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Home >> Volvo >> 2008 >> V70 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Differential Electronic Module (DEM), Driver Information Module (Dim), Engine And Engine Control Module (ECM) - Design And Function >> Differential Electronic Module (DEM) (2009-2010) >> Design >> Pressure Reducing Valve
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Pressure Reducing Valve

Fig 1: View of Pressure Reducing Valve
GLL147998Courtesy of VOLVO CARS CORPORATION

The pressure reducing valve is located in the Differential electronic module (DEM).

The pressure reducing valve receives a constant pulse width modulated (PWM) signal from the control module. The control signal from the control module changes the position of the pressure reducing valve. This regulates the pressure to the discs' operating piston.

In case of diagnostics failure of the pressure reducing valve, four-wheel drive is lost.

The pressure reducing valve can be diagnosed.

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