Turbocharger Vacuum Diaphragm, Checking

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2017 Audi A5 Quattro, 2016 Audi A5 Quattro, 2015 Audi A5 Quattro, 2014 Audi A5 Quattro, and 2014 Audi A5. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools And Workshop Equipment Required

Hand Vacuum Pump :VAS6213

Test Conditions:

The hose from the turbocharger must have flow to the vacuum diaphragm via the Wastegate Bypass Regulator Valve -N75-.
Wastegate Bypass Regulator Valve -N75- OK

Preliminary work may be required depending on the model. Refer to TURBOCHARGER VACUUM DIAPHRAGM, REPLACING .

-- Remove the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

-- Connect the :VAS6213 to the vacuum diaphragm -arrow-.

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-- Set the slide ring -1- on :VAS6213 to position -B- for "pressure".

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CAUTION:

- Never set the test pressure specified.

-- Operate the :VAS6213 several times and observe the linkage.

The linkage -A- must move approximately 300 mbar (4.35 psi) and be at approximately 700 mbar (10.15 psi) at end position.

The linkage stroke is approximately 10 mm.

Courtesy of AUDI OF AMERICA, LLC

NOTE:

If pressure cannot be raised using the :VAS6213 or pressure drops immediately, check the :VAS6213 and connecting hoses for leaks.

If no fault is found with the :VAS6213 and the connecting hoses:

In vehicles with a 1.8L engine, replace the vacuum diaphragm. Refer to TURBOCHARGER VACUUM DIAPHRAGM, REPLACING .
On vehicles with a 2.0L engine, replace the turbocharger. Refer to TURBOCHARGER, REMOVING AND INSTALLING .