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 WATER PUMP
1. Visually check the air hole and drain hole for coolant leakage.
  If leakage is found, replace the water pump
  
  Fig 1: Identifying Air Hole And Drain Hole
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the pulley and check that the water pump bearing moves smoothly and quietly If necessary, replace the water pump
Fig 2: Turning Pulley
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002