Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Mazda >> 2012 >> 3 Mazdaspeed, 2.3L Eng VIN 4 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System [MZR 2.3 DISI Turbo] >> Engine Coolant Temperature (ECT) Sensor Inspection >> ECT Sensor No.2 >> Resistance Inspection

Resistance Inspection

WARNING:
  • When the engine is hot, it can badly burn. Turn off the engine and wait until it is cool before removing the ECT sensor.
  1. Remove the battery cover. (See BATTERY REMOVAL/INSTALLATION [MZR 2.3 DISI TURBO] .)
  2. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 2.3 DISI TURBO] .)
  3. Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
  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 ECT sensor No.2 terminals A and B.
    Fig 1: Identifying ECT Sensor No.2 Terminals
    G08155454
    SPECIFICATION

    ECT (°C {°F}) Resistance (kilohms)
    20 {68} Approx. 2.45
    80 {176} Approx. 0.318
scientia non olet · About Mike's Workshop Manuals