Supply Line And Check Valve, Checking

WARNING: This page is about a different car, the 2014 Volkswagen Jetta, 2013 Volkswagen Jetta, 2012 Volkswagen Jetta, and 2011 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Hand Vacuum Pump VAS 6213

CAUTION:

When routing the vacuum lines, make sure they are not kinked, twisted or pinched. They could disable the vehicle.
Follow the safety precautions when working on the charge air system and turbocharger. Refer to SAFETY PRECAUTIONS .
Observe the rules for cleanliness. Refer to CLEAN WORKING CONDITIONS .

Always follow these instructions before and during work.

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

Disconnect the vacuum hose from the lower connection on the wastegate bypass regulator valve -arrow in I-.

-- Sealing the open end of the hose with a suitable plug.

NOTE:

Do not use threaded bolts or pins.

-- Disconnect the vacuum hose -arrow- at the vacuum pump connecting piece.

Fig 1: Identifying Supply Line And Check Valve, Checking

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Connect the Hand Vacuum Pump VAS 6213 to the removed hose and generate a vacuum of 0.6 bar (8.7 psi).

-- Observe the pressure gauge on the Hand Vacuum Pump VAS 6213 for approximately 30 seconds.

The vacuum must not drop.

If the vacuum drops:

-- Replace the hose piece, there is damage or leaks in the hose line connection.

If the vacuum does not decrease:

-- First, disconnect the hose at the Hand Vacuum Pump VAS 6213.

-- Remove the plugs from the end of the hose.

-- If the check valve, refer to -item 6- in the VACUUM HOSE CONNECTION DIAGRAM , functions properly, a noticeable hissing can be heard as the vacuum reduces.

If there is not a hissing sound:

-- Replace the check valve.

If there is a hissing sound:

-- Reconnect all the vacuum hoses.

-- Check the control line to the turbocharger. Refer to CONTROL LINE TO TURBOCHARGER, CHECKING .