Humidity Sensor Test

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

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.
Turn the ignition switch to ON (II). Measure the voltage between the terminals with the (+) probe on terminal No. 2 and the (-) probe on terminal No. 3 with the connector connected.

Fig 1: Measuring Voltage Between Terminals With (+) Probe On Terminal No. 2 & (-) Probe On Terminal No. 3
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If the voltage is not as specified, replace the humidity/in-car temperature sensor (see HUMIDITY/IN-CAR TEMPERATURE SENSOR REPLACEMENT ).

Fig 2: Identifying Humidity/In-Car Temperature Sensor Voltage Graph
Courtesy of AMERICAN HONDA MOTOR CO., INC.