A3 Quattro V6-3.2L (BUB) (2008)
Exhaust Pressure Regulator Vacuum Reservoir: Testing and Inspection
Exhaust Flap Vacuum Diaphragm, Checking
Special tools, testers and auxiliary items required
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Hand vacuum pump VAS 6213
Test Sequence
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Vacuum lines and hose connections free of leaks.
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Vacuum lines not plugged.
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Disconnect hose on vacuum diaphragm for exhaust flap at rear muffler.
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Connect hand vacuum pump to vacuum diaphragm.
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Generate vacuum using hand vacuum pump.
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Linkage must move upward.
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Vent hand vacuum pump.
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Linkage must move downward.
If linkage does not move:
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Check linkage for ease of movement and check vacuum diaphragm for leaks.