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Home >> Mazda >> 2019 >> CX-9 Touring, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Coolant Temperature (ECT) Sensor Inspection >> ECT sensor No. 2 (Until 2017MY and Except Mexico) >> Resistance Inspection
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Resistance Inspection

  1. Disconnect the negative battery terminal. (See REQUIRED PROCEDURE AFTER NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  2. Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
  3. Remove the ECT sensor No. 2. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION .)
  4. Place the ECT sensor No. 2 in water with a thermometer, and heat the water gradually.
    G11436083Courtesy of MAZDA MOTORS CORP.
  5. Measure the resistance between ECT sensor No. 2 terminals A and B.