Suction jet pump (vehicles with automatic transmission)

NOTE: The following list refers to items in Fig 1.

1. - To air cleaner 
2. - Non-return valve (arrow indicates direction of flow) 
3. - Distributor piece (simplified) 
4. - To brake servo 
5. - Suction jet pump 
6. - Air duct 
7. - Connection for crankcase breather 
8. - To intake side of turbocharger, Bank 2 
9. - Intake manifold 
10. - To intake side of turbocharger, Bank 1 

Fig 1: Identifying Suction Jet Pump System Components With Vacuum Diagram (Vehicles With Automatic Transmission)

Courtesy of AUDI OF AMERICA, INC.