Page 1 of 28
SECTION 6 ± 3
412
SERVICE PROCEDURES AND
SPECIFICATIONS
Chassis
Specifications (GS400) 413. . . . . . . . . . . . . . . . . . . . . . . .
Specifications (GS300) 416. . . . . . . . . . . . . . . . . . . . . . . .
Checking brake fluid 420. . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking power steering fluid (GS400) 422. . . . . . . . . .
Checking power steering fluid (GS300) 426. . . . . . . . . .
Checking tire pressure 429. . . . . . . . . . . . . . . . . . . . . . . . .
Rotating tires 432. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking and replacing tires 433. . . . . . . . . . . . . . . . . . .
Installing snow tires and chains 436. . . . . . . . . . . . . . . . .
Replacing wheels 438. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Aluminum wheel precautions 438. . . . . . . . . . . . . . . . . . .
Suspension and chassis 439. . . . . . . . . . . . . . . . . . . . . . .
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CHASSIS
415 ± TIRES AND WHEELS
Tire size
Tire inflation pressure
Recommended cold tire inflation pressure
225/55R16 94V
235/45ZR17
Wheel size
Wheel nut torque
Type A: 225/55R16 94V
Type B: 235/45ZR17
Front 220 kPa (2.2 kgf/cm
2
or bar, 32 psi)
Rear 220 kPa (2.2 kgf/cm2 or bar, 32 psi)
Front 230 kPa (2.3 kgf/cm2
or bar, 33 psi)
Rear 230 kPa (2.3 kgf/cm2 or bar, 33 psi)
For sustained high speeds above 160 km/h (100
mph), in countries where such speeds are permitted
by law, add 70 kPa (0.8 kgf/cm
2, 0.7 bar, 10 psi) to the
front tires and rear tires, but never exceed the
maximum cold tire pressure molded on the tire
sidewall.
Type A: 16 x 7
1/2 JJ
Type B: 17 x 8 JJ
103 N´m (10.5 kgf´m, 76 ft´lbf.)
NOTE: For complete information on tires (e.g. replacing tires or replacing wheels), see ªChecking tire pressureº through
ªAluminum wheel precautionsº on page 429 through 438.
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CHASSIS
418± TIRES AND WHEELS (Type A)
Tire size
Tire inflation pressure
Recommended cold tire inflation pressure
Wheel size
Wheel nut torque
P215/60R16 94V
Front 210 kPa (2.1 kgf/cm
2
or bar, 30 psi)
Rear 210 kPa (2.1 kgf/cm2 or bar, 30 psi)
For sustained high speeds above 160 km/h (100
mph), in countries where such speeds are permitted
by law, add 90 kPa (1.0 kgf/cm
2, 0.9 bar, 13 psi) to the
front tires and rear tires, but never exceed the
maximum cold tire pressure molded on the tire
sidewall.
16 x 7
1/2 JJ
103 N´m (10.5 kgf´m, 76 ft´lbf.)
NOTE: For complete information on tires (e.g. replacing tires or replacing wheels), see ªChecking tire pressureº through
ªAluminum wheel precautionsº on page 429 through 438.
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CHASSIS
419 ± TIRES AND WHEELS (Type B)
Tire size
Tire inflation pressure
Recommended cold tire inflation pressure
Wheel size
Wheel nut torque
225/55R16 94V
Front 220 kPa (2.2 kgf/cm
2
or bar, 32 psi)
Rear 220 kPa (2.2 kgf/cm2 or bar, 32 psi)
For sustained high speeds above 160 km/h (100
mph), in countries where such speeds are permitted
by law, add 80 kPa (0.9 kgf/cm
2, 0.8 bar, 12 psi) to the
front tires and rear tires, but never exceed the
maximum cold tire pressure molded on the tire
sidewall.
16 x 7
1/2 JJ
103 N´m (10.5 kgf´m, 76 ft´lbf.)
NOTE: For complete information on tires (e.g. replacing tires or replacing wheels), see ªChecking tire pressureº through
ªAluminum wheel precautionsº on page 429 through 438.
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CHASSIS
430
63G005
The recommended cold tire pressures, tire size and
the vehicle capacity weight are given on the label.
You should check the tire pressures every two weeks, or
at least once a month. And don't forget the spare! The
pressure for the spare tire should be the same with that
for the standard tire. (See page 415 or 418.) Incorrect
tire pressure can reduce tire life and make your vehicle
less safe to drive.
Low tire pressure results in excessive wear, poor
handling, reduced fuel economy, and the possibility of
blowouts from overheated tires. Also, low tire pressure
can cause poor sealing of the tire bead. If the tire
pressure is excessively low, there is the possibility of
wheel deformation and/or tire separation. So keep your
tire pressures at the proper level. If a tire needs frequent
refilling, have it checked by your Lexus dealer.
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CHASSIS
432
ROTATING TIRES
63L008-1
To equalize tire wear and help extend tire life, Lexus
recommends that you rotate your tires
approximately every 12000 km (7500 miles).
However, the most appropriate timing for tire
rotation may vary according to your driving habits
and road surface conditions.
The wheel assemblies must be rotated as illustrated
above.
When rotating tires, check for uneven wear and
damage. Abnormal wear is usually caused by incorrect
tire pressure, improper wheel alignment, out±of balance
wheels, or severe braking.
Before storing radial, snow or studded tires, mark the
direction of rotation and be sure to install them in the
same direction when using them again. Tires should be
stored in a cool dry place.
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CHASSIS
435 tire's ability to stop on wet pavement as measured under
controlled conditions on specified government test
surfaces of asphalt and concrete. A tire marked C may
have poor traction performance.Warning: The traction grade assigned to this tire is
based on braking (straight ahead) traction tests and
does not include cornering (turning) traction.
Temperature A, B, C ± The temperature grades are A
(the highest), B, and C, representing the tire's resistance
to the generation of heat and its ability to dissipate heat
when tested under controlled conditions on a specified
indoor laboratory test wheel. Sustained high
temperature can cause the material of the tire to
degenerate and reduce tire life, and excessive
temperature can lead to sudden tire failure. The grade
C corresponds to a level of performance which all
passenger car tires must meet under the Federal Motor
Vehicle Safety Standard No. 109. Grades B and A
represent higher levels of performance on the laboratory
test wheel than the minimum required by law.
Warning: The temperature grades for this tire are
established for a tire that is properly inflated and not
overloaded. Excessive speed, underinflation, or
excessive loading, either separately or in combination,
can cause heat buildup and possible tire failure.
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CHASSIS
436
Tire selection
When replacing a tire, use only the same size and
construction as originally installed and with the
same or greater load capacity.
Using any other size or type of tire may seriously affect
handling, ride, speedometer/odometer calibration,
ground clearance, and clearance between the body and
tires or snow chains.Do not mix radial, belted, or conventional tires on
your vehicle.
Do not use tires or wheels other than the
manufacturer's recommended size.
It can cause dangerous handling characteristics,
resulting in loss of control. If you need to change from
conventional tires to radial tires or vice versa, replace
them as a set.
INSTALLING SNOW TIRES AND
CHAINS
When to use snow tires or chains
Snow tires or chains are recommended when
driving on snow or ice.
On wet or dry roads, conventional or radial tires provide
better traction than snow or studded tires.
Snow tire selection
If you need snow tires, select the same size,
construction and load capacity as the original tires
on your Lexus.
Do not use tires other than stated above. Since your
vehicle has radial tires as original equipment, make sure
your snow tires also have radial construction. Do not
install studded tires without first checking local
regulations for possible restrictions.