Engine Coolant Temperature (ECT) Sensor Removal and Installation: Removal
WARNING: This page is about a different car, the 2006 Suzuki XL-7. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect negative cable from battery.
Drain cooling system.
Disconnect coupler from ECT sensor (1).
Remove ECT sensor from water outlet cap (2).
Fig 1: Identifying ECT Sensor And Water Outlet Cap