1. Disconnect the wire from the terminal «minus» battery.
2. Having pressed a clamp, disconnect a block of a plait of wires from the electromagnetic valve.
3. Disconnect the vacuum inlet and outlet hoses from the valve fittings.
4. Wring out a clamp of fastening of the electromagnetic valve to an arm of the vacuum accumulator and remove the valve.
5. To check the valve, attach a medical syringe to the outlet fitting of the valve (it is used as a pump), Press the plunger of the syringe - the valve should be pressurized (it will be felt by the desire of the syringe plunger to return to its original position). Then connect a 12V DC source to the valve terminals, the valve should open and the pressure should disappear (the plunger of the syringe will drown without resistance until it stops). Otherwise, replace the valve.
6. Install the valve in the reverse order of removal.