2005 Lexus ES330 ECU

MAINTENANCE
328Battery
Check the battery condition by the indicator color. See page
396 for additional information.
Brake fluid level
Make sure the brake fluid level is correct. See page 364 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 351 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 365 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 255.)
Vehicle interior
Items listed below should be checked regularly, e.g. while
performing periodic services, cleaning the vehicle, etc.
Lights
Make sure the headlight, 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 freeplay. Be alert for changes
in steering condition, such as hard steering, excessive freeplay
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.
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.

MAINTENANCE
329
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 freeplay. Check the brake booster function.
Brakes
In a safe place, check that the brakes do not pull to one side
when applied.
Parking brake
Check that the pedal has the proper travel and that, on a safe
incline, your vehicle is held securely with only the parking brake
applied.
Automatic transmission “Park” mechanism
On a safe incline, check that your vehicle is held securely with
the selector lever in “P” position and all brakes released.
Vehicle exterior
Items listed below should be performed from time to time,
unless otherwise specified.
Wheel nuts
When checking the tires, make sure to check the nuts for
looseness. Tighten them if necessary.
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 doors, including trunk lid, operate smoothly and
all latches lock securely. Make sure the engine hood
secondary latch secures the hood when the primary latch is
released.

ELECTRICAL COMPONENTS
392
No.FUSEAMPERECIRCUIT
1A/F25Multiport fuel injection
system/sequential multiport
fuel injection system
2DOOR125
Multiplex communication
system (power door lock
system, auto−door locking
system, wireless remote
control system)
3TEL5No circuit
4AM230All components in “IGN” and
“IG2” fuses and starting system
5EFI20Multiport fuel injection
system/sequential multiport
fuel injection system
6ALTS5Charging system
7HEAD LH
UPR10Left −hand headlight (high
beam)
No.FUSEAMPERECIRCUIT
8ETCS10Multiport fuel injection
system/sequential multiport
fuel injection system
9HORN10Horns
10IGN15Starting system
11HEAD RH
UPR10Right −hand headlight (high
beam)
12HAZ15Emergency flashers
13D.C.C30All components in “ECU− B”,
“RAD NO.1” and “DOME” fuses
14IG210
Multiport fuel injection
system/sequential multiport
fuel injection system, SRS
airbag system, seat belt
pretensioners, cruise control
system
15ST5Starting system
16ADJ PDL30Power adjustable pedals
17CDS30Electric cooling fan

ELECTRICAL COMPONENTS
393
No.FUSEAMPERECIRCUIT
18ABS No.240
Anti−lock brake system,
vehicle stability control system,
traction control system, brake
assist system
19MAIN40
All components in “HEAD LH
LWR”, “HEAD RH LWR”, “HEAD
LH UPR”, “HEAD RH UPR” and
“DRL” fuses
20ABS No.330
Anti −lock brake system,
vehicle stability control system,
traction control system, brake
assist system
21HTR50Air conditioning system
22RDI30Electric cooling fan
23SPARE5Spare fuse
24SPARE10Spare fuse
No.FUSEAMPERECIRCUIT
25ABS NO.150
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 stability control
system, traction control
system, brake assist system
26ALT120
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
27SPARE15Spare fuse
28A/C10No circuit
29DRL5Daytime running light system
30HEAD RH
LW R15Right −hand headlight (low
beam)
31HEAD LH
LW R15Left −hand headlight (low
beam) and front fog lights

ELECTRICAL COMPONENTS
394
No.FUSEAMPERECIRCUIT
32ECUB10
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, front
passenger seat position
memory system
33DOME7.5
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
No.FUSEAMPERECIRCUIT
34CIG15Cigarette lighter
35ECU
ACC5
Power rear view mirrors, clock,
multi −information display,
driving position memory
system, front passenger seat
position memory system
36RAD NO.210Audio system, navigation
system
37POWER
POINT15Power outlet
38RAD NO.120Audio system, navigation
system
39GAUGE110
Gauges and meters, clock,
outside temperature gauge,
multi −information display, shift
lock system
40ECUIG10
SRS airbag system, power
windows, anti− lock brake
system, electronic modulated
suspension, driving position
memory system, front
passenger seat position
memory system
41WIPER25Windshield wipers
42HTR10Air conditioning system