D21 Hardbody 4WD V6-2960cc 3.0L SOHC MFI (VG30E) (1991)
Coolant Temperature Sensor/Switch (For Computer): Description and Operation
Engine Temperature Sensor
The engine temperature sensor uses a thermistor which changes in resistance according to the coolant temperature. As the temperature rises the
resistance of the sensor lowers. The ECU interprets the resistance value as engine temperature.