Coolant Temperature Sensor

Disconnect battery ground cable and electrical connector from sensor. Connect an ohmmeter between sensor terminals. Reading should be as shown in Temperature/Resistance Relationship chart.

Disconnect ohmmeter and check resistance between each terminal and sensor body. A very high resistance denoting an open circuit should be obtained. If sensor does not respond as outlined, replace coolant temperature sensor.

TEMPERATURE/RESISTANCE RELATIONSHIP

Temperature (Coolant)	Resistance (Ohms)
14°F (0°C)	9200
32°F (0°C)	5900
68°F (20°C)	2500
104°F (40°C)	1180
140°F (60°C)	600
176°F (80°C)	325