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Home >> Mazda >> 2011 >> 3 Mazdaspeed, 2.3 4 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System [L3 With TC] >> Engine Coolant Temperature (ECT) Sensor Inspection >> ECT Sensor No. 2 Inspection

ECT Sensor No. 2 Inspection

  1. Remove the battery cover. (See BATTERY REMOVAL/INSTALLATION [L3 WITH TC] ).
  2. Disconnect the negative battery cable.
  3. Drain the engine coolant. (See COOLING SYSTEM SERVICE WARNINGS ).
  4. Disconnect the ECT sensor No. 2 connector.
  5. Remove the ECT sensor No. 2. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION ).
  6. Place the ECT sensor No. 2 in water with a thermometer, and heat the water gradually.
  7. Measure the resistance between the ECT sensor No. 2 terminals A and B using an ohmmeter.
    ECT SENSOR NO. 2 SPECIFICATION

    ECT (°C {°F}) Resistance (kilohms)
    20{68} Approx. 2.45
    80{176} Approx. 0.318
    Fig 1: Identifying ECT Sensor No. 2 Connector Terminals
    G07868466Courtesy of MAZDA MOTORS CORP.
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