PL720 2WD L4-1952cc 2.0L SOHC (Z20) (1985)
Coolant Temperature Sensor/Switch (For Computer): Description and Operation
Water temperature sensor graph.
A water temperature sensor, threaded into the intake manifold water jacket, monitors changes in water temperature and transmits a corresponding
signal to the ECC control unit. The sensor houses a thermistor whose resistance decreases in response to a rise in temperature.