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Home >> Volvo >> 2003 >> XC90 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Electronic Modules - Design And Function >> Differential Electronic Module (DEM) (TF-80SC AWD; 2005-2008) >> Design >> Control Valve/Axial Solenoid

Control Valve/Axial Solenoid

Fig 1: Identifying Control Valve / Axial Solenoid
GLL147997Courtesy of VOLVO CARS CORPORATION

The control valve/axial solenoid is located in the Differential Electronic Module (DEM) housing.

The control module supplies a variable pulse width modulated (PWM) signal to the axial solenoid. The solenoid changes the position of the control valve in accordance with the control signal. The pressure to the working piston of the clutch driven plates is controlled in this way.

Four-wheel drive does not function in the event of a fault in the control valve/axial solenoid.

The control valve/axial solenoid can be diagnosed.