Engine - Coolant Temperature Sensor/Switch: Testing and Inspection
COMPONENT INSPECTIONCheck resistance as shown in the figure.
Temperature °C (°F) Resistance K Ohms
20 (68) / 2.1 - 2.9
50 (122) / 068 - 1.00
90 (194)/ 0.236 - 0.260
If NG, replace engine coolant temperature sensor.