ECU TOYOTA LAND CRUISER 2003 J100 Service Manual

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Put a jack handle, jack handle extensions,
and jack handle end together as shown in
the illustration.
1 Jack handle end
2 Jack handle extensions
3 Jack handle
CAUTION
Make sure they are each securely
fixed with screws.
When connecting a jack handle extension
with another extension and a jack handle
end, use a jack handle to tighten the bolts
on the joints as shown in the illustration.
When connecting the jack handle with ex-
tension, tighten the wing bolt on the jack
handle securely. Make sure the hollow
meets the bolt on any joint when you
tighten the bolts.
NOTICE
Tighten all the joints securely. Other-
wise, the extension may come off and
it may damage the paint or vehicle
body.
—Raising your vehicle
6. After making sure no one is in thevehicle, raise it high enough so that
the spare tire can be installed.
Remember you will need more ground
clearance when putting on the spare tire
than when removing the flat tire.
To raise the vehicle, insert the jack handle
end into the joint of the jack (it is a loose
fit) and turn it clockwise with the handle,
making sure the handle remains firmly
fitted onto the jack handle end. As the
jack touches the vehicle and begins to lift,
doublecheck that it is properly positioned.

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—Reinstalling wheel nuts
8. Reinstall all the wheel nuts fingertight.
Reinstall the wheel nuts (tapered end in-
ward) and tighten them as much as you
can by hand. Press back on the tire and
see if you can tighten them more.
CAUTION
Never use oil or grease on the bolts
or nuts. Doing so may lead to over-
tightening the nuts and damaging the
bolts. The nuts may loosen and the
wheels may fall off, which could
cause a serious accident. If there is
oil or grease on any bolt or nut,
clean it.
—Lowering your vehicle
9. Lower the vehicle completely and tighten the wheel nuts.
Turn the jack handle extension counter-
clockwise with handle to lower the vehicle,
making sure the handle remains firmly
fitted onto the jack handle extension.
Use only the wheel nut wrench and turn
it clockwise to tighten the nuts. Do not
use other tools or any additional leverage
other than your hands, such as a hammer,
pipe or your foot. Make sure the wrench
is securely engaged over the nut.
Tighten each nut a little at a time in the
order shown. Repeat the process until all
the nuts are tight.

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CAUTION
When lowering the vehicle, make
sure all portions of your body and
all other persons around will not be
injured as the vehicle is lowered to
the ground.
Have the wheel nuts tightened with
a torque wrench to 131 N·m (13.4
kgf·m, 96.6 ft·lbf), as soon as pos-
sible after changing wheels. Other-
wise, the nuts may loosen and the
wheels may fall off, which could
cause a serious accident.
—Reinstalling wheel ornament
10. Reinstall the wheel ornament.Put the wheel ornament into position and
then tap it firmly with the side or heel of
your hand to snap it into place.
CAUTION
Take due care in handling the orna-
ment to avoid unexpected personal
injury.
—After changing wheels
11. Check the air pressure of the re- placed tire.
Adjust the air pressure to the specification
designated on page 298. If the pressure
is lower, drive slowly to the nearest ser-
vice station and fill to the correct pres-
sure.
Do not forget to reinstall the tire inflation
valve cap as dirt and moisture could get
into the valve core and possibly cause air
leakage. If the cap is missing, have a new
one put on as soon as possible.
12. Restow all the tools, jack and flat tire securely.
As soon after changing wheels as pos-
sible, tighten the wheel nuts to the torque
specified on page 298 with a torque
wrench. Have a technician repair the flat
tire.
This is the same procedure for changing
or rotating your tires.

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CAUTION
Before driving, make sure all the
tools, jack and flat tire are securely
in place in their storage location to
reduce the possibility of personal in-
jury during a collision or sudden
braking.
If your vehicle becomes stuck in snow,
mud, sand, etc., then you may attempt to
rock the vehicle free by moving it forward
and backward.
If your vehicle is equipped with the trac-
tion control system, turn off the system to
become unstuck to allow the tires to spin
enough to remove the vehicle from the
obstruction. (For details, see “Vehicle skid
control system” on page 142.)
CAUTION
Do not attempt to rock the vehicle
free by moving it forward and back-
ward if people or objects are any-
where near the vehicle. During the
rocking operation the vehicle may
suddenly move forward or backward
as it becomes unstuck, causing injury
or damage to nearby people or ob-
jects.
NOTICE
If you rock your vehicle, observe the
following precautions to prevent dam-
age to the transmission and other
parts.
 Do not depress the accelerator ped-
al while shifting the selector lever
or before the transmission is com-
pletely shifted to forward or reverse
gear.
 Do not race the engine and avoid
spinning the wheels.
 If your vehicle remains stuck after
rocking the vehicle several times,
consider other ways such as tow-
ing.
If your vehicle becomes
stuck

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CAUTION
Use extreme caution when towing ve-
hicle. Avoid sudden starts or erratic
driving maneuvers which would place
excessive stress on the emergency
towing hook and towing cable or
chain. The hook and towing cable or
chain may break and cause serious
injury or damage.
NOTICE
Do not use front and rear eyelets.
It is not designed for towing.
 Use only a cable or chain specifi-
cally intended for use in towing ve-
hicles. Securely fasten the cable or
chain to the towing hook provided.
Before towing, release the parking brake
and put the transmission in ”N”. Unlock
the center differential. The key must be in
”ACC” (engine off) or ”ON” (engine run-
ning).
CAUTION
If the engine is not running, the pow-
er assist for the brakes and steering
will not work so steering and braking
will be much harder than usual.
Before emergency towing, check that
the hook is not broken or damage and
that the installation bolts are not loose.
Fasten the towing cable or chain se-
curely to the hook.
Do not jerk the hook. Apply steady and
even force.
To avoid damaging the hook, do not
pull from the side or at a vertical
angle. Always pull straight ahead.
—Emergency towing hook
precautions

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If you are a skilled doityourself
mechanic, the Toyota service manuals are
recommended. Please be aware that
doityourself maintenance can affect your
warranty coverage. See ”Owner ’s Warranty
Information Booklet” or ”Owner ’s Manual
Supplement” for the details.
General maintenance
Listed below are the general maintenance
items that should be performed as fre-
quently as specified. In addition to check-
ing the items listed, if you notice any
unusual noise, smell or vibration, you
should investigate the cause or take your
vehicle to your Toyota dealer or a quali-
fied service shop immediately. It is recom-
mended that any problem you notice be
brought to the attention of your dealer or
the qualified service shop for their advice.
CAUTION
Make these checks only with ade-
quate ventilation if you run the en-
gine.
OUTSIDE THE VEHICLE
Items listed below should be performed
from time to time, unless otherwise
specified.
Tire pressure
Check the pressure with a gauge every
two weeks, or at least once a month. See
page 274 for additional information.Tire surface and wheel nuts
Check the tires carefully for cuts, damage
or excessive wear. See page 275 for addi-
tional information. When checking the
tires, make sure no nuts are missing, and
check the nuts for looseness. Tighten
them if necessary.
Tire rotation
Rotate the tires according to the mainte-
nance schedule. (For scheduled mainte-
nance information, please refer to the
”Scheduled Maintenance Guide” or ”Own-
er ’s Manual Supplement”.) See page 276
for additional information.
Fluid leaks
Check underneath for leaking fuel, oil, wa-
ter 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 oper-
ate smoothly and all latches lock securely.
Make sure the engine hood secondary
latch secures the hood from opening when
the primary latch is released.

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INSIDE THE VEHICLE
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 all working. Check headlight aim.
Service reminder indicators and warning
buzzers
Check that all service reminder indicators
and warning buzzers function properly.
Steering wheel
Be alert for changes in steering condition,
such as hard steering or strange noise.
Seats
Check that all front seat controls such as
seat adjusters, seatback recliner, etc. op-
erate smoothly and that all latches lock
securely in any position. Check that the
head restraint move up and down smooth-
ly and that the locks hold securely in any
latched position. For foldingdown rear
seatbacks, swingup 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 dam-
aged.
Accelerator pedal
Check the pedal for smooth operation and
uneven pedal effort or catching.
Brake pedal
Check the pedal for smooth operation and
that the pedal has the proper clearance.
Check the brake booster function.
Brakes
At 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” mecha-
nism
Check the lock release button of the se-
lector lever for proper and smooth opera-
tion. On a safe incline, check that your
vehicle is held securely with the selector
lever in ”P” position and all brakes re-
leased.
IN THE ENGINE COMPARTMENT
Items listed below should be checked
from time to time, e.g. each time when
refueling.
Washer fluid
Make sure there is sufficient fluid in the
tank. See page 285 for additional informa-
tion.
Engine coolant level
Make sure the coolant level is between
the ”FULL” and ”LOW” lines on the see
through reservoir when the engine is cold.
See page 270 for additional information.
Radiator, condenser and hoses
Check that the front of the radiator and
condenser are clean and not blocked with
leaves, dirt, or insects. See page 272 for
additional information.

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2. Turn the bulb base counterclockwiseto the front of the vehicle as shown.3. Pull the bulb out of the bulb base.
If the connector is tight, wiggle it.4. Install a new bulb base by turning it clockwise to the front of the vehicle.
LEFT–HAND HEADLIGHT: Install the
washer inlet securely.
Aiming is not necessary after replacing
the bulb. When aiming adjustment is nec-
essary, contact your Toyota dealer.

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Fuses
Engine compartment
Fuses1. ABS NO.2 40 A: Antilock brake sys-
tem
2. ABS NO.1 50 A:
Antilock brake system
3. AHC 50 A: No circuit
4. ST1 7.5 A:
Mutiport fuel injection system/
Sequential multiport fuel injection
5. TOWING 30 A: Trailer lights
6. MIR HTR 15 A: Outside rearview mirror
defogger
7. RR HTR 10 A: Rear air conditioning sys-
tem
Left side kick panel
8. HAZTRN 15 A: Emergency flashers,
Turn signal lights
9. ALTS 7.5 A: Charging system
10. NVIR 20 A: No circuit
11. FR FOG 15 A:
Fog lights
12. TOWING BRK 30 A: Trailer electric
brake
13. HEAD CLNER 20 A:
Headlight cleaner
14. FRIG 10 A: Charging system
15. PANEL 7.5 A: Instrument panel light
16. TOWING TAIL 30 A: Trailer lights
17. TAIL 15 A: Parking lights, Tail lights
Right side kick panel
18. BAT 30 A: All components in ”ECUB2”
19. TEL 7.5 A: No circuit
20. AMP 30 A: Audio system
21. EFI or ECD No.1 25 A: Multiport fuel
injection system/Sequential multiport fuel in-
jection system
22. AM2 15 A: All components in ”IGN”
23. ETCS 10 A: Multiport fuel injection sys-
tem/Sequential multiport fuel injection system
24. HORN 10 A: Horns
25. HEAD (RHLWR) 10 A: Righthand
headlight (low beam)

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26. HEAD (LHLWR) 10 A: Lefthand head-
light (low beam)
27. HEAD (RHUPR) 20 A: Righthand
headlight (high beam)
28. HEAD (LHUPR) 20 A: Lefthand head-
light (high beam)
29. PWR OUTLET 15 A: Power outlets
30. CIG 15 A: Cigarette lighter
31. ACC 7.5 A: Instrument panel light
32. AM1 7.5 A: Multiport fuel injection sys-
tem/Sequential multiport fuel injection
system
33. DEFOG 20 A:
Rear window defogger
34. AHCB 15 A: Active height control sus-
pension (AHC)
35. FUEL HTR 20 A: Fuel heater
36. POWER HTR 7.5 A: Power heater
37. AHCIG 20 A: Active height control sus-
pension (AHC)
38. EFI or ECD No.2 10 A: Emission control
system
39. GAUGE1 10 A: Gauges and meters
40. ECUIG1 10 A: Multiport fuel injection
system/S equential multiport fuel injec-
tion system
41. ECUB1 10 A:
Navigation system
42. DBL LOCK 15 A: Double lock system
43. BATT CHARGE 30 A
44. A/C 15 A:
Air conditioning system
45. STOP 15 A: Stop lights
46. OBD2 7.5 A: Onboard diagnosis system
47. IDEL UP 7.5 A: Idleup system
48. LH SEAT 30 A: Power seat system
49. DOOR 25 A: Power door lock system,
Power windows
50. SUN ROOF 25 A: Electronic moon roof
51. RR WIPER 15 A: Rear wiper system
52.ECUB2 10 A: Power door lock system,
Power window
53. DIFF 20 A: Fourwheel drive system
54. WASHER 15 A: Windshield washer
55. RADIO 10 A: Audio system
56. DOME 10 A: Interior lights
57. VGRS 40 A: Variable gear ratio steer-
ing system
58. P/W (FL) 20 A: Power window
59. P/W (RL) 20 A: Power window
60. WIPER 25 A: Windshield wiper
61. ECUIG2 10 A: Rear air conditioning
system
62. SEAT HTR 15 A: Seat heater 63. GAUGE2 10 A:
Backup lights
64. MET 7.5 A: Gauges and meters
65. IGN 7.5 A: Multiport fuel injection sys-
tem/Sequential multiport fuel injection
system
66. SECURITY 7.5 A: Theft deterrent sys-
tem
67. P/W (RR) 20 A: Power window
68. P/W (FR) 20 A: Power window
69. TIL&TEL 20 A: Tilt and telescopic
steering
70. RR A/C 30 A: Rear air conditioning
system
71. RH SEAT 30 A: Power seat system