Vacuum line diagram.
1 - fuel injection pump,
2 - vacuum pump,
3 - absolute air pressure sensor in the intake manifold,
4 - electro-pneumatic valve of the absolute air pressure sensor in the intake manifold,
5 - electro-pneumatic valve for increasing idle speed when the air conditioner and heater are turned on,
6 - vacuum control electro-pneumatic valve,
7 - EGR electro-pneumatic valve,
8 - EGR valve,
9 - idle speed increase drive.
(The text is quoted from the source website: ToyotaMan.ru)