Humidity Sensor: Testing and Inspection

Humidity/In-Car Temperature Sensor Test

Humidity Sensor Test

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

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

2. Connect the humidity/in-car temperature sensor 4P connector.

3. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode. Measure the voltage between the terminals with the (+) probe on terminal No. 2 and the (-) probe on terminal No. 3 with the connector connected.









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

In-Car Temperature Sensor Test

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

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

2. 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.

3. Compare the resistance reading between terminals No. 3 and No. 4 of the humidity/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 humidity/in-car temperature sensor Service and Repair.

5. Clear any DTCs set when you disconnected the humidity/in-car temperature sensor.