In-car Temperature Sensor Test

WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.

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

Remove the humidity/in-car temperature sensor (see HUMIDITY/IN-CAR TEMPERATURE SENSOR REPLACEMENT )
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: Humidity/In-Car Temperature Sensor Resistance 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 )
Clear any DTCs set when you disconnected the humidity/in-car temperature sensor