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Coolant Temperature Sensor

Using a thermometer, record coolant temperature. Connect ohmmeter between ground and terminal "2" at ECU connector. If reading is not as specified, replace sensor. See COOLANT TEMPERATURE SENSOR RESISTANCE table. Extremely high resistance value indicates open circuit and zero resistance indicates short circuit.

COOLANT TEMPERATURE SENSOR RESISTANCE

Temperature	(Ohms)
68°F (20°C)	2280-2720
175°F (80°C)	290-364