Clutch Unit And Control Module

Courtesy of VOLVO CARS CORPORATION

1. Inner and outer wet clutch plates.
2. Inner clutch hub with splines for output shaft.
3. Input shaft.
4. Electric feed pump.
5. Differential electronic module (DEM).
6. Bleed valve.
7. Annular piston.

The Differential Electronic Module (DEM) is fitted on the clutch unit housing.

The Differential Electronic Module (DEM) communicates with other control modules via CAN:

The control module has integrated diagnostics for its own components and functions.