2002 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Section 355 (Active Height Control System): Adjustment

WARNING: This page is about a different car, the 2004 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. ADJUST HEIGHT CONTROL SENSOR (IN CASE OF USING LEXUS HAND-HELD TESTER) 
    1. Connect the LEXUS hand-held tester to DLC3 on the vehicle.
    2. Start the engine and push the height control select switch to adjust the vehicle height to the "LO" then to "N" position.
      Fig 1: Connecting Lexus Hand-Held Tester To DLC3
      G00913271Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Inspect the vehicle height.

      Vehicle height 

      Fig 2: Inspecting Vehicle Height
      G00913272Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Measuring points:

      1. A: Ground clearance of spindle center
      2. B: Ground clearance of lower suspension arm front bolt center
      3. C: Ground clearance of rear axle shaft center
      4. D: Ground clearance of lower control arm front bolt center
    4. Inspect and adjust the height control sensor to the neutral position.
      Fig 3: Vehicle Height Table
      G00913273Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Read the value of height control sensor on the LEXUS hand-held tester.
        1. Standard value: Actual vehicle height +/- 5 mm (0.20 in.) 

      HINT:

      (Example)

      When the measurement value of the front vehicle height is 85.0 mm (3.35 in.), the actual value of height control sensor is -2.3 mm (-0.09 in.).

    5. Loosen the nut and adjust the positions of the height control sensor link and front upper suspension arm or rear lower control arm by moving the up and down to install them.
    6. Tighten the nut.
      1. Torque: 5.6 N.m (57 kgf.cm, 49 in.lbf) 
      Fig 4: Loosening Nut & Adjusting Positions
      G00913274Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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