2006 LEXUS LX470 ECU

MAINTENANCE
388Battery
Your Lexus has a maintenance free battery. You do not have
to add distilled water. For longer life of the battery, however,
see page 450 for additional information.
Brake fluid level
Make sure the brake fluid level is correct. See page 421 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 410 for additional
information.
Suspension fluid level
Make sure the suspension fluid level is correct. See page 423
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 422 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 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 ha s 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 −down rear
seatbacks, swing− up rear seat cushions and detachable third
seats, 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.

MAINTENANCE
389
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.
Brakes
In 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 “Park” 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 “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 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 and
loading information label. See page 424 for additional
information.
Tire surface
Check the tires carefully for cuts, damage or excessive
wear. See page 438 for additional information.

ELECTRICAL COMPONENTS
448
No.FuseAMPERECIRCUIT
17 TAIL15Parking lights, Tail lights
18 BAT30All components in “ECU−B2”
19 TEL7.5Lexus Link System
20 AMP30Audio system
21 EFI or
ECD No.125Multiport fuel injection
system/Sequential multiport fuel
injection system
22 AM215All components in “IGN”
23 ETCS10Multiport fuel injection
system/Sequential multiport fuel
injection system
24 HORN10Horns
25 HEAD
(RHLWR)10Right− hand headlight (low
beam)
26 HEAD
(LHLWR)10Left− hand headlight (low beam)
27 HEAD
(RHUPR)20Right− hand headlight (high
beam)
28 HEAD
(LHUPR)20Left− hand headlight (high beam)
29 AIR PUMP50Multiport fuel injection
system/Sequential multiport fuel
injection system
30 A/F HTR15Multiport fuel injection
system/Sequential multiport fuel
injection system
No.FuseAMPERECIRCUIT
31 PWR
OUTLET15Power outlets
32 CIG15Cigarette lighter
33 ACC7.5Instrument panel light
34 AM17.5Multiport fuel injection
system/Sequential multiport fuel
injection system
35 DEFOG20Rear window defogger
36 AHCB15Active height control suspension
(AHC)
37 FUEL HTR20Fuel heater
38 POWER HTR7.5Power heater
39 AHCIG20Active height control suspension
(AHC)
40 EFI or
ECD No.210Emission control system
41 GAUGE 110Gauges and meters
42 ECUIG 110Multiport fuel injection
system/Sequential multiport fuel
injection system
43 ECUB110Navigation system
44 DBL
LOCK15Double lock system

ELECTRICAL COMPONENTS
449
45 A/C15Air conditioning systemNo.FuseAMPERECIRCUIT
46 STOP15Stop lights
47 OBD27.5On−board diagnosis system
48 IDLE UP7.5Idle− up system
49 LH SEAT30Power seat system
50 DOOR25Power door lock system, Power
windows
51 SUN
ROOF25Electronic moon roof
52 RR
WIPER15Rear wiper system
53 ECUB210Power door lock system, Power
window
54 DIFF20Four− wheel drive system
55 WASHER15Windshield washer
56 RADIO10Audio system
57 DOME10Interior lights
58 VGRS40Variable gear ratio steering
system
59 P/W (FL)20Power window
60 P/W (RL)20Power window
61 WIPER25Windshield wiper
62 ECUIG 210Rear air conditioning system

ELECTRICAL COMPONENTS
450
No.FuseAMPERECIRCUIT
63 SEATHTR15Seat heater
64 GAUGE 210Back− up lights
65 MET7.5Gauges and meters
66 IGN7.5Multiport fuel injection
system/Sequential multiport fuel
injection system
67 SECURITY7.5Theft deterrent system
68 P/W (RR)20Power window
69 P/W (FR)20Power window
70 BATT
CHARGE30Trailer charging system
71 TIL & TEL20Tilt and telescopic steering
72 RR A/C30Rear air conditioning system
73 RH SEAT30Power seat system
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 for at least 15 minutes and get immediate
medical attention. If possible, continue to apply
water with a sponge or cloth while traveling to the
medical office.