how to tell if a temp sensor is bad? where is it?
Aug 21, 2008 at 1:52 AM
coolant temperature sensor
1999 JEEP CHEROKEE
DREW822
- MEMBER
- 1 POST
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SQM
- ✓ASE Certified Mechanic
- 6,383 POSTS
Hello,
Remember to only work on the cooling system when the engine is cool.
The coolant temperature sensor is located on the thermostat housing (see diagram below).
To test the coolant temperature sensor you will have to check the resistance between the two pin that is on the back of the sensor.
As for the resistance value it will depend on the temperature of the sensor. I have attached the chart for the resistance range for a given temperature.
https://www.2carpros.com/articles/how-a-coolant-temperature-sensor-works
https://www.2carpros.com/articles/symptoms-of-a-bad-coolant-temperature-sensor
https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement
Please let me know of any questions.
Thank you.
Remember to only work on the cooling system when the engine is cool.
The coolant temperature sensor is located on the thermostat housing (see diagram below).
To test the coolant temperature sensor you will have to check the resistance between the two pin that is on the back of the sensor.
As for the resistance value it will depend on the temperature of the sensor. I have attached the chart for the resistance range for a given temperature.
https://www.2carpros.com/articles/how-a-coolant-temperature-sensor-works
https://www.2carpros.com/articles/symptoms-of-a-bad-coolant-temperature-sensor
https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement
Please let me know of any questions.
Thank you.
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Sep 18, 2021 at 9:05 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.