Front Wheel Alignment

ALIGNMENT / HANDLING DIAGNOSIS: FRONT WHEEL ALIGNMENT: ADJUSTMENT

NOTICE:
If the wheel alignment has been adjusted, and if suspension or underbody components have been removed/installed or replaced, be sure to perform the following initialization procedure in order for the system to function normally:

* Perform zero point calibration of the yaw rate and acceleration sensor and the test mode inspection.

1. INSPECT TIRES

(a) Inspect the tires Component Tests and General Diagnostics.

2. MEASURE VEHICLE HEIGHT

NOTICE:
Before inspecting the wheel alignment, adjust the vehicle height to the specification.

(a) Press down on the vehicle several times to stabilize the suspension, and then measure the vehicle height.

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Measuring points:

A
Ground clearance of the center of the front wheel

B
Ground clearance of the center of the front adjusting cam bolt

C
Ground clearance of the center of the rear wheel

D
Ground clearance of the center of the rear lower control arm front side

If the vehicle height is not as specified, adjust the height by pressing down on the vehicle several times to stabilize the suspension.

Standard Vehicle Height (Unloaded Vehicle):

NOTICE:
The standard value shown here is a value that is used for adjusting the wheel alignment and does not indicate the height of an actual vehicle.

3. INSPECT CAMBER, CASTER AND STEERING AXIS INCLINATION

(a) Install a camber-caster-kingpin gauge or place the front wheels on the center of a wheel alignment tester.

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(b) Inspect the camber, caster and steering axis inclination.

Standard Camber Inclination (Unloaded Vehicle):

Standard Caster Inclination (Unloaded Vehicle):

Standard Steering Axis Inclination (Unloaded Vehicle):

4. ADJUST CAMBER AND CASTER

HINT
After the camber has been adjusted, inspect the toe-in.

(a) Loosen the front adjusting cam bolt and rear adjusting cam nut.

(b) Turn the front adjusting cam and rear adjusting cam in both directions, and adjust the camber and caster to the center value.

HINT
* The camber and caster should be as close as possible to the center value.
* Adjust the camber and caster within +/-30'.

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(1) Find the wheel alignment standard value applicable for the particular model.

(2) Mark the selected standard value on the adjustment chart.

Standard Value (Reference)

(3) Mark the alignment value measured when the vehicle is unloaded on the adjustment chart.

Measured Value (Reference)

(4) As shown in the chart, read the distance from the marked point to 0, and adjust the front and/ or rear adjusting cams accordingly.

Amount to Turn Adjusting Cams (by Gradation)

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5. INSPECT TOE-IN

(a) Bounce the vehicle up and down at the corners to stabilize the suspension and inspect the toe-in.

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Standard Toe-in (Unloaded Vehicle):

If the toe-in is not within the specified range, adjust it at the rack ends.

6. ADJUST TOE-IN

(a) Detach the rack boot set clips.

(b) Loosen the tie rod end lock nuts.

(c) Turn the right and left rack ends by an equal amount to adjust the toe-in to the center value.

(d) Check that the lengths of the right and left rack ends are approximately the same.

Standard difference:

0 +/-1 mm (0 +/-0.0394 in.) or less

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(e) Tighten the tie rod end lock nuts.

Torque : 88 Nm (897 kgf-cm, 65 ft-lbf)

(f) Place the boots on the seats and install the clips.

HINT
Make sure that the boots are not twisted.

7. INSPECT WHEEL ANGLE

(a) Turn the steering wheel to the left and right full lock positions, and measure the turning angle.

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Standard Wheel Turning Angle (Unloaded Vehicle):

If the right and left inside wheel angles differ from the specified range, check the right and left rack end lengths.

8. PLACE FRONT WHEELS FACING STRAIGHT AHEAD

9. PERFORM YAW RATE SENSOR ZERO POINT CALIBRATION

HINT
Perform the yaw rate sensor zero point calibration Programming and Relearning.

10. PERFORM INITIALIZATION

HINT
Some systems need to be initialized after the wheel alignment is adjusted Repair Instruction - Initialization.