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Home >> Mazda >> 2017 >> 6 Sport, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Coolant Temperature (ECT) Sensor Inspection >> ECT Sensor No. 1 >> Resistance inspection
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Resistance inspection

  1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
  2. Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
  3. Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
  4. Pull out the evaporative hose No. 1 from the catch tank and set it aside. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION .)
  5. Pull out the ventilation hose from the air hose and set it aside. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION .)
  6. Remove the clips and loosen the wiring harness. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION .)
  7. Disconnect the ECT sensor No. 1 connector.
  8. Remove the ECT sensor No. 1. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION .)
  9. Place the ECT sensor No. 1 in water with a thermometer, and heat the water gradually.
    Fig 1: Measuring Resistance Between ECT Sensor No. 1 Terminals A And B
    G09785523Courtesy of MAZDA MOTORS CORP.
  10. Measure the resistance between ECT sensor No. 1 terminals A and B.
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