Lexus RX300 (MCU15). Manual — part 541

F02673

Front

Rear

SA107–03

Z03382

SA3213

A

B

C

D

Front

SA–4

–

SUSPENSION AND AXLE

FRONT WHEEL ALIGNMENT

LEXUS RX300 (RM785E)

FRONT WHEEL ALIGNMENT

INSPECTION

1.

MEASURE VEHICLE HEIGHT

Items

Front*

1

Rear*

2

215/70R16,

225/60R17 (LHD only)

247 mm (9.72 in.)

303 mm (11.93 in.)

*

1

: Front measuring point

Measure the distance from the ground to the center of the front
side lower suspension arm mounting bolt.
*

2

: Rear measuring point

Measure the distance from the ground to the center of the front
side strut rod mounting bolt.
NOTICE:
Before inspecting the wheel alignment, adjust the vehicle
height to the specification.
If the vehicle height is not within the specification, try to adjust
it by pushing down on or lifting the body.

2.

INSTALL CAMBER–CASTER–KINGPIN GAUGE OR
POSITION VEHICLE ON WHEEL ALIGNMENT TES-
TER

Follow the specific instructions of the equipment manufacturer.
3.

INSPECT CAMBER, CASTER AND STEERING AXIS
INCLINATION

Camber

Left–right error

–0°24’ ± 45’ (–0.40° ± 0.75°)

45’ (0.75°) or less

Caster

Left–right error

2°09’ ± 45’ (2.15° ± 0.75°)

45’ (0.75°) or less

Steering axis inclination

Left–right error

12°16’ ± 45’ (12.27° ± 0.75°)

45’ (0.75°) or less

HINT:
If the caster and steering axis inclination are not within the spec-
ification, after the camber has been correctly adjusted, recheck
the suspension parts for damaged and/or worn out parts.

4.

INSPECT TOE–IN

Toe–in

(total)

A + B: 0°06' ± 12’ (0.1° ± 0.2°)

C – D: 1 ± 2 mm (0.04 ± 0.08 in.)

If the toe–in is not within the specification, adjust it at the rack
ends.

F14043

F14044

1

2

–

SUSPENSION AND AXLE

FRONT WHEEL ALIGNMENT

SA–5

LEXUS RX300 (RM785E)

5.

ADJUST CAMBER

NOTICE:
After the camber has been adjusted, inspect the toe–in.
(a)

Remove the front wheels and ABS speed sensor clamp.

(b)

Remove the 2 nuts on the lower side of the shock absorb-
er.

(c)

Coat the threads of the nuts with engine oil.

(d)

Temporarily install the 2 nuts.

(e)

Adjust the camber by pushing or pulling the lower side of
the shock absorber in the direction in which the camber
adjustment is required.

(f)

Tighten the nuts.
Torque: 210 N·m (2,150 kgf·cm, 155 ft·lbf)

(g)

Install the front wheels.
Torque: 103 N·m (1,050 kgf·cm, 76 ft·lbf)

(h)

Check the camber.

HINT:

S

Try to adjust the camber to the center value.

S

Adjusting value for the set bolts is 6’ – 30’ (0.1° – 0.5°).

If the camber is not within the specification, using the following
table, estimate for how much additional camber adjustment will
be required, and select the camber adjusting bolt.

F01195

Bolt

Adjusting
Value

Set Bolt

15’

30’

Adjusting Bolt

90105–17001

90105–17003 90105–17004

90105–17005

45’

1°00’

1°15’

1°30’

1

2

1

2

1

2

1

2

1 Dot

2 Dots

3 Dots

F02668

F02669

SA–6

–

SUSPENSION AND AXLE

FRONT WHEEL ALIGNMENT

LEXUS RX300 (RM785E)

(i)

Follow the steps described above again. Between step
(b) and (c), exchange 1 or 2 selected bolts.

HINT:
When exchanging the 2 bolts, exchange 1 bolt for each time.

6.

ADJUST TOE–IN

(a)

Remove the boot clamps.

(b)

Loosen the tie rod end lock nuts.

(c)

Turn the left and right rack ends by an equal amount to
adjust the toe–in.

HINT:
Try to adjust the toe–in to the center value.

(d)

Make sure that the lengths of the left and right rack ends
are the same.
Rack end length difference: 1.5 mm (0.059 in.) or less

(e)

Torque the tie rod end lock nuts.
Torque: 74 N·m (750 kgf·cm, 55 ft·lbf)

(f)

Place the boot on the seat and install the clip to it.

HINT:
Make sure that the boots are not twisted.

SA0028

A: Inside
B: Outside

A

B

Front

B

A

–

SUSPENSION AND AXLE

FRONT WHEEL ALIGNMENT

SA–7

LEXUS RX300 (RM785E)

7.

INSPECT WHEEL ANGLE

Turn the steering wheel fully, and measure the turning angle.

LHD models:

Inside wheel

30°53’ ± 1°30’ (30.88° ± 1.5°)

Reference: Outside wheel

27°46’ (27.77°)

RHD models:

Inside wheel

34°17’ ± 1°30’ (34.28° ± 1.5°)

Reference: Outside wheel

30°11’ (30.18°)

If the wheel angles differ from the specification, check the
lengths of the left and right rack ends.