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Home >> Mazda >> 2024 >> 3 S >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (VIN Y) >> Engine Coolant Temperature (ECT) Sensor Inspection >> ECT Sensor No. 1 >> Function inspection
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Function inspection

  1. Connect the M-MDS to the DLC-2.
  2. Switch the ignition ON (engine off).
  3. Display the PCM PID [ECT_VOLT] and [ECT]. (Refer to [PID/DATA MONITOR INSPECTION ] in the troubleshooting information.) (Refer to [PID/DATA MONITOR TABLE [PCM (SKYACTIV-G 2.5T)] ] in the troubleshooting information.)
  4. Compare the voltage indications for PCM PID [ECT_VOLT and the temperature indications for PID [ECT] with the standards in the table indicated below.
    • If they do not match the standard, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .)
    • If they match the standard, perform the resistance inspection. (See RESISTANCE INSPECTION .)
      ENGINE COOLANT TEMPERATURE SENSOR SPECIFICATIONS (STANDARD)

      ECT_VOLT ECT
      V °C {°F}
      Approx. 3.10 20 {68}
      Approx. 2.16 40 {104}
      Approx. 1.40 60 {140}
      Approx. 0.87 80 {176}
      Approx. 0.54 100 {212}
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