Engine Coolant Temperature Sensor: Removal

Remove the collector cover.
1. Carefully pull up the rear of collector cover at two positions (A).
2. Carefully pull up the front of collector cover at two positions (B) while moving it forward.
  
  Fig 1: Removing Collector Cover
  Courtesy of SUBARU OF AMERICA, INC.
Disconnect the ground terminal from battery sensor. < Ref. to BATTERY , NOTE, Repair Contents. >
Drain engine coolant. < Ref. to DRAINING OF ENGINE COOLANT , REPLACEMENT, Engine Coolant. >
Disconnect the connector (A) from the engine coolant temperature sensor, and remove the engine coolant temperature sensor.

Fig 2: Locating Engine Coolant Temperature Sensor Connector
Courtesy of SUBARU OF AMERICA, INC.