Mitsubishi Endeavor 2004-06

Testing

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  1. Drain the engine coolant
  2.  
  3. Remove the engine coolant temperature sensor
  4.  
  5. Immerse the unit in 70°C (158°F) water to measure the resistance and compare with the accompanying chart. Standard value:104 ± 13.5 ohms.

    Click image to see an enlarged view

    Fig. Immerse the unit in 70°C (158°F) water to measure the resistance



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    Fig. Engine coolant temperature sensor chart

  6.  
  7. If within the standard value, the sensor is OK. If not within the standard value, replace it.
  8.  

  1. Disconnect the sensor connector and measure at the harness side.
  2.  
  3. Turn the ignition switch to the "ON" position.
  4.  
  5. Measure the voltage between terminal 1 and ground. Voltage should be between 4.5 and 4.9 volts.
  6.  
  7. Turn the ignition switch to the "LOCK" (OFF) position.
  8.  
  9. Check for the resistance between terminal 2 and ground. Resistance should be less than 2 ohm.
  10.  
  11. If any check above does not meet the specifications, check connectors and wiring between the sensor and ECM/PCM. If ok, replace ECM/PCM.
  12.  
  13. If all checks above meet the specifications, measure the resistance between the sensor side connector terminals 1 and 2. There should be resistance (50-72 Kohms).
    NOTE
    Check that the circuit is not open circuit.

  14.  
  15. If no continuity, replace the sensor.
  16.  
  17. If sensor has continuity, remove the sensor.
  18.  
  19. With the temperature sensing portion of sensor immersed in hot water, check resistance.
  20.  
  21. Standard values are: 5.1-6.5 Kohms at 32°F. 2.1-2.7 Kohms at 68°F. 0.9-1.3 Kohms [at 40°C (68°F). 0.26-0.36 Kohms [at 80°C (176°F)
  22.  
  23. If not within specifications, replace the sensor.
  24.  

 
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