Coolant THERMOSENSOR
WARNING: This page is about a different car, the 1988 Subaru RX, 1988 Subaru GL-10, 1988 Subaru GL, and 1988 Subaru DL. However, it is still accessible from the selected car via links, so may be relevant.
The coolant thermosensor is located on thermocasing of intake manifold. Thermistor changes resistance with temperature change. A coolant temperature signal converted into resistance is transmitted to control unit to control amount of fuel injection, ignition timing, purge control solenoid valve, etc.