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Home >> Saab >> 2002 >> 9-3 SE, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Engine Sensors & Switches >> Engine Coolant Temperature (ECT) Sensor

Engine Coolant Temperature (ECT) Sensor

  1. Backprobing ECT sensor, turn ignition on. Measure voltage between sensor terminals. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE . Replace sensor if voltage is not as specified.
  2. Turn ignition off. Disconnect ECT sensor connector. Measure resistance between sensor terminals. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE . Replace sensor if resistance is not as specified.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE

Temperature - °F (°C) Volts Ohms
-22 (-30) 4.8 20,000-30,000
-14 (-10) 4.5 7000-11,400
68 (20) 3.6 2100-2900
104 (40) 2.7 1000-1300
140 (60) 1.9 565-670
176 (80) 1.2 295-365
194 (90) 1.0 240-260
230 (110) 0.65 140-160