Turbocharger Vacuum Diaphragm, Checking

Special tools and workshop equipment required

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 OK.

Work Procedure:

-- Remove the engine cover and air filter. Refer to Removal and Installation .

-- Connect VAS 6213 to vacuum diaphragm -arrow-.

Fig 1: Connecting Hand Vacuum Pump VAS 6213 To Vacuum Diaphragm

Courtesy of AUDI OF AMERICA, LLC

-- Set the slide ring -1- on VAS 6213 to position -B- for "pressure".

Fig 2: Adjusting Slide Ring On Hand Vacuum Pump VAS 6213 To Position For "Pressure"

Courtesy of AUDI OF AMERICA, LLC

CAUTION:

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

-- Operate VAS 6213 several times and observe rods.

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

Actuator lift is approximately 10 mm.

Fig 3: Identifying Linkage Movement

Courtesy of AUDI OF AMERICA, LLC

NOTE:

If pressure cannot be raised with VAS 6213 or pressure drops immediately, check VAS 6213 and connecting hoses for leaks. If no malfunction can be found: Replace vacuum diaphragm. Refer to TURBOCHARGER VACUUM DIAPHRAGM .