Front Shock Absorber: Inspection

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FRONT PNEUMATIC SHOCK ABSORBER WITH CYLINDER ASSEMBLY LH
1. Extend the pneumatic cylinder with shock absorber and check that it is as described below
  OK: While extending the cylinder at a constant speed, the load is constant for each stroke and there is no abnormal feedback or noises. Also, the cylinder returns at a constant speed when extended.
  
  Fig 1: Inspecting Front Pneumatic Shock Absorber
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If an abnormality is found, replace the pneumatic cylinder with shock absorber with a new one.
  
  NOTE: When extending the front pneumatic cylinder with shock absorber LH, do not block the air inlet/outlet opening.
2. While adjusting the damping force control rod to hard, medium and soft, inspect the front pneumatic shock absorber with cylinder assembly LH by compressing and extending it.
  OK: There is a difference in the clamping force.