Front Upper Suspension Arm: Inspection

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

INSPECT FRONT UPPER SUSPENSION ARM
1. Flip the ball joint stud back and forth 5 times as shown in the illustration before installing the nut
  
  Fig 1: Inspecting Front Upper Suspension Arm
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Use a torque wrench to turn the nut continuously at a rate of 2 to 4 seconds per turn Take the torque reading on the 5th turn
  Turning torque:
  
  1.0 to 3.4 N*m (10 to 35 kgf*cm, 9 to 30 in.*lbf)
  
  If the value is not within the specified range, replace the front upper suspension arm with a new one
3. Check the dust boots for cracks or grease leakage.