subaru Workshop Repair Guides

Subaru Workshop Service and Repair Manuals

Temperature Sensor (Gauge) > < Circuit Inspection
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Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
Component Inspection

1.

Place coolant thermosensor into a container with water.

2.

Install suitable ohmmeter onto coolant thermosensor and measure the resistance.

3.

With water temperature at 68 deg. F., resistance value obtained should be 2-3 kohms.

4.

Heat water until temperature is 122 deg. F. Resistance value obtained should be 700-1000 ohms. If resistance values obtained are not within
specification, replace coolant thermosensor.

5.

If the test is to be conducted in the car, a cold (shop temperature) thermosensor will be 2-3 kohms and a fully warmed up thermosensor (approx.
180 deg.F) will be 250-400 ohms.

Temperature Sensor (Gauge) > < Circuit Inspection