCUIT
33 ECUB10
Multiplex communication
system (power door lock
system, security system,
auto−door locking system,
automatic light control system,
headlight delay off system, tail
light auto cut system,
illuminated entry system,
daytime running light system,
wireless remote control
system) air conditioning
system, electronic modulated
suspension, driving position
memory system
34 DOME7.5
Ignition switch light, interior
light, personal lights, foot
lights, door courtesy lights,
trunk light, vanity lights, garage
door opener, clock, outside
temperature gauge,
multi− information display
35 CIG15Cigarette lighter
36 ECU
ACC5
Power rear view mirrors, clock,
multi− information display,
driving position memory
system
No.FUSEAMPERECIRCUIT
37 RAD NO.210Car audio system, navigation
system
38 POWER
POINT15Power outlet
39 RAD NO.120Car audio system, navigation
system
40 GAUGE110
Gauges and meters, clock,
outside temperature gauge,
multi −information display, shift
lock system
41 ECUIG10
SRS airbag system, power
windows, anti− lock brake
system, electronic modulated
suspension, driving position
memory system
42 WIPER25Windshield wipers
43 HTR10Air conditioning system
44 MIR
HTR10Outside rear view mirror
heaters

ELECTRICAL COMPONENTS
340
No.FUSEAMPERECIRCUIT
45 AM15Starting system
46 FOG15Front fog lights
47 SUN
SHADE15Rear sunshade
48 GAUGE210
Auto anti −glare inside rear
view mirror, compass, back −up
lights, automatic light control
system, automatic headlight
leveling system, cruise control
system, seat belt reminder
lights
49 PANEL10
Glove box light, console box
light, clock, outside
temperature gauge,
multi− information display,
instrument cluster lights,
instrument panel lights,
overdrive −off indicator light
50 TAIL10Tail lights, parking lights,
license plate lights
51 PWR NO.420Rear passenger’s power
window (left side)
No.FUSEAMPERECIRCUIT
52 PWR NO.220Front passenger’s door lock
system, front passenger’s
power window
53 OBD7.5On −board diagnosis system
54 SEAT
HTR20Seat heaters
55 WASHER15Windshield washer
56 FA NRLY10Electric cooling fans
57 STOP15Stop lights, high mounted stop-
light
58 FUEL
OPEN5Fuel filler door opener
59 DOOR NO.225
Multiplex communication
system (power door lock
system, auto −door locking
system, wireless remote
control system)
60 AMP25Car audio system
61 PWR NO.320Rear passenger’s power
window (right side)

ELECTRICAL COMPONENTS
341
No.FUSEAMPERECIRCUIT
62 PWR
SEAT30Power seats, driving position
memory system
63 PWR NO.130Driver’s door lock system,
driver’s power window, electric
moon roof
64 DEF40Rear window defogger
CHECKING BATTERY CONDITION
Precautions
CAUTION
BATTERY PRECAUTIONS
The battery produces flammable and explosive
hydrogen gas.
 Do not cause a spark by contacting the battery
terminals with tools.
 Do not smoke or light a match near the battery.
The electrolyte contains poisonous and corrosive
sulfuric acid.
 Avoid contact with eyes, skin or clothes.
 Never inhale or swallow electrolyte.
 Wear protective safety glasses when working near
the battery.
 Keep children away from the battery.
EMERGENCY MEASURES
 If electrolyte gets in your eyes, flush your eyes with
clean water immediately and get immediate medical
attention. If possible, continue to apply water with a
sponge or cloth while traveling to the medical office.