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Home >> Toyota >> 2004 >> Sequoia Limited, RWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> SFI System >> Engine Coolant Temperature (ECT) Sensor >> Inspection

Engine Coolant Temperature (ECT) Sensor: Inspection

  1. DRAIN ENGINE COOLANT 
  2. REMOVE THROTTLE BODY COVER 
  3. REMOVE INTAKE AIR CONNECTOR 
  4. DISCONNECT THROTTLE BODY FROM INTAKE MANIFOLDS 
    1. Remove the 2 bolts and 2 nuts, and disconnect the throttle body from the intake manifold.
    2. Remove the gasket.
  5. REMOVE ECT SENSOR 
    1. Disconnect the ECT sensor connector.
    2. Remove the ECT sensor and gasket.
    Fig 1: Removing ECT Sensor
    G04207898Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT ECT SENSOR 

    Using an ohmmeter, measure the resistance between the terminals.

    Resistance: See (  Fig 2 

    If the resistance is not as specified, replace the ECT sensor.

  7. REINSTALL ECT SENSOR 
    1. Install a new gasket and the ECT sensor.

      Torque: 19.6 N.m (200 kgf.cm, 14 ft.lbf) 

    2. Connect the ECT sensor connector.
  8. REINSTALL THROTTLE BODY TO INTAKE MANIFOLDS 

    Install a new gasket and the throttle body with the 2 bolts and 2 nuts.

    Torque: 18 N.m (185 kgf.cm, 13 ft.lbf) 

  9. REINSTALL INTAKE AIR CONNECTOR 
  10. REFILL WITH ENGINE COOLANT (See  REPLACEMENT  ) 
  11. REINSTALL THROTTLE BODY COVER 
    Fig 2: Inspecting ECT Sensor
    G04207899Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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