Removing
1. Disconnect the battery from the ground.
2. Disconnect the connector from the valve (1 - connector, 2 - fastening screws).
3. Loosen the screws and remove the valve with gasket.
4. Disassemble the valve and check the free movement of the piston.
5. If the piston sticks, replace the valve.
Installation
6. Installation is carried out in the reverse order.