A8L Quattro Sedan W12-6.0L (BSB) (2005)
Exhaust Pressure Regulator Vacuum Solenoid: Testing and Inspection
Exhaust Flap Vacuum Diaphragm, Checking
Special tools, testers and auxiliary items required
‹› Hand vacuum pump (V.A.G 1390)
Test Sequence
-
Disconnect hose on vacuum diaphragm for exhaust flap at rear muffler.
-
Connect hand vacuum pump (V.A.G 1390) 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 the vacuum diaphragm for leaks.