Monday, November 21, 2011

VACUUM DIAGRAMS For Audi A4?


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The details are as follows 

The following vacuum diagrams are representative of diagrams and components used in the emission control systems of these vehicles. Because there are many different make, model, engine, transmission, and calibration-level versions, there are many more vacuum diagrams than can be provided here.
Always consult the emission label under the hood for the most accurate vacuum diagram for that specific vehicle.
If the label is missing, contact your local Audi dealer for a replacement.


Click image to see an enlarged view
Fig. Audi A4 2.8L Vacuum Diagram
Key List for gnam 93224vwg70:
1.Brake booster
2. Check valve
3. Vacuum canister, for intake manifold change over valve
4. Check valve
5. Throttle body
6. Ignition coils
7. Vacuum reservoir, for intake manifold change over valve
8. Air cleaner
9. Intake manifold
10. Sensor for EVAP canister
11. EVAP canister
12. EVAP canister purge regulator valve
13. Fuel pressure regulator
14. T connector, only for vehicles with A/C and/or EGR
15. Check valve
16. T connector, only for vehicles with A/C
17. To A/C
18. Intake manifold change-over valve
19. EGR vacuum regulator solenoid valve
20. Sound dampener
21. EGR valve


Click image to see an enlarged view
Fig. Audi A4 2.7L Vacuum Diagram
Key List for gnam 93224vwg71:
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
8. Wastegate bypass regulator valve
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
14. Vacuum limiter valve
15. Fuel pressure regulator
16. To Leak Detection Pump (LDP)
17. Vacuum reservoir
18. Turbocharger engine bank 2
19. Pressure unit for boost pressure regulation
20. Combination valve for secondary air injection (AIR)
21. Check valve (arrow indicates direction of flow through valve)
22. Charge air cooler engine bank 2
23. Pressure hose engine bank 2
24. Recirculating valve for turbocharger
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
36. Charge air cooler engine bank 1
37. Pressure unit for boost pressure regulation


Click image to see an enlarged view
Fig. Audi A4 1.8L Vacuum Diagram
Key List for gnam 93224vwg72:
1. EVAP canister
2. From fuel tank
3. Evaporative Emission (EVAP) canister purge regulator valve
4. Check valve for EVAP canister. Between EVAP canister and intake manifold before turbocharger. Installation position (light/dark side): Arrow points in direction of flow.
5. Air cleaner
6. Turbocharger
7. Combination valve for secondary air injection (AIR)
8. Fuel pressure regulator
9. To power brake booster
10. Check valve-Installation position (light/dark side): Arrow points in direction of flow.
11. Vacuum booster
12. To Leak Detection Pump (LDP)
13. Vacuum reservoir
14. Distributor piece
15. Check valve-Installation position (light/dark side): Arrow points in direction of flow.
16. Secondary Air Injection (AIR) solenoid valve
17. Crankcase vent
18. Check valve-Installation position (light/dark side): Arrow points in direction of flow.
19. To tank Leak Detection Pump (LDP)
20. Check valve-Installation position (light/dark side): Arrow points in direction of flow.
21. Charge air cooler
22. Throttle valve control module
23. Recirculating valve for turbocharger
24. Intake manifold
25. Pressure unit for boost pressure regulation
26. Wastegate bypass regulator valve
27. Mechanical recirculation valve
28. Pressure control valve for crankcase ventilation
29. Secondary Air Injection (AIR) pump motor


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This will help.Thanks.
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