Civic Hatchback L4-1493cc 1.5L SOHC (D15B1) TBI (1990)
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Coolant Temperature Sensor/Switch (For Computer): Description and Operation
Fig. 34 Coolant Temperature (TW) Sensor And Characteristics Chart
The coolant temperature (TW) sensor, located in the cylinder head just below the distributor, is a temperature sensitive resistor (thermistor). The
resistance of the thermistor decreases as the coolant temperature increases. Engine temperature is used by the ECU to determine ignition timing,
fuel injector duration, purge control, idle speed, and EGR activation.
