Exhaust Flap Vacuum Diaphragm, Checking

WARNING: This page is about a different car, the 2009 Audi S8, 2008 Audi S8, and 2007 Audi S8. However, it is still accessible from the selected car via links, so may be relevant.

Special tools, testers and auxiliary items required

Fig 1: Hand Vacuum Pump VAS 6213

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Hand vacuum pump VAS 6213

Procedure

Disconnect hose on vacuum diaphragm for exhaust flap at rear muffler.

Fig 2: Connecting Hand Vacuum Pump To Vacuum Diaphragm

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect hand vacuum pump to vacuum diaphragm.
Generate vacuum using hand vacuum pump.

Linkage must move upward.

Vent hand vacuum pump.

Linkage must move downward.

If linkage does not move:

Check linkage for ease of movement and check vacuum diaphragm for leaks.