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Engine Coolant Temperature (ECT) Sensor: Inspection

  1. DRAIN ENGINE COOLANT 
  2. REMOVE V-BANK COVER 
  3. REMOVE ENGINE COOLANT TEMPERATURE SENSOR 
    1. Disconnect the engine coolant temperature sensor connector.
    2. Remove the engine coolant temperature sensor and gasket from the water by- pass joint.
  4. INSPECT ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE 

    Using an ohmmeter, measure the resistance between terminals.

    Resistance: 

    2.32 to 2.59 kΩ at 20°C (68°F) 

    0.310 to 0.326 kΩ at 80°C (176°F) 

    NOTE: When inspecting the water temperature sensor in water, prevent water flow into the terminals. After inspection, wipe the water off from the sensor. 
  5. INSTALL ENGINE COOLANT TEMPERATURE SENSOR 
    1. Install a new gasket and engine coolant temperature sensor to the water by- pass joint.

      Torque: 20 N.m (204 kgf.cm, 15 ft.lbf) 

    2. Connect the engine coolant temperature connector.
  6. ADD ENGINE COOLANT 
  7. CHECK FOR COOLANT LEAKS 
    Fig 1: Measuring Resistance Between Engine Coolant Temperature Sensor Terminals
    G02636182Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. INSTALL V-BANK COVER 
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