Internal Fault: Information: Overview

The differential electronic module (DEM) has registered an internal fault.

If the fault is intermittent, it has been registered previously but is no longer present. Intermittent faults can be caused by interference at start up of the differential electronic module (DEM) or may be a different type of fault which occurs on different occasions. The fault is evaluated depending on how it occurs. Replace the differential electronic module (DEM) if the fault recurs.

Other information: 

• For AW50AWD and 4T65AWD 2003-, see DIFFERENTIAL ELECTRONIC MODULE (DEM), REPLACING
• For TF-80SC 2005- see DIFFERENTIAL ELECTRONIC MODULE (DEM), REPLACING (2005-2008) .

Remedy as necessary.

Fig 1: Active On Demand Coupling Control Module

Courtesy of VOLVO CARS CORPORATION

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