On-Vehicle 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 STEERING WHEEL FREE PLAY
1. Stop the vehicle and position the front wheels straight ahead.
2. Gently turn the steering wheel right and left, and check steering wheel free play
  Maximum free play:
  
  30 mm (1.18 in.)
  
  HINT
  
  If the free play exceeds the maximum, check the steering system (See STEERING SYSTEM )
  
  Fig 1: Identifying Steering Wheel Free Play
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002