The circuit is open: 1 - ignition switch; 2 - electromagnetic starting nozzle; 3 - thermal time relay; 4 - fuel pump relay; 5 - fuel electric pump; 6 - control pressure regulator; 7 - additional air supply valve.
Cold engine start. Voltage is supplied to the starting injector and the thermal time relay. The engine is running (voltage is supplied from terminal "1" of the ignition coil). The fuel pump relay, fuel electric pump, additional air supply valve and control pressure regulator are on.
Ignition on, engine running. Fuel pump relay, fuel electric pump, additional air supply valve and control pressure regulator are on
Ignition is on, engine is not running. Voltage from terminal "1" of ignition coil is not supplied. Fuel pump relay, fuel electric pump, additional air supply valve and control pressure regulator are de-energized