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Home >> Audi >> 2020 >> S4 Prestige >> Repair and Diagnosis >> External Pages >> Different car >> Section 36 (Hydraulic Components (Brake System) (2 Of 2)) >> 47 Hydraulic Components >> Vacuum System >> Vacuum System, Checking >> Vacuum, Creating With Hand Vacuum Pump

Vacuum, Creating With Hand Vacuum Pump

WARNING: This page is about a different car, the 2021 Audi S4 and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required 

Procedure 

In certain situations, the vacuum can be created using a :VAS6213  instead of using the engine or a vacuum pump.

-- To do so, connect the :VAS6213  to the vacuum hose from the connection -B- to the :VAS6721  .

Fig 1: Identifying VAS 6721 Shut-Off Valves
GWWN47-10210Courtesy of AUDI OF AMERICA, LLC

-- Open the shut-off valve -B-.

-- Create the vacuum using the :VAS6213  until a vacuum between 600 and 950 mbar (8.7 and 13.77 psi) is displayed on the :VAS6721  .

-- Then perform the relevant tests.