Secondary Injection Combination Valve, Checking For Function And Leaks - Engine Code(S): Bub
WARNING: This page is about a different car, the 2009 Audi TT and 2008 Audi TT. However, it is still accessible from the selected car via links, so may be relevant.
Procedure
- Vacuum lines and hose connections free of leaks.
- Vacuum lines not plugged.
-- Disconnect the hose -arrow- and connect assisting hose into the hose leading to the secondary air injection (AIR) combination valve.
-- 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.
-- 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.
-- If the switch point cannot be detected, replace secondary air injection (AIR) combination valve. Refer to SECONDARY AIR INJECTION COMBINATION VALVE .