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Home >> Lexus >> 2021 >> LS 500 Base, AWD >> Repair and Diagnosis >> Suspension >> Wheel Alignment >> Wheel Alignment - Service Information >> Rear Wheel Alignment >> Adjustment [09/2018 - 10/2020] >> Procedure

Adjustment [09/2018 - 10/2020]: Procedure

  1. INSPECT TIRES 

    Refer to INSPECTION [12/2017 - 10/2020]

  2. ADJUST STANDARD VEHICLE HEIGHT (w/ Air Suspension) 

    See step  2

  3. INSPECT VEHICLE HEIGHT 
    • for 2WD:

      See step  3

    • for AWD:

      See step  3

  4. INSPECT CAMBER 
    1. w/ Air suspension:

      Camber (Unloaded Vehicle)

      Item Camber Inclination Right-left Difference
      for 2WD w/ Dynamic Rear Steering -1°25' +/-45' (-1.42° +/-0.75°) 0°30' (0.50°) or less
      w/o Dynamic Rear Steering -1°25' +/-45' (-1.42° +/-0.75°) 0°30' (0.50°) or less
      for AWD - -1°14' +/-45' (-1.23° +/-0.75°) 0°30' (0.50°) or less
    2. w/o Air suspension:

      Camber (Unloaded Vehicle)

      Item Camber Inclination Right-left Difference
      for 2WD w/ AVS -1°06' +/-45' (-1.10° +/-0.75°) 0°30' (0.50°) or less
      w/o AVS -0°58' +/-45' (-0.97° +/-0.75°) 0°30' (0.50°) or less
      for AWD - -0°55' +/-45' (-0.92° +/-0.75°) 0°30' (0.50°) or less
  5. INSPECT TOE-IN 
    1. Bounce the vehicle up and down at the corners to stabilize the suspension.
    2. Release the parking brake and move the shift lever to N.
    3. Push the vehicle straight ahead approximately 5 m (16.4 ft.). (Step A)
    4. Put tread center marks on the rearmost points of the rear wheels and measure the distance between the marks (dimension B).
      GTY425632Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Tread Center Mark
      *b Dimension B
      Front of the Vehicle
    5. Slowly push the vehicle straight ahead to cause the rear wheels to rotate 180°. Use the rear 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.

    6. Measure the distance between the tread center marks on the front of the rear wheels (dimension A).
      GTY427701Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Dimension A
      Front of the Vehicle

      Toe-in (Unloaded Vehicle)

      Item Vehicle Specification Specified Condition
      w/o Dynamic Rear Steering Tire Size: 245/50RF19 C + D: 0°14' +/- 0°09' (0.23° +/- 0.15°)
      B - A: 3 +/- 2 mm (0.118 +/- 0.079 in.)
      Tire Size: 245/45RF20 C + D: 0°14' +/- 0°09' (0.23° +/- 0.15°)
      B - A: 3 +/- 2 mm (0.118 +/- 0.079 in.)
      Tire Size: 275/40RF20 C + D: 0°14' +/- 0°09' (0.23° +/- 0.15°)
      B - A: 3 +/- 2 mm (0.118 +/- 0.079 in.)
      w/ Dynamic Rear Steering Tire Size: 275/40RF20 for Korea C + D: 0° +/- 0°09' (0° +/- 0.15°)
      B - A: 0 +/- 2 mm (0 +/- 0.079 in.)
      except Korea C + D: 0°14' +/- 0°09' (0.23° +/- 0.15°)
      B - A: 3 +/- 2 mm (0.118 +/- 0.079 in.)

      HINT: 

      Measure "B - A" only when "C + D" cannot be measured.

  6. ADJUST TOE-IN (w/o Dynamic Rear Steering) 
    1. Loosen the nut of the toe control link sub-assembly (on the rear suspension member sub-assembly side).
      NOTE:

      Hold the toe adjust cam sub-assembly while rotating the nut.

      GTY815758Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Rotate the toe adjust cam sub-assembly to adjust the toe-in.
      GTY815757Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Tighten the nut of the toe control link sub-assembly (on the rear suspension member sub-assembly side).

      Torque: 78 N.m (795 kgf/cm, 58 ft.lbf) 

      NOTE:

      Hold the toe adjust cam sub-assembly while rotating the nut.

  7. ADJUST TOE-IN (w/ Dynamic Rear Steering) 
    NOTE:

    If any underbody rear suspension parts are removed and installed, replaced or adjusted, the steering wheel may become off center.

    Therefore, perform neutral point memorization and motor rotation angle sensor calibration.

    1. Make sure that the thread length of the right and left steering rack ends are approximately the same.
      GTY802034Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Steering Rack Boot Clip
      *2 Lock Nut

      Standard Difference

      1.5 mm (0.059 in.) or less

    2. Remove the steering rack boot clips.
    3. Loosen the tie rod assembly lock nuts.
    4. Turn the right and left steering rack ends by an equal amount to adjust the toe-in.
    5. Make sure that the thread length of the right and left steering rack ends are the same.
    6. Using SST, tighten the tie rod assembly lock nuts.
      • SST: 09612-24014 
        1. 09617-24011
      NOTE:

      Temporarily 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.

      Specified tightening torque 

      Torque: 55 N.m (561 kgf/cm, 41 ft.lbf) 

      HINT: 

      • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

        Refer to PRECAUTION [12/2017 - 10/2020]

      • When using SST (fulcrum length of 51 mm (2.008 in.)) + torque wrench (fulcrum length of 255 mm (10.039 in.)): 45.8 N.m (467 kgf/cm, 34 ft.lbf)
      GTY1235141Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Torque Wrench Fulcrum Length
    7. Place the steering rack boots on the seats and install the steering rack boot clips.

      HINT: 

      • Make sure that the steering rack boots are not twisted.
      • Make sure that the steering rack boot clips are facing towards the front of the vehicle.
    8. Perform the dynamic rear steering system calibration.

      Refer to CALIBRATION [12/2017 - 10/2023]

  8. INSPECT REAR SUSPENSION 
    1. Inspect the rear suspension member sub-assembly.

      Standard

      Length A 

      629.5 mm (2.06 ft.)

      Length B 

      582.7 mm (1.91 ft.)

      GTY807776Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect the lower control arm assembly.

      Standard

      357.2 mm (1.17 ft.)

      GTY815740Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Inspect the rear No. 2 suspension arm assembly.

      Standard

      422.2 mm (1.38 ft.)

      GTY815739Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Inspect the rear No. 1 suspension arm assembly.

      Standard

      206.0 mm (8.1102 in.)

      GTY815738Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Inspect the rear upper control arm assembly.

      Standard

      324.5 mm (1.06 ft.)

      GTY815737Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. w/o Dynamic Rear Steering: Inspect the toe control link.

      Standard

      481.0 mm (1.58 ft.)

      GTY836193Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. REPLACE REAR SUSPENSION ARM ATTACHMENT SUB-ASSEMBLY 
    1. When rear suspension member is not replaced:
      GTY776050Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Toe Adjust Plate
      *2 Rear Suspension Attachment
      *a Stamping Position
      *b Dimension A
      1. Use the same stamping No. as the parts that were removed from the left and right side of the vehicle.
    2. When rear suspension member is replaced:
      1. Use stamping A for the parts that were removed from the left and right side of the vehicle.

        Part No. information

        Stamping No. Part No.
        Rear Suspension Attachment        		 Part No.
        Toe Adjust Plate        		 Dimension A
        A 48709-11020 48452-11010 30 mm (1.181 in.)
        B 48709-11030 48452-11020 28 mm (1.102 in.)
        C 48709-11040 48452-11030 32 mm (1.260 in.)
  10. CHECK VEHICLE HEIGHT CONTROL (w/ Air Suspension) 
    1. Check the vehicle height control operation.

      Refer to OPERATION CHECK [12/2017 - ]

    2. After the inspection is completed, return the settings to the recorded values.
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