Lexus GX470 2003 Basic Functions / LEXUS 2003 GX470 OWNER'S MANUAL (OM60979U)

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2. Block the wheel diagonally opposite the flat tire to keep
the vehicle from rolling when it is jacked up.
When blocking the wheel, place a wheel block in front of one
of the front wheels or behind one of the rear wheels.3. Remove the wheel ornament.
Pry off the wheel ornament, using the beveled end of the wheel
ornament remover as shown.
CAUTION
Do not try to pull off the ornament by hand. Take due
care in handling the ornament to avoid unexpected
personal injury.

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4. Loosen all the wheel nuts.
Always loosen the wheel nuts before raising the vehicle.
Turn the wheel nuts counterclockwise to loosen them. To get
maximum leverage, fit the wrench to the nut so that the handle
is on the right side, as shown above. Grab the wrench near the
end of the handle and pull up on the handle. Be careful that the
wrench does not slip off the nut.
Do not remove the nuts yet − just unscrew them about one −half
turn.
CAUTION
Never use oil or grease on the bolts or nuts. The nuts
may loose and the wheels may fall off, which could
cause a serious accident.
 Front (under the frame side rail)
 Rear (under the rear axle housing)
5. Position the jack at the jack points as shown.
Make sure the jack is positioned on a level and solid surface.

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 1 Jack handle end

2 Jack handle extension with bolt

3 Jack handle extension without bolt

4 Jack handle
Put a jack handle, jack handle extensions and jack handle end
together as shown in the illustration.
CAUTION
Make sure they are securely fixed with the screws.
When connecting a jack handle extension with a jack handle
end, use a Phillips −head screwdriver or jack handle to tighten
the bolts on the joints as shown in the illustration. When
connecting the jack handle with extension, tighten the 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. Otherwise, the extension
may come off and it may damage the paint or vehicle
body.

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6. After making sure no one is in the vehicle, raise it high
enough so that the spare tire can be installed.
Allow for the fact that you need more ground clearance when
putting on the spare tire than when removing the flat tire.
To raise the vehicle, insert the jack handle extension into 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 extension. As the jack touches the vehicle and begins
to lift, double− check that it is properly positioned.
CAUTION
Never get under the vehicle when the vehicle is
supported by the jack alone.
7. Remove the wheel nuts and remove the flat tire.
Lift the flat tire straight off and put it aside.
Roll the spare wheel into position and align the holes in the
wheel with the bolts. Then lift up the wheel and get at least the
top bolt started through its hole. Wiggle the tire and press it
back over the other bolts.

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Before putting on the wheel, remove any corrosion on the
mounting surfaces with a wire brush or such. Installation of
wheels without good metal−to−metal contact at the mounting
surface can cause wheel nuts to loosen and eventually cause
a wheel to come off while driving.8. Reinstall all the wheel nuts finger tight.
Reinstall the wheel nuts and tighten them as much as you can
by hand. Press the tire back and see if you can tighten them
more.
CAUTION
Never use oil or grease on the bolts or nuts. Doing so
may lead to overtightening the nuts and damaging the
bolts. The nuts may loose 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.

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9. Lower the vehicle completely and tighten the wheel
nuts.
To lower the vehicle, turn the jack handle extension
counterclockwise with the handle, making sure the handle
remains firmly fitted onto the jack handle extension.
Use only the wheel nut wrench 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.
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 by torque wrench at
112 N·m (11.5 kgf·m, 83 ft·lbf), as soon as possible
after changing wheels. Otherwise, the nuts may
loosen and the wheels may fall off, which could cause
a serious accident.

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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 ornament to avoid
unexpected personal injury.
11. After changing the wheel, check the air pressure of the
replaced tire. Stow all the tools, jack and flat tire securely.
If the pressure of the replaced tire is low, drive slowly to the
nearest service station and fill to the correct pressure.
Do not forget to reinstall the tire valve cap as dirt and moisture
could get into the valve core and possible cause air leakage.
If the cap is missing, put a new one on as soon as possible.
This is the same procedure for changing or rotating your tires.
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 injury during a collision or
sudden braking.

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IF YOUR VEHICLE BECOMESSTUCK
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.
In this situation, lock the center differential and turn off the
vehicle skid control system. (For details, see “Fourwheel
drive system” on page 309.)
CAUTION
Do not attempt to rock the vehicle free by moving it
forward and backward if people or objects are anywhere
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 objects.
NOTICE
If you rock your vehicle, observe the following
precautions to prevent damage to the transmission and
other parts.
 Do not depress the accelerator pedal while shifting
the selector lever or before the transmission is
completely 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 towing.

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IF YOUR VEHICLE NEEDS TO BETOWED
If towing is necessary, we recommend you to have it done
by your Lexus dealer or a commercial tow truck service.
In consultation with them, have your vehicle towed using
either (a) or (b).
(a) Towing with a wheel lift type truck
(b) Using a flat bed truck
(c) Never tow with a sling type truck
Only when you cannot receive a towing service from a
Lexus dealer or commercial tow truck service, tow your
vehicle carefully in accordance with the instructions
given in “(d) Emergency towing” on page 380.
Proper equipment will help ensure that your vehicle is not
damaged while being towed. Commercial operators are
generally aware of the state/provincial and local laws
pertaining to towing.
Your vehicle can be damaged if it is towed incorrectly. Although
most operators know the correct procedure, it is possible to
make a mistake. To avoid damage to your vehicle, make sure
the following precautions are observed. If necessary, show
this page to the tow truck driver. TOWING PRECAUTIONS:
Use a safety chain system for all towing, and abide by the
state/provincial and local laws. The wheels and axle on the
ground must be in good condition. If they are damaged, use
a towing dolly.
CAUTION
When
your vehicle is towed, put the vehicle height in the
“N” (normal) mode and push the “HEIGHT CONTROL
OFF” switch to turn off the rear height control air
suspension. Otherwise, the vehicle height may be
changed in the automatic leveling function, resulting in
accident. For details, see “Rear height control air
suspension” on page 315.

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(a) Towing with a wheel lift type truck
From front
Use a towing dolly under the rear wheels.
NOTICE
Never tow a vehicle with an automatic transmission
from the front with rear wheels on the ground, as this
may cause serious damage to the transmission.
From rear
Use a towing dolly under the front wheels.
NOTICE
Never tow a vehicle with an automatic transmission
from the rear with front wheels on the ground, as this
may cause serious damage to the transmission.