Coolant Temperature Sensor/Switch (For Computer)

ECT Sensor Temperature To Resistance Values:

ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE VALUES
Refer to the chart in the accompanying image for sensor temperature to resistance values.

ECM PINOUT VOLTAGE VALUES
Voltage at Engine Control Module (ECM) pin A15 (LT GRN/BLK wire) varies according to engine coolant temperature:

Low Temperature: Approximately 5 volts
Normal Operating Temperature: 1.5 - 2 volts
High Temperature: Approximately 0.5 volt