Front Wheel Alignment (For Hatchback) Adjustment

Suspension. Yaris. Ncp93, 131
Alignment Handling Diagnosis. Yaris. Ncp93, 131

  1. INSPECT TIRES

  2. MEASURE VEHICLE HEIGHT

  3. INSPECT WHEEL TURNING ANGLE

  4. INSPECT CAMBER, CASTER AND STEERING AXIS INCLINATION

  5. ADJUST CAMBER

  6. INSPECT TOE-IN

  7. ADJUST TOE-IN

  8. FRONT WHEELS FACING STRAIGHT AHEAD

  9. PERFORM YAW RATE SENSOR ZERO POINT CALIBRATION

Front Wheel Alignment (For Hatchback) -- Adjustment


NOTICE:
For vehicles equipped with VSC, if 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:
  1. Perform zero point calibration of the yaw rate and acceleration sensor and test mode inspection (YARIS_NCP93 RM000000XHR078X.html).


1. INSPECT TIRES
  1. Check the tires for wear and proper inflation pressure.

    Cold Tire Inflation Pressure
    Tire Size
    Front
    kPa (kgf/cm2, psi)
    Rear
    kPa (kgf/cm2, psi)
    P175/65R15 84H
    230 (2.3, 33)
    230 (2.3, 33)
    P195/50R16 83V
    220 (2.2, 32)
    200 (2.0, 29)
    175/65R14 82T
    220 (2.2, 32)
    220 (2.2, 32)
    185/60R15 84H
    220 (2.2, 32)
    220 (2.2, 32)


    Yaris. Ncp93, 131
  1. Using a dial indicator, check the tire runout.

    Tire runout:
    1.4 mm (0.0551 in.) or less (Vertical)
    2.0 mm (0.0787 in.) or less (Lateral)


2. MEASURE VEHICLE HEIGHT


Yaris. Ncp93, 131.Alignment Handling Diagnosis.Front Wheel Alignment (For Sedan).Front Wheel Alignment (For Hatchback)  Adjustment

Vehicle Height (Unloaded Vehicle)
Tire Size
Front A-B
Rear C-D
P175/65 R15
97 mm
(3.82 in.)
32 mm
(1.26 in.)
P195/50 R16
101 mm
(3.98 in.)
32 mm
(1.26 in.)
175/65 R14
69 mm
(2.72 in.)
4.0 mm
(0.16 in.)
185/60 R15
69 mm
(2.72 in.)
4.0 mm
(0.16 in.)
Measuring points:
A:
Ground clearance of front wheel center
B:
Ground clearance of front lower arm set front bolt center
C:
Ground clearance of rear wheel center
D:
Ground clearance of axle beam set bolt center
NOTICE:
  1. Before inspecting the wheel alignment, check the vehicle height.
  2. 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.
HINT:
Bounce the vehicle up and down at the corners to stabilize the suspension before inspecting the vehicle height.


3. INSPECT WHEEL TURNING ANGLE


Yaris. Ncp93, 131.Alignment Handling Diagnosis.Front Wheel Alignment (For Sedan).Front Wheel Alignment (For Hatchback)  Adjustment
  1. Fully turn the steering wheel left and right, and measure the wheel turning angle.

    Text in Illustration
    *a
    Inside
    *b
    Outside
    Yaris. Ncp93, 131
    Front of the Vehicle

    Wheel Turning Angle (Unloaded Vehicle)
    Tire Size
    Inside Wheel
    Outside Wheel
    P175/65 R15
    40°44 ' +/- 2°
    (40.73° +/- 2°)
    35°03'
    (35.05°)
    P195/50 R16
    32°26' +/- 2°
    (32.43° +/- 2°)
    29°26'
    (35.43°)
    175/65 R14
    41°33' +/- 2°
    (41.55° +/- 2°)
    35°40'
    (35.67°)
    185/60 R15
    41°33' +/- 2°
    (41.55° +/- 2°)
    35°40'
    (35.67°)
    If the right and left inside wheel angles are not within the specified range, check the right and left rack end lengths.


4. INSPECT CAMBER, CASTER AND STEERING AXIS INCLINATION


Yaris. Ncp93, 131.Alignment Handling Diagnosis.Front Wheel Alignment (For Sedan).Front Wheel Alignment (For Hatchback)  Adjustment
  1. Put the front wheel on the center of the alignment tester.

    Text in Illustration
    *1
    Alignment tester
    *2
    Camber-caster-steering axis inclination gauge
  1. Remove the wheel cap.

  1. Set the camber-caster-steering axis inclination gauge at the center of the axle hub or drive shaft.

  1. Inspect the camber, caster and steering axis inclination.

    Camber Inclination (Unloaded Vehicle)
    Tire Size
    Camber
    P175/65 R15
    -0°21' +/- 45'
    (-0.35° +/- 0.75°)
    P195/50 R16
    -0°24' +/- 45'
    (-0.40° +/- 0.75°)
    175/65 R14
    0°00' +/- 45'
    (0.00° +/- 0.75°)
    185/60 R15
    0°00' +/- 45'
    (0.00° +/- 0.75°)

    Caster Inclination (Unloaded Vehicle)
    Tire Size
    Transmission
    Caster
    P175/65 R15
    C50
    U340E
    4°59' +/- 45'
    (4.98° +/- 0.75°)
    P195/50 R16
    C50
    U340E
    5°00' +/- 45'
    (5.00° +/- 0.75°)
    175/65 R14
    C50
    4°31' +/- 45'
    (4.52° +/- 0.75°)
    U340E
    4°30' +/- 45'
    (4.50° +/- 0.75°)
    185/60 R15
    C50
    4°32' +/- 45'
    (4.53° +/- 0.75°)
    U340E
    4°31' +/- 45'
    (4.52° +/- 0.75°)

    Steering Axis Inclination (Unloaded Vehicle)
    Tire Size
    Steering Axis Inclination
    (Reference)
    P175/65 R15
    11°21'
    (11.35°)
    P195/50 R16
    11°26'
    (11.43°)
    175/65 R14
    10°43'
    (10.72°)
    185/60 R15
    10°43'
    (10.72°)
    NOTICE:
    1. Perform the inspection while the vehicle is empty (without a spare tire or tools on board).
    2. The tolerance for the difference between the left and right wheels is 30' (0.5°) or less for both the camber and caster.
  1. Remove the camber-caster-steering axis inclination gauge and attachment.

  1. 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.



5. ADJUST CAMBER
NOTICE:
Inspect the toe-in after the camber has been adjusted.
  1. Remove the front wheel.



  1. w/ ABS:



      Yaris. Ncp93, 131
    1. Remove the bolt and separate the speed sensor and flexible hose.



    Yaris. Ncp93, 131
  1. Remove the 2 nuts from the lower side of the shock absorber.

    HINT:
    Keep the bolt from rotating while loosening and removing the nuts.
  1. Clean the installation surfaces of the shock absorber and steering knuckle.

  1. Provisionally install the 2 nuts (Step A).



    Yaris. Ncp93, 131.Alignment Handling Diagnosis.Front Wheel Alignment (For Sedan).Front Wheel Alignment (For Hatchback)  Adjustment
  1. Fully push or pull the axle hub in the direction of the required adjustment (Step B).



    Yaris. Ncp93, 131
  1. Tighten the 2 nuts.

    Torque:
    164 N*m{1672 kgf*cm, 121 ft.*lbf}
    HINT:
    Keep the bolt from rotating while loosening and removing the nuts.


  1. w/ ABS:



      Yaris. Ncp93, 131
    1. Install the flexible hose and speed sensor with the bolt.

      Torque:
      29 N*m{300 kgf*cm, 22 ft.*lbf}
      NOTICE:
      Install the flexible hose and speed sensor without twisting them.
  1. Install the front wheel.

    Torque:
    103 N*m{1050 kgf*cm, 76 ft.*lbf}


    Yaris. Ncp93, 131.Alignment Handling Diagnosis.Front Wheel Alignment (For Sedan).Front Wheel Alignment (For Hatchback)  Adjustment
  1. Check the camber.
    If the measured value is not within the specifications, 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.
    Move axle toward (+) in step (B)
    Refer to table (1) (Move axle toward positive side)
    Move axle toward (-) in step (B)
    Refer to table (2) (Move axle toward negative side)


  1. Table (1) (Move the axle toward the positive side)


    Yaris. Ncp93, 131.Alignment Handling Diagnosis.Front Wheel Alignment (For Sedan).Front Wheel Alignment (For Hatchback)  Adjustment



  1. Table (2) (Move the axle toward the negative side).


    Yaris. Ncp93, 131.Alignment Handling Diagnosis.Front Wheel Alignment (For Sedan).Front Wheel Alignment (For Hatchback)  Adjustment

    The body and suspension may be damaged if the camber is not correctly adjusted in accordance with the above table.
    NOTICE:
    Replace the nut with a new one when replacing the bolt.
  1. 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.


6. INSPECT TOE-IN
  1. Bounce the vehicle up and down at the corners to stabilize the suspension.

  1. Release the parking brake and move the shift lever to the neutral position.

  1. Push the vehicle straight ahead approximately 5 m (16.4 ft.). (Step A)



    Yaris. Ncp93, 131.Alignment Handling Diagnosis.Front Wheel Alignment (For Sedan).Front Wheel Alignment (For Hatchback)  Adjustment
  1. Put tread center marks on the rearmost points of the front wheels and measure the distance between the marks (Dimension B).

    Text in Illustration
    *a
    Tread Center Mark
  1. Slowly push the vehicle straight ahead to cause the front wheels to rotate 180° using the front tire valve as a reference point.

    HINT:
    Do not allow the wheels to rotate more than 180°. If the wheels rotate more than 180°, perform the procedure from (Step A) again.


    Yaris. Ncp93, 131.Alignment Handling Diagnosis.Front Wheel Alignment (For Sedan).Front Wheel Alignment (For Hatchback)  Adjustment
  1. Measure the distance between the tread center marks on the front side of the wheels (Dimension A).

    Text in Illustration
    Yaris. Ncp93, 131
    Front of the Vehicle

    Toe-in (Unloaded Vehicle)
    Tire Size
    Specified Condition
    P175/65 R15
    B-A: 1.2 +/- 2.0 mm
    (0.0472 +/- 0.0787 in.)
    P195/50 R16
    B-A: 0.9 +/- 2.0 mm
    (0.0354 +/- 0.0787 in.)
    175/65 R14
    B-A: 1.2 +/- 2.0 mm
    (0.0472 +/- 0.0787 in.)
    185/60 R15
    B-A: 1.3 +/- 2.0 mm
    (0.0512 +/- 0.0787 in.)
    If the toe-in is not within the specified value, adjust it at the rack ends.


7. ADJUST TOE-IN


Yaris. Ncp93, 131
  1. Measure the thread lengths of the right and left rack ends.

    Standard:
    Difference in thread length of 1.5 mm (0.0591 in.) or less
  1. Remove the rack boot set clips.

  1. Loosen the tie rod end lock nuts.

  1. 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.

  1. 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.
  1. Make sure that the lengths of the right and left rack ends are the same.

    Toe-in (Unloaded Vehicle)
    Tire Size
    Specified Condition
    P175/65 R15
    B-A: 1.2 +/- 1.0 mm
    (0.0472 +/- 0.0394 in.)
    P195/50 R16
    B-A: 0.9 +/- 1.0 mm
    (0.0354 +/- 0.0394 in.)
    175/65 R14
    B-A: 1.2 +/- 1.0 mm
    (0.0472 +/- 0.0394 in.)
    185/60 R15
    B-A: 1.3 +/- 1.0 mm
    (0.0512 +/- 0.0394 in.)
  1. Tighten the tie rod end lock nuts to the specified torque.

    Torque:
    75 N*m{760 kgf*cm, 55 ft.*lbf}
    NOTICE:
    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 flat of the tie rod end and tighten the lock nut.
  1. Place the boots on the seats.



    Yaris. Ncp93, 131.Alignment Handling Diagnosis.Front Wheel Alignment (For Sedan).Front Wheel Alignment (For Hatchback)  Adjustment
  1. Using pliers, install the RH and LH boot clips as shown in the illustration.

    Text in Illustration
    *a
    Upper Side
    *b
    Front Side
    *c
    180° (Clip installation range)
    NOTICE:
    1. Install the clip so that its claws are within the clip installation range.
    2. Make sure that the rack boots are not twisted.


8. FRONT WHEELS FACING STRAIGHT AHEAD


9. PERFORM YAW RATE SENSOR ZERO POINT CALIBRATION
(YARIS_NCP93 RM000000XHR078X.html)