Charge Air Regulation Vacuum Diaphragm, Checking

Special tools and workshop equipment required 

• Hand Vacuum Pump VAS 6213

Test Conditions: 

• The hose between the turbocharger, the wastegate bypass regulator valve -N75- and the 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: Identifying Hand Vacuum Pump VAS 6213 Connected 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: Identifying Slide Ring On Hand Vacuum Pump VAS 6213 Set To Position For "Pressure"

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 the pressure cannot be built up with the hand vacuum pump VAS 6213 or 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 CHARGE AIR REGULATION VACUUM DIAPHRAGM .