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Home >> Volvo >> 2009 >> V70 >> Repair and Diagnosis >> External Pages >> Different car >> Section 14 (Miscellaneous Electrical - Design And Function) >> Active On Demand Coupling (AOC) (2003-2004) >> System Overview >> Coupling Unit And Control Module
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Coupling Unit And Control Module

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Fig 1: Coupling Unit And Control Module
GLL107816Courtesy of VOLVO CARS CORPORATION

The hydraulic section consists of 1-5, the mechanical section consists of 6-10 and the electronic section consists of 11-13.

  1. Pressure valves
  2. Accumulator
  3. Oil filter
  4. Annular pistons
  5. Control valve/axial solenoid
  6. Input shaft
  7. Inner and outer wet multi-plate clutch
  8. Inner connection hub with sinusoidal cam disc
  9. Rollers with annular pistons
  10. Output shaft
  11. Electrical feed pump
  12. Differential electronic module (DEM)
  13. Oil pressure and temperature sensor.

The differential electronic module (DEM) is integrated in the coupling unit.

The differential electronic module (DEM) communicates with other control modules using controller area network (CAN) communication.

There are internal diagnostics for the control module.