FixVault
Home › Scion › 2009 › tC Automatic › Repair and Diagnosis › Suspension › Front Suspension › Front Wheel Alignment › Adjustment

Front Wheel Alignment: Adjustment

  1. INSPECT TIRE 
    1. Inspect tire (see INSPECTION ).
  2. MEASURE VEHICLE HEIGHT 

    Standard vehicle height 

    VEHICLE HEIGHT SPECIFICATION

    Item Specified Condition
    Front A - B 92 mm (3.62 in.)
    Rear D - C 63 mm (2.48 in.)

    Measuring points: 

    A: 

    Ground clearance of front wheel center 

    B: 

    Ground clearance of lower suspension arm front bolt center 

    C: 

    Ground clearance of tie rod set bolt center 

    D: 

    Ground clearance of rear wheel center 

    NOTE: Before inspecting the wheel alignment, adjust the vehicle height to the specified value.

    HINT:

    Bounce the vehicle at the corners to stabilize the suspension and inspect the vehicle height.

    Fig 1: Identifying Measuring Vehicle Height
    G05540057Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT TOE-IN 

    Standard toe-in 

    TOE-IN SPECIFICATION

    Item Specified Condition
    Toe-in (total) A + B: 0° +-12' (0° +- 0.2°)
    C - D: 0 +- 2 mm (0 +- 0.08 in.)

    HINT:

    • Measure "C - D" only when "A + B" connot be measured.
    • If the toe-in is not within the specified range, adjust it at the rack ends.
      Fig 2: Identifying Toe-In
      G05130660Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. ADJUST TOE-IN 
    1. Measure the thread lengths of the right and left rack ends.

      Rack end length difference: 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.
      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 in opposite directions an equal amount to adjust toe-in.

      HINT:

      Try to adjust 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.

      Standard rack end length difference: 0 +-1 mm (0.0039 in.) 

      Fig 3: Identifying Lock Nut
      G05540059Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Torque the tie rod ends lock nuts.

      Torque: 74 N*m (755 kgf*cm, 55 ft.*lbf) 

      NOTE: Temporarily tighten the lock nut while holding the hexagonal part of the steering rack ends 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 and install the clips.

      HINT:

      Make sure that the boots are not twisted.

  5. INSPECT WHEEL ANGLE 
    1. Turn the steering wheel fully to the left and right and measure the turning angle.

      Standard wheel turning angle 

      WHEEL TURNING ANGLE SPECIFICATION

      Item Specified Condition
      Inside wheel 38°12' +- 12'(38.20° +- 2°)
      Outside wheel (reference) 32°49' (32.82°)

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

      Fig 4: Measuring Wheel Turning Angle
      G05540060Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT CAMBER, CASTER AND STEERING AXIS INCLINATION 
    1. Put the front wheel on the center of the alignment tester.
    2. Remove the center ornament.
    3. Install 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.

      Standard camber, caster and steering axis inclination 

      Fig 5: Identifying Camber, Caster & Steering Axis Inclination
      G05540061Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      STEERING AXIS SPECIFICATION

      Item Specified Condition
      Camber -0°31' +- 45' (-0.52° +- 0.75°)
      Right-left error 45° (0.75°) or less
      Caster 3°02' +- 45' (3.03° +- 0.75°)
      Right-left error 45' (0.75°) or less
      Steering axis inclination 12°31' +- 45' (12.52° +- 0.75°)
      Right-left error 45' (0.75°) or less
      NOTE:
      • Inspect while the vehicle is empty (without the spare tire or tools).
      • The maximum tolerance of right and left difference for the camber and caster is 45' or less.
    5. Remove the camber-caster-steering axis inclination gauge and attachment.
    6. Install the center ornament.

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

  7. ADJUST CAMBER 

    HINT:

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

    1. Remove the front wheel.
    2. Remove the 2 nuts on the lower side of the shock absorber assembly front LH.
    3. Clean the installation surfaces of the shock absorber assembly front LH and the steering knuckle.
    4. Temporarily install the 2 nuts (Step  a).
      Fig 6: Locating Steering Knuckle Nuts
      G05540062Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Fully push or pull the front axle hub in the direction of the required adjustment (Step  b).
      6. Fig 7: Pulling Front Axle Hub
      G05540063Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Tighten the nuts.

      Torque: 240 N*m (2,450 kgf*cm, 177 ft.*lbf) 

    7. Install the front wheel.

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

    8. Check the camber.

      If the measured value is within the specified range, calculate the required adjustment amount using the formula below.

      Camber adjustment amount: 

      Center of the specified range - Measured value 

      Fig 8: Identifying Bolts
      G05540064Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. Check installed bolts combination. Select appropriate bolts from the table below to adjust the camber within the specified range.

      Standard selection table 

      STANDARD SELECTION CHART

      Item Selection Table
      Move the axle toward (+) in step (B) Refer to table (1) (Move the axle toward positive side)
      Move the axle toward (-) in step (B) Refer to table (2) (Move the axle toward positive side)

      Table (1): Move the axle toward positive side 

      Fig 9: Identifying Bolt Heads Specification Table
      G05540065Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      The body and suspension may be damaged if the camber is not correctly adjusted according to the above table.

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

      HINT:

      Replace 1 bolt at a time when replacing 2 bolts.

      Table (2): Move the axle toward negative side 

      Fig 10: Identifying Bolt Specification
      G05540066Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 11: Identifying Bolt Heads Specification Table
      G05540067Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      The body and suspension may be damaged if the camber is not correctly adjusted according to the above table.

      NOTE: Replace the nut with a new one when replacing the bolt.
    11. Replace 1 bolt at a time when replacing 2 bolts.
      Fig 12: Identifying Bolt Specification
      G05540066Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
About FixVault