Engine Coolant Temperature Sensor: Removal

CAUTION: The hybrid system uses high voltage circuits, so improper handling could cause an electric shock or leakage. During servicing (e.g. installing or removing the parts, replacing the parts), be sure to follow the procedures below.

REMOVE RADIATOR SUPPORT OPENING COVER (See REMOVAL )
REMOVE ENGINE UNDER COVER LH
REMOVE ENGINE UNDER COVER RH
DRAIN ENGINE COOLANT (See ON-VEHICLE INSPECTION )
DRAIN HV COOLANT (See ON-VEHICLE INSPECTION )
DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
REMOVE INVERTER WITH CONVERTER
1. Remove the inverter with converter (See REMOVAL ) .
REMOVE ENGINE COOLANT TEMPERATURE SENSOR
1. Disconnect the sensor connector.
2. Using a 19 mm deep socket wrench, remove the sensor and gasket.
  
  Fig 1: Locating Engine Coolant Temperature Sensor Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002