Diagnostic Trouble Code (DTC) Information CEM-Dd32

Condition 

Fig 1: Identifying Humidity Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

The diagnostic trouble code is stored if the central electronic module (CEM) registers that communication with the humidity sensor (HUS) is not working.

The diagnostic trouble code (DTC) can be diagnosed with the ignition in positions I or II.

Substitute Value 

• None.

Possible Source 

• Open circuit on power supply to humidity sensor (HUS).
• Open circuit on ground lead to humidity sensor (HUS).
• Contact resistance in the terminals
• Humidity sensor not working (HUS).

Fault symptom[s] 

• Defog/defrost/Windshield defog/defrost/Does not work
• Defog/defrost/Windshield defog/defrost/Slow to clear/uneven clearing