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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 

    Remove the nut and 3 bolts, and disconnect the throttle body from the intake manifold.

  5. REMOVE ECT SENSOR 
    Fig 1: Removing ECT Sensor
    G02650660Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the ECT sensor connector.
    2. Remove the ECT sensor and gasket.
  6. INSPECT ECT SENSOR 
    Fig 2: Inspecting ECT Sensor
    G02650661Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Using an ohmmeter, measure the resistance between the terminals.

    Resistance: Refer to the graph 

    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: 20 N.m (204 kgf.cm, 15 ft.lbf) 

  9. REINSTALL INTAKE AIR CONNECTOR 
  10. REFILL WITH ENGINE COOLANT (See  REPLACEMENT  ) 
  11. REINSTALL THROTTLE BODY COVER 
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