Checking linkage and vacuum unit for charge pressure control at turbocharger — AUDI

🧭 Before you start

Fits: Audi A4 B5 (8D)

• Special tools named: V.A.G 1390
• Renewed: turbocharger

🔧 Engine codes this applies to

📐 60 workshop diagrams for AFB

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Check that all vacuum hoses have been fitted and are not leaking .
2. Switch on turbocharger tester and set measuring range selector switch to position (I) (absolute pressure).
3. Attach test hose to connection (I).
4. Detach caps on engine cover panel.
5. Unbolt and remove engine cover panel (arrows).

6. Disconnect hose (arrow) from vacuum unit for charge pressure control.
7. Connect hand vacuum pumpVAS 6213 or V.A.G 1390 and turbocharger testerV.A.G 1397A using test hoses (as shown in illustration).
8. Operate vacuum pump.
9. Read the vacuum value on turbocharger testerV.A.G 1397A.
10. Also observe linkage at turbocharger.
11. Renew turbocharger .

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