Scheme of vacuum lines.
1 - injection pump,
2 - vacuum pump,
3 - absolute air pressure sensor in the intake manifold,
4 - electropneumatic valve of the absolute air pressure sensor in the intake manifold,
5 - electro-pneumatic valve for increasing the idle speed when the air conditioner and heater are turned on,
6 - electropneumatic vacuum control valve,
7 - electropneumatic valve of the exhaust gas recirculation system,
8 - exhaust gas recirculation valve,
9 - drive to increase the idle speed.