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Home >> Saab >> 2001 >> 9-3 Base, 4D Hatchback, 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. See COMPONENT LOCATIONS  . Measure voltage between sensor terminals. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE  table. 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  table. 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