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Home >> Toyota >> 2008 >> Yaris Base, 2D Hatchback, Standard >> Repair and Diagnosis >> Suspension >> Wheel Alignment >> Suspension System >> Front Wheel Alignment >> Adjustment

Front Wheel Alignment: Adjustment

  1. INSPECT TIRES (See  INSPECTION  ) 
  2. MEASURE VEHICLE HEIGHT 
    1. Hatchback:

      Vehicle height 

      FRONT WHEEL ALIGNMENT REFERENCE

      Destination A-B C-D
      Except for Rough Road Package 88 mm (3.46 in.) 20 mm (0.79 in.)
      Rough Road Package 68 mm (2.68 in.) 0 mm (0 in.)

      Measuring points: 

      A: Ground clearance of front wheel center 

      B: Ground clearance of lower arm set front bolt center 

      C: Ground clearance of rear wheel center 

      D: Ground clearance of axle beam set bolt center 

      NOTE: Before inspecting the wheel alignment, check the vehicle height.

      HINT:

      Bounce the vehicle up and down at the corners to stabilize the suspension before inspecting the vehicle height.

      Fig 1: Measuring Vehicle Height
      G04832032Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Sedan:

      Vehicle height 

      FRONT WHEEL ALIGNMENT REFERENCE

      Destination A-B C-D
      Except for Rough Road Package 87 mm (3.43 in.) 16 mm (0.63 in.)
      Rough Road Package 67 mm (2.64 in.) -2 mm (-0.08 in.)

      Measuring points: 

      A: Ground clearance of front wheel center 

      B: Ground clearance of lower arm set front bolt center 

      C: Ground clearance of rear wheel center 

      D: Ground clearance of axle beam set bolt center 

      NOTE: Before inspecting the wheel alignment, check the vehicle height.
      Fig 2: Measuring Vehicle Height For Sedan
      G04832033Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      Bounce the vehicle up and down at the corners to stabilize the suspension before inspecting the vehicle height.

  3. INSPECT TOE-IN 

    Toe-in: Hatchback 

    TOE-IN REFERENCE

    A+B C-D
    0°09'+-0°13' (0.15° +- 0.22°) 1.5 +- 2.0 mm (0.06 +- 0.08 in.)

    Sedan 

    TOE-IN REFERENCE

    A+B C-D
    0°12'+-0°06' (0.20°+-0.10°) 2.0 +- 2.0 mm (0.08 +- 0.08 in.)
    Fig 3: Adjusting Toe-In
    G04832034Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    Only measure C-D when A+B can not be measured. If the toe-in is not within the specified value, adjust it at the rack ends.

  4. ADJUST TOE-IN 
    1. Measure the thread lengths of the right and left rack ends.

      Standard: Difference in thread length of 1.5 mm (0.059 in.) or less 

    2. Remove the rack boot set clips.
    3. Loosen the tie rod end lock nuts.
    4. Adjust the rack ends if the difference in thread length between the right and left rack ends is not within the specified range.
      Fig 4: Locating Right & Left Rack Ends
      G04832035Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Extend the shorter rack end if the measured toe-in deviates toward the outer-side.
      2. Shorten the longer rack end if the measured toe-in deviates toward the inner-side.
    5. Turn the right and left rack ends by an equal amount to adjust the toe-in.

      HINT:

      Try to adjust the toe-in to the center of the specified range.

    6. Make sure that the lengths of the right and left rack ends are the same.

      Toe-in 

      TOE-IN REFERENCE

      Body Type Toe-in
      Hatchback 1.5 +- 1.0 mm (0.06 +- 0.04 in.)
      Sedan 2.0 +- 1.0 mm (0.08 +- 0.04 in.)
    7. Tighten the tie rod end lock nuts to the specified torque.

      Torque: 75 N*m (760 kgf*cm, 55 ft.*lbf) 

      NOTE: Provisionally tighten the lock nut while holding the hexagonal part of the steering rack end so that the lock nut and the steering rack end do not turn together. Hold the width across flat of the tie rod end and tighten the lock nut.
    8. Place the boots on the seats.
    9. Using pliers, install the clip.
      NOTE: Make sure that the boots are not twisted.
      Fig 5: Tightening Tie Rod End Lock Nuts To Specified Torque
      G04832036Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT WHEEL TURNING ANGLE 
    1. Fully turn the steering wheel left and right, and measure the wheel turning angle.
      Fig 6: Inspecting Wheel Turning Angle
      G04832037Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Wheel turning angle 

      WHEEL TURNING ANGLE REFERENCE

      Destination Inside Wheel Outside Wheel (Reference)
      Except for Rough Road Package 40°57'+-2° (40.95° +- 2°) 35°17' (35.29°)
      Rough Road Package 41°22'+-2° (41.37°+-2°) 35°45' (35.75°)

      If the right and left inside wheel angles are not within the specified range, check the right and left rack end lengths.

  6. INSPECT CAMBER, CASTER AND STEERING AXIS INCLINATION 
    1. Put the front wheel on the center of the alignment tester.
    2. Remove the wheel cap.
    3. Set the camber-caster-steering axis inclination gauge at the center of the axle hub or drive shaft.
    4. Inspect the camber, caster and steering axis inclination.
      Fig 7: Putting Front Wheel On Center Of Alignment Tester
      G04832038Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Camber, caster and steering axis inclination: Hatchback 

      CAMBER, CASTER AND STEERING AXIS INCLINATION

      Destination Camber Caster Steering Axis Inclination (Reference)
      Except for Rough Road Package -0°10'+-45' (-0.17°+-0.75°) 4°46'+-45' (4.77°+-0.75°) 11°18' (11.30°)
      Rough Road Package 0°06' +- 45' (0.10°+-0.75°) 4°27'+-45' (4.45°+- 0.75°) 10°47' (10.78°)

      Sedan 

      CAMBER, CASTER AND STEERING AXIS INCLINATION

      Destination Camber Caster Steering Axis Inclination (Reference)
      Except for Rough Road Package -0°10'+-45' (-0.17°+-0.75°) 4°39' +- 45' (4.65°+-0.75°) 11°16' (11.27°)
      Rough Road Package 0°06' +- 45' (0.10°+-0.75°) 4°23' +- 45' (4.38°+-0.75°) 10°47' (10.78°)
      NOTE:
      • Perform the inspection while the vehicle is empty (without a spare tire or tools on board).
      • The tolerance for the difference between the left and right wheels is 30' (0.5°) or less for both the camber and caster.
    5. Remove the camber-caster-steering axis inclination gauge and attachment.
    6. Install the wheel cap.

      If the caster and steering axis inclination are not within the specified values after the camber has been correctly adjusted, recheck the suspension parts for damage and wear.

  7. ADJUST CAMBER 
    NOTE: Inspect the toe-in after the camber has been adjusted.
    1. Remove the front wheel.
    2. w/ ABS:
      1. Remove the bolt and separate the speed sensor and flexible hose.
        Fig 8: Identifying Front Speed Sensor (With ABS) Bolt
        G04831953Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the 2 nuts on the lower side of the shock absorber.

      HINT:

      Keep the bolt from rotating while loosening and removing the nuts.

    4. Clean the installation surfaces of the shock absorber and steering knuckle.
    5. Provisionally install the 2 nuts (Step  a).
      Fig 9: Locating Shock Absorber Nuts
      G04832040Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Fully push or pull the axle hub in the direction of the required adjustment (Step  b).
      Fig 10: Pulling Axle Hub
      G04832041Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Tighten the 2 nuts.

      Torque: 164 N*m (1,672 kgf*cm, 121 ft.*lbf) 

      HINT:

      Keep the bolt from rotating while loosening and removing the nuts.

      Fig 11: Locating Shock Absorber Nuts
      G04832040Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. w/ ABS:
      1. Install the flexible hose and speed sensor with the bolt.

        Torque: 29 N*m (300 kgf*cm, 22 ft.*lbf) 

        NOTE: Install the flexible hose and speed sensor without twisting them.
    9. Install the front wheel.

      Torque: 103 N*m (1,050 kgf*cm, 76 ft.*lbf) 

      Fig 12: Identifying Front Speed Sensor (With ABS) Bolt
      G04831953Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    10. Check the camber.

      If the measured value is not within the specification, calculate the required adjustment amount using the formula below.

      (Camber adjustment amount) = Center of specified range - Measured value

      Check the combination of installed bolts. Select appropriate bolts from the table below to adjust the camber to within the specified range.

      HINT:

      Try to adjust the camber to the center of the specified range.

      Fig 13: Identifying Strut Bolts
      G04832044Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      CAMBER SPECIFICATIONS

      Move axle toward (+) in step (B) Refer to Fig 14 (Move axle toward positive side)
      Move axle toward (-) in step (B) Refer to Fig 15 (Move axle toward negative side)
    11. Table (1) (Move the axle toward the positive side).
      Fig 14: Bolt Shape & Specifications Table
      G04832045Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    12. Table (2) (Move the axle toward the negative side).
      Fig 15: Bolt Shape Reference Table
      G04832046Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      The body and suspension may be damaged if the camber is not correctly adjusted in accordance with Fig 15 .

      NOTE: Replace the nut with a new one when replacing the bolt.
    13. Repeat the steps mentioned above. At step (A), replace 1 or 2 selected bolts.

      HINT:

      Replace one bolt at a time when replacing 2 bolts.