Exhaust turbocharger vacuum diaphragm, checking

WARNING: This page is about a different car, the 2009 Audi A4, 2008 Audi A4, 2007 Audi A4, 2006 Audi A4, and 2005 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Special tools, testers and auxiliary items required

Fig 1: Identifying Hand Vacuum Pump VAS 6213

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Hand vacuum pump VAS 6213

Test conditions:

Hose from exhaust turbocharger over Wastegate Bypass Regulator Valve N75 must have continuity to vacuum diaphragm.
Wastegate Bypass Regulator Valve N75 OK.

Work procedure:

Fig 2: Separating Electrical Connector

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Separate electrical connector - 1 -.
Disconnect intake connection - arrow - using spring-type clip pliers VAS 5024A.
Remove engine cover upward and out in direction of - arrow -.

Fig 3: Connecting Hand Vacuum Pump VAS 6213 To Vacuum Diaphragm

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Connect Hand Vacuum Pump VAS 6213 to vacuum diaphragm - arrow -.

Fig 4: Setting Slide Ring On Hand Vacuum Pump VAS 6213 To Position For "Pressure" or "Vacuum"

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Set slide ring - 1 - on hand vacuum pump VAS 6213 to position - B - for "pressure".

CAUTION: The pressure must not exceed 750 mbar. If the pressure is exceeded, the vacuum diaphragm can be damaged.

Operate Hand Vacuum Pump VAS 6213 several times and observe rods.

The linkage - A - must move approx. 300 mbar and be at approx. 700 mbar at end position.

Fig 5: Identifying Linkage Movement

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Actuator lift is approx. 10 mm.

NOTE:

If pressure cannot be raised with Hand Vacuum Pump VAS 6213 or pressure drops immediately, check Hand Vacuum Pump VAS 6213 and connecting hoses for leaks. If no malfunction can be found: Replace vacuum diaphragm → Vacuum diaphragm for turbocharger, removing and installing .