Coolant Temperature Sensor/Switch (For Computer)

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 PCM 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

50° F 3.30 V

60° F 3.00 V

70° F 2.75 V

80° F 2.44 V

90° F 2.15 V

100° F 1.83 V

110° F 1.57 V

120° F 1.25 V



HOT CURVE (Reference voltage routed to sensor through PCM internal resistance of 10 k ohm)


Temperature Voltage


110° F 4.20 V

120° F 4.00 V

130° F 3.77 V

140° F 3.60 V

150° F 3.40 V

160° F 3.20 V

170° F 3.02 V

180° F 2.80 V

190° F 2.60 V

200° F 2.40 V

210° F 2.20 V

220° F 2.00 V

230° F 1.80 V

240° F 1.62 V

250° F 1.45 V