Diagnostic Trouble Code (DTC) Information DEM-0009

Condition 

Fig 1: Active On Demand Coupling Control Module

Courtesy of VOLVO CARS OF NORTH AMERICA.

The differential electronic module (DEM) checks the function at the Analog/Digital converter by comparing the analog power supply with the corresponding digital power supply (after Analog/Digital conversion).

The diagnostic trouble code (DTC) is stored if the signal from the Analog/Digital converter deviates from the power supply.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute Value 

• Four wheel drive is disengaged.

Possible Source 

• Internal fault (Analog/Digital converter not working).

Fault symptom[s] 

• Four wheel drive is not functioning.