Toyota Matrix 2003-06

Testing

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  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Drain and recycle the engine coolant.
  4.  
  5. Remove the coolant temperature sensor.
  6.  
  7. Place the sensor in a container of water with a temperature approximately 20 degrees C (68 F).
  8.  
  9. Using an ohmmeter, check resistance between the terminals. The resistance should be 2.32-2.59 Kohms.
  10.  
  11. Raise the temperature of the container of water to approximately 80 degrees C (176F).
  12.  
  13. Using an ohmmeter, check resistance between the terminals. The resistance should be 0.310-0.326 Kohms.
  14.  

1ZZ-FE VIN R



  1. Drain engine coolant.
  2.  
  3. Disconnect the ECT sensor connector.
  4.  
  5. Using a 19 mm deep socket wrench, remove the ECT sensor and gasket.
  6.  
  7. Using an ohmmeter, measure the resistance between terminals 1 and 2.
  8.  
  9. If the resistance is not as specified, replace the ECT sensor.

    Click image to see an enlarged view

    Fig. ECT testing

    ECT testing
  10.  

To install:

  1. Install a new gasket to the ECT sensor.
  2.  
  3. Using a 19 mm deep socket, install the ECT sensor. Tighten to 14 ft. lbs. (20 Nm).
  4.  
  5. Connect the ECT sensor connector.
  6.  
  7. Refill with engine coolant.
  8.  

2ZZ-FE VIN Y



  1. Drain engine coolant.
  2.  
  3. Disconnect the ECT sensor connector.
  4.  
  5. Using a 19 mm deep socket wrench, remove the ECT sensor and gasket.
  6.  
  7. Using an ohmmeter, measure the resistance between terminals 1 and 2.
  8.  
  9. If the resistance is not as specified, replace the ECT sensor.

    Click image to see an enlarged view

    Fig. ECT testing

    ECT testing
  10.  

To install:

  1. Install a new gasket to the ECT sensor.
  2.  
  3. Using a 19 mm deep socket, install the ECT sensor. Tighten to 14 ft. lbs. (20 Nm).
  4.  
  5. Connect the ECT sensor connector.
  6.  
  7. Refill with engine coolant.
  8.  

 
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