Control Line To Turbocharger, Checking

- Disconnect the hose on the center connection on the wastegate bypass regulator valve -arrow in I- and on the turbocharger vacuum diaphragm -arrow in II-.

Fig 1: Identifying Turbocharger Wastegate Bypass Regulator Valve/Vacuum Diaphragm

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

- Seal off the opening in the hose with a plug.

NOTE: Do not use threaded bolts or pins.

- Connect the hand vacuum pump VAS 6213 to the other end of the hose and generator a vacuum of 0.6 bar.

- Watch the pressure gauge on the hand vacuum pump for approximately 30 seconds.

- The vacuum must not drop.

If the vacuum drops:

- Replace the vacuum hose.

If the vacuum does not decrease:

- Connect all the vacuum hoses.

- Install the engine cover. Refer to ENGINE COVER .