TT Quattro Coupe V6-3.2L (CBRA) (2008)
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Air Injection Control Valve: Testing and Inspection
Secondary Injection Combination Valve, Checking for Function and Leaks
Secondary Injection Combination Valve, Checking for Function and Leaks
Procedure
‹› Vacuum lines and hose connections free of leaks.
‹› Vacuum lines not plugged.
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Disconnect the hose - arrow - and connect assisting hose into the hose leading to the secondary air injection (AIR) combination valve.
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Blow lightly into assisting hose by mouth, do not use compressed air.
‹› Secondary Air Injection (AIR) combination valve must be closed, it must not be possible to blow through.
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Blow more strongly into assisting hose by mouth, do not use compressed air.
‹› The Secondary Air Injection (AIR) combination valve must open, it must be possible to blow through.
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If the switch point cannot be detected, replace secondary air injection (AIR) combination valve.