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Home >> Mazda >> 2014 >> 5 Touring >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Coolant Temperature (ECT) Sensor Inspection
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Engine Coolant Temperature (ECT) Sensor Inspection

  1. Remove the battery cover. (See BATTERY REMOVAL/INSTALLATION .)
  2. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION .)
  3. Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
  4. Disconnect the ECT sensor connector.
  5. Remove the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION .)
  6. Place the ECT sensor in water with a thermometer, and heat the water gradually.
  7. Measure the resistance between ECT sensor terminals A and B.
    Fig 1: Identifying ECT Sensor Connector Terminals A And B
    G08150328Courtesy of MAZDA MOTORS CORP.
    ECT SENSOR SPECIFICATION

    ECT (°C {°F}) Resistance (kilohms)
    20 {68} 35.48-39.20
    80 {176} 3.65-4.02
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