Humidity/In-Car Temperature Sensor Test

Humidity Sensor Test

NOTE: Before testing, check for HVAC DTCs.

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). Measure the voltage between 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, check for HVAC DTCs How To Troubleshoot The Climate Control System.

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. 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.

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

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Humidity Sensor: Testing and Inspection

Use the Manual With the Right Hardware

When to See a Mechanic

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