Section 10 (Engine Cooling System (2TR-FE)): Fan: Inspection

WARNING: This page is about a different car, the 2007 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FLUID COUPLING ASSY
1. Check the fluid coupling for damage and silicon oil leakage.
  If necessary, replace the fluid coupling.
  
  Fig 1: Inspecting Fluid Coupling Assy
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002