Cabin Temperature Sensor / Switch: Testing and Inspection

In-Car Temperature Sensor Test

NOTE: Before testing the sensor, check for climate control DTCs Initial Inspection and Diagnostic Overview.

1. Remove the in-car temperature sensor Service and Repair.

2. Test the in-car temperature sensor while holding it in front of the dashboard center vent:

- Measure the resistance with the system set to Max Cool.
- Measure the resistance with the system set to Max Hot.

3. Compare the resistance reading between terminals No. 2 and No. 3 of the in-car temperature sensor with the specifications shown in the graph; the resistance should be within the specifications.





4. If the resistance is not as specified, replace the in-car temperature sensor Service and Repair.

NOTICE
Incorrectly applying power and ground to the in-car temperature sensor will damage it. Follow the instructions carefully.

5. Connect battery power to terminal No. 1 of the in-car temperature sensor, and ground terminal No. 4; the aspirator fan should run.

6. If the aspirator fan did not run in step 5, replace the in-car temperature sensor Service and Repair.