Engine Coolant Temperature Sensor: Removal

Remove the collector cover.
Disconnect the ground cable from battery.

Fig 1: Disconnecting Battery Ground Cable
Courtesy of SUBARU OF AMERICA, INC.
Drain engine coolant. Refer to DRAINING OF ENGINE COOLANT , REPLACEMENT, Engine Coolant.
Disconnect the connectors from the engine coolant temperature sensor.

Fig 2: Locating Engine Coolant Temperature Sensor Connector
Courtesy of SUBARU OF AMERICA, INC.
Remove the engine coolant temperature sensor.