2003 Lexus GS 300FACTORY OEM SERVICE PROCEDURE

Front Wheel Alignment: Adjustment

WARNING: This page is about a different car, the 2003 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT TIRE (See  TIRE & WHEEL  ) 
  2. MEASURE VEHICLE HEIGHT 

    Vehicle height: 

    Fig 1: Vehicle Height Specification
    G01323414Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Measuring points: 

    A: Ground clearance of front wheel center 

    B: Ground clearance of lower suspension arm No. 2 set bolt center 

    C: Ground clearance of rear wheel center 

    D: Ground clearance of strut rod set bolt center 

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

    If the vehicle height is not the specified value, try to adjust it by pushing down on or lifting the body.

    Fig 2: Measuring Vehicle Height
    G01323415Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT TOE-IN 

    Toe-in: 

    Fig 3: Toe-In Specification
    G01323416Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the toe-in is not within the specified value, adjust it at the rack ends.

    Fig 4: Inspecting Toe-In
    G01323417Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. ADJUST TOE-IN 
    1. Remove the rack boot set clips.
    2. Loosen the tie rod end lock nuts.
    3. 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 value.

    4. Make sure that the lengths of the right and left rack ends are the same.
      5. Fig 5: Making Sure That Lengths Of Right And Left Rack Ends Are Same
      G01323418Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Torque the tie rod end lock nuts.

      Torque: 88 N.m (897 kgf.cm, 65 ft.lbf) 

    6. 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, and measure the turning angle.

      Wheel angle:

      Fig 6: Wheel Angle Specification
      G01323419Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the wheel angles differ from the standard of the specification, inspect the toe-in.

    Fig 7: Inspecting Wheel Angle
    G01323420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT CAMBER, CASTER AND STEERING AXIS INCLINATION 
    1. Install the camber-caster-kingpin gauge or position vehicle on a wheel alignment tester.
    2. Inspect the camber, the caster and the steering axis inclination.

    Camber, caster and steering axis inclination: 

    Fig 8: Camber, Caster And Steering Axis Inclination
    G01323421Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.