Turbocharger Vacuum Diaphragm, Checking

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Special tools and workshop equipment required

Hand Vacuum Pump VAS6213

Test Conditions

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

Work Procedure

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

-- Connect Hand Vacuum Pump VAS6213 to vacuum diaphragm -arrow-.

Fig 1: Connecting Hand Vacuum Pump VAS6213 To Vacuum Diaphragm

Courtesy of AUDI OF AMERICA, LLC

-- Set the slide ring -1- on Hand Vacuum Pump VAS6213 to position -B- for "vacuum".

Fig 2: Adjusting Hand Vacuum Pump Slide Ring

Courtesy of AUDI OF AMERICA, LLC

CAUTION:

The pressure must not exceed 750 mbar (10.8 psi). If the pressure is exceeded, the vacuum diaphragm can be damaged.

-- Operate Hand Vacuum Pump VAS6213 several times and observe rods.

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

Fig 3: Identifying Linkage Movement

Courtesy of AUDI OF AMERICA, LLC

The linkage stroke is approximately 10 mm.

NOTE:

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

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

Replace the turbocharger. Refer to TURBOCHARGER, REMOVING AND INSTALLING .