Front Wheel Alignment: Inspection

NOTICE:

After adjusting wheel alignment perform the VGRS calibration.

HINT:

For the steering wheel off-center, perform the "steering off-center" (See STEERING WHEEL OFF-CENTER ).
Check that the "STRAIGHT ANG FLG" is "VALID" in the DATA LIST (See PRE-CHECK step 5.).

MEASURE VEHICLE HEIGHT
Vehicle height

Fig 1: Vehicle Height Table
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Measuring points:
1. A: Ground clearance of spindle center
2. B: Ground clearance of lower suspension arm front bolt center
3. C: Ground clearance of rear axle shaft center
4. D: Ground clearance of lower control arm front bolt center
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.

Fig 2: Measuring Vehicle Height
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INSTALL CAMBER-CASTER-KINGPIN GAUGE OR POSITION VEHICLE ON WHEEL ALIGNMENT TESTER
Follow the specific instructions of the equipment manufacturer.
INSPECT CAMBER, CASTER AND STEERING AXIS INCLINATION

Fig 3: Positioning Vehicle On Wheel Alignment Tester
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Fig 4: Camber, Caster & Steering Axis Inclination Specification Table
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If the steering axis inclination is not within the specification, after the camber and caster have been correctly adjusted, recheck the steering knuckle front wheel for bearing or looseness.
INSPECT TOE-IN

Fig 5: Toe-In Specification Table
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Fig 6: Inspecting Toe-In
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If the toe-in is not within the specification, adjust the rack ends.
ADJUST CAMBER AND CASTER
NOTICE:

After the camber has been adjusted, inspect the toe-in.
1. Loosen the front and/or rear adjusting cam nuts.
2. Adjust the camber and caster by front and/or rear adjusting cams.
  HINT:
  
  Try to adjust the camber and caster to the center value.
  
  Fig 7: Adjusting Front & Rear Cam
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. How to read adjustment chart (using examples).
  1. Measure the present alignment.
    1. Camber: -0°20' (-0.33°)
    2. Caster: 3°15' (3.25°)
  2. Mark the difference between the standard value (A) and the measured value (B) on the Fig 8 .
    Standard value:
    1. Camber: 0°00' (0°)
    2. Caster: 3°05' (3.08°)
    3. Formula: A - B = C
    4. Camber: 0°00' - (-0°20') = 0°20'
    5. Caster: 3°05' - 3°15' = -0°10'
  3. As shown in Fig 8 , read the distance from the marked point to 0 point, and adjust the front and/or rear adjusting cams accordingly.
  1. Front cam: - (Shorter) 1.6
  2. Rear cam: - (Shorter) 3.2
  Fig 8: Adjustment Reading Graph (1 Of 2)
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  Fig 9: Adjustment Reading Graph (2 Of 2)
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4. Torque the front and/or rear adjusting cam nuts.
  1. Torque: 98 N.m (1,000 kg.cm, 72 ft.lbf)
  Fig 10: Locating Tie Rod Lock Nut
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ADJUST TOE-IN
NOTICE:

After adjusting wheel alignment perform the VGRS calibration.
1. Check or adjust the lengths of the rack ends, then adjust the toe-in.
  1. Rack end length difference: 3.0 mm (0.118 in.) or less
2. Remove the boot clamps.
3. Loosen the tie rod lock nuts.
4. Turn the left and right rack ends an equal amount to adjust the toe-in.
  HINT:
  
  Try to adjust the toe-in to the center value.
5. Tighten the tie rod lock nuts.
6. Place the boot on the seat and clamp it.
  HINT:
  
  Make sure that the boots are not twisted.
7. Perform the VGRS system calibration (See CALIBRATION ).
8. Perform the zero point calibration of yaw rate and deceleration sensor (see PRE-CHECK
Fig 11: Wheel Angle Specification Table
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INSPECT AND ADJUST WHEEL ANGLE
1. Turn the steering wheel fully, and measure the turning angle.
  
  Fig 12: Inspecting & Adjust Wheel Angle
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the wheel angles differ from the standard of the specification, inspect the toe-in.
2. When toe-in is normal after inspection, adjust wheel angle with the knuckle stopper bolt of the lower suspension are.
  1. Torque: 44 N.m (450 kg.cm, 32 ft.lbf)
Fig 13: Locating Knuckle Stopper Bolt
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