A4 V6-3.0L (AVK) (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 rear engine cover (arrows).
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Remove bolts for holding plate for solenoid valves (arrows).
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Lift up holding plate and disconnect vacuum hose from Y-piece of combination valve to be checked.
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Connect e.g. V.A.G 1390 hand vacuum pump to vacuum hose of combination valve to be checked.