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Home >> Mazda >> 2024 >> 3 S >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (VIN M) >> Engine Coolant Temperature (ECT) Sensor Inspection >> With EGR Cooler >> Resistance Inspection
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Resistance Inspection

  1. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  2. Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT [SKYACTIV-G (WITH CYLINDER DEACTIVATION)] .)
  3. Remove the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION)] .)
  4. Place the ECT sensor in water with a thermometer, and heat the water gradually.
    G15654585Courtesy of MAZDA MOTORS CORP.
  5. Measure the resistance between ECT sensor terminals A and B.