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Coolant Temperature Sensor/Switch (For Computer): Electrical Specifications

Sensor Resistance Values

Temperature  ..................................................................................................................................................................................  Resistance (k-ohms)    

-40° F  ..........................................................................................................................................................................................  291.49  to 381.71    

 -4° F  ............................................................................................................................................................................................   85.85  to 108.39    

 14° F  ............................................................................................................................................................................................   49.25  to  61.43    

 32° F  ............................................................................................................................................................................................   29.33  to  35.99    

 50° F  ............................................................................................................................................................................................   17.99  to  21.81    

 68° F  ............................................................................................................................................................................................   11.37  to  13.61    

 77° F  .............................................................................................................................................................................................    9.12  to  10.88    

 86° F  ..............................................................................................................................................................................................    7.37  to   8.75    

104° F  .............................................................................................................................................................................................    4.90  to   5.75    

122° F  .............................................................................................................................................................................................    3.33  to   3.88    

140° F  .............................................................................................................................................................................................    2.31  to   2.67    

158° F  .............................................................................................................................................................................................    1.63  to   1.87    

176° F  .............................................................................................................................................................................................    1.17  to   1.34    

194° F  ...............................................................................................................................................................................................     .86  to    .97    

212° F  ...............................................................................................................................................................................................     .68  to    .72    

230° F  ...............................................................................................................................................................................................     .48  to    .54    

248° F  ...............................................................................................................................................................................................     .37  to    .41    

Temperature VS. Voltage Curve

NOTE:  For information on how this type of sensor operates SEE, Powertrain Management/Computers and Control Systems/Coolant Temperature

Sensor/Description and Operation.

NOTE:  Measure resistance using a high impedance Digital Volt Ohmmeter (DVOM).

COLD CURVE  (Reference voltage routed to sensor through controller internal resistance of 10k ohm)

Temperature ................................................................................................................................................................................  Voltage    

-20° F ..........................................................................................................................................................................................  4.70 V    

-10° F ..........................................................................................................................................................................................  4.57 V    

  0° F ............................................................................................................................................................................................  4.45 V    

 10° F ...........................................................................................................................................................................................  4.30 V    

 20° F ...........................................................................................................................................................................................  4.10 V    

 30° F ...........................................................................................................................................................................................  3.90 V    

 40° F ...........................................................................................................................................................................................  3.60 V    

Sensors and Switches > Sensors and Switches - Cooling System > Engine - Coolant Temperature Sensor/Switch > Coolant Temperature Sensor/Switch (For Computer) > Component Information > Specifications > Electrical Specifications

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