Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection

Coolant Temperature Sensor Resistance Test:

1. With key off, disconnect connector from coolant temperature sensor.

2. Connect ohmmeter across coolant temperature sensor. Resistance should read as follows-

^ Engine/Sensor at normal operating temperature, around 200°F, approximately 700 to 1,000 ohms.

^ Engine/Sensor at room temperature, around 70°F, approximately 7,000 to 13,000 ohms.

3. If resistance is not within specifications, replace sensor.