Ambient Temperature Sensor / Switch HVAC: Testing and Inspection

Outside Air Temperature Sensor Test

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

1. Remove the outside air temperature sensor Service and Repair.

2. Dip the sensor in ice water, and measure the resistance. Then pour warm water on the sensor, and check for a change in resistance.

3. Compare the resistance reading between terminals No. 1 and No. 2 of the outside air 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 outside air temperature sensor Service and Repair.