Checking combination valve for secondary air system for proper operation and leakage — AUDI

🧭 Before you start

Fits: Audi A3 (8L, 1996–2003)

Don't miss

• Blow gently into hose (do not use compressed air).
• Secure all hose connections with the correct type of hose clips (same as original equipment) Parts catalogue.

🔧 Engine codes this applies to

📋 Procedure

1. Take off engine cover panel (arrows).
2. Remove cover in front of intake manifold (arrows).
3. Detach air hose (1) leading to secondary air pump at air cleaner housing.
4. Release hose clip (2) and detach air duct from air mass meter G70.
5. Unplug electrical connector at air mass meter G70 (item 3).

6. Unscrew bolts (4) and (5) and remove air cleaner housing.
7. Detach vacuum hose (2) from combination valve for secondary air system.
8. Connect the hand-operated vacuum pumpV.A.G 1390 to vacuum connection of combination valve for secondary air.
9. Disconnect air hose (arrow) at secondary air pump.
10. Connect suitable test hose to air hose connection on secondary air pump.
11. Blow gently into hose (do not use compressed air).
12. Use hand-operated vacuum pump to generate vacuum.
13. Renew secondary air combination valve . [Note: Secure all hose connections with the correct type of hose clips (same as original equipment) Parts catalogue.]

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