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Home >> Mazda >> 2017 >> CX-9 Signature >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Coolant Temperature (ECT) Sensor Removal/Installation >> ECT Sensor No. 1
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ECT Sensor No. 1

  1. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  2. Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
  3. Remove the following parts:
    1. Plug hole plate (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
    2. Battery (See BATTERY REMOVAL/INSTALLATION .)
    3. Air inlet pipe (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
  4. Disconnect the ECT sensor No. 1 connector.
  5. Remove the ECT sensor No. 1 using the SST.
    Fig 1: Removing ECT Sensor No. 1 Using SST
    G11436086Courtesy of MAZDA MOTORS CORP.
  6. Install in the reverse order of removal.
  7. Refill the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
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