Brake Booster Tester, Connecting

WARNING: This page is about a different car, the 2023 Audi SQ8, 2023 Audi RS Q8, and 2023 Audi Q8. However, it is still accessible from the selected car via links, so may be relevant.

-- Remove the vacuum hose from the brake booster.

TIP:

Pressing the brake pedal a few times beforehand makes it easier to remove the vacuum hose.

Procedure

-- Connect the Brake Servo Tester:VAS6721 .

Fig 1: Connecting Brake Booster VAS6721

Courtesy of AUDI

Item	Component	Explanation
A	Shut-Off Valve	In the direction toward the vacuum hose, the check valve and vacuum pump (if equipped)
B	Shut-Off Valve	Opening the :VAS6721 makes it easier to remove Open to simulate a malfunction source Connect the :VAS6213 .
C	Shut-Off Valve	In the direction toward the brake booster

-- Connect the :VAS6721 hose -A- to the vacuum hose. Push the adapter -C- into the brake booster.

Fig 2: Connect The - VAS 6721- Hose -A- Too The Vacuum Hose And Push The Adapter -C- Into The Brake Booster.

Courtesy of AUDI