S6 V8-4.2L (BBD) (2004)
Air Injection Control Valve: Testing and Inspection
With Generic Scan Tool
Combination Valves For Secondary Air Injection (AIR) System, Checking Function And For Proper Seal
Recommended special tools and equipment
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VAG1390 Hand Vacuum Pump
Test requirements:
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No leaks in vacuum lines or hose connections.
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Vacuum lines not clogged.
Test sequence
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Remove engine cover (arrows).
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Remove the air intake tube (arrows) between the air filter and the throttle valve part.