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Home >> Audi >> 2001 >> allroad Automatic >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 2.7L V6 BITURBO - APB, Bel >> Engine - Assembly >> Engine, removing and installing >> Vacuum Hose Diagram(S) >> Vehicles with Secondary Air Injection (AIR)

Vehicles with Secondary Air Injection (AIR)

NOTE: The following list refers to items in Fig 1.
  1. - To reservoir under right front wheel housing shell. 
  2. - Air cleaner 
  3. - Mass Air Flow (MAF) sensor 
  4. - Evaporative Emission (EVAP) canister 
  5. - Turbocharger engine bank 1 
  6. - Combination valve for secondary air injection (AIR) 
  7. - Secondary Air Injection (AIR) solenoid valve - N112- 
  8. - Wastegate bypass regulator valve -N75 
  9. - Check valve for crankcase ventilation 
  10. - Collector housing for crankcase ventilation 
  11. - To power brake booster 
  12. - Check valve (arrow indicates direction of flow through valve) 
  13. - Secondary Air Injection (AIR) pump motor -V101- 
  14. - Vacuum limiter valve 
  15. - Fuel pressure regulator 
  16. - To Leak Detection Pump (LDP) -V144- 
  17. - Vacuum reservoir 
  18. - Turbocharger engine bank 2 
  19. - Pressure unit for charge air pressure regulation 
  20. - Combination valve for secondary air injection (AIR) 
  21. - Check valve (arrow indicates direction of flow through valve) 
  22. - Charge air pressure cooler engine bank 2 
  23. - Pressure hose engine bank 2 
  24. - Recirculating valve for turbocharger -N249- 
  25. - Cut-out valve (mechanical circulation valve) 
  26. - Connection hose 
  27. - Pressure line engine bank 2 
  28. - Connection hose 
    • for both charge air coolers
  29. - Check valve for crankcase ventilation 
  30. - Connection hose 
  31. - Cut-out valve (mechanical circulation valve) 
  32. - Pressure line engine bank 1 
  33. - Pressure hose engine bank 1 
  34. - Check valve (arrow indicates direction of flow through valve) 
  35. - Evaporative Emission (EVAP) canister purge regulator valve -N80- 
  36. - Charge air pressure cooler engine bank 1 
  37. - Pressure unit for charge air pressure regulation 
Fig 1: Vacuum Diagram, Complete - Vehicles With Secondary Air Injection (AIR)
G02724947Courtesy of AUDI OF AMERICA, INC.