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Home >> Mazda >> 2004 >> 3 i, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System >> Engine Coolant Temperature (ECT) Sensor Inspection >> Resistance Inspection

Resistance Inspection

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NOTE:
  • Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart.
  1. Disconnect the ECT sensor connector.
  2. Remove the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION .)
  3. Place the ECT sensor in the water and while increasing the water temperature, measure the resistance between ECT sensor terminals A and B.
    • If the monitor item status/specification (reference) is not within the specification, even though the ECT sensor resistance is within the specification, perform the Circuit Open/Short Inspection .
    • If not within the specification, replace the ECT sensor.
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