In-Car Temperature Sensor Test

NOTE: Before testing, check for HVAC DTCs. (see GENERAL TROUBLESHOOTING INFORMATION )

Remove the humidity/in-car temperature sensor (see HUMIDITY/IN-CAR TEMPERATURE SENSOR REPLACEMENT ).
Connect the humidity/in-car temperature sensor 4P connector.
Test the humidity/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.
Compare the resistance reading between terminals No. 4 and No. 3 of the humidity/in-car temperature sensor with the specifications shown in the graph; the resistance should be within the specifications.

Fig 1: Measuring Resistance Between Terminals No. 4 & No. 3 Of Humidity/In-Car Temperature Sensor With Specifications Graph
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If the resistance is not as specified, replace the humidity/in-car temperature sensor (see HUMIDITY/IN-CAR TEMPERATURE SENSOR REPLACEMENT ).