Engine Coolant Temperature Sensor: Removal

DRAIN ENGINE COOLANT (See appropriate step(s) under COOLANT ).
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 ENGINE COOLANT TEMPERATURE SENSOR
1. Disconnect the sensor connector.
2. Using SST, remove the sensor and gasket.
  SST 09817-33190
  
  Fig 1: Removing Engine Coolant Temperature Sensor
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002