Turbocharger Vacuum Diaphragm, Checking

Special Tools And Workshop Equipment Required 

• Hand Vacuum Pump VAS 6213

Test Conditions

• The hose between the turbocharger, wastegate bypass regulator valve and vacuum diaphragm must not be kinked.
• The wastegate bypass regulator valve is OK.

Test Sequence

-- Remove the engine cover. Refer to ENGINE COVER .

-- Connect the hand vacuum pump VAS 6213 to the vacuum diaphragm -arrow-.

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

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

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

Fig 2: Adjusting Hand Vacuum Pump Slide Ring

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Operate the hand vacuum pump VAS 6213 several times and observe the rods:

• The linkage -A- must move approximately 300 mbar and be at approximately 700 mbar at the end position.
  Fig 3: Identifying Linkage Movement

  Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
• Actuator lift is approximately 10 mm.

If pressure cannot be built up with the hand vacuum pump VAS 6213 or the pressure falls again immediately:

-- Check the hand vacuum pump VAS 6213 and the connecting hoses for leaks.

If no malfunction can be found:

-- Replace the vacuum diaphragm. Refer to TURBOCHARGER VACUUM DIAPHRAGM .