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Home >> Audi >> 2007 >> Q7 Quattro (4LB) V8-4.2L (BAR) >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Air Injection >> Air Injection Control Valve >> Testing and Inspection >> Secondary Air Injection Combination Valve, Version 1, Checking For Function and Leaks
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Secondary Air Injection Combination Valve, Version 1, Checking For Function and Leaks






Secondary Air Injection Combination Valve, Version 1, Checking for Function and Leaks

Procedure

• Hose connections properly sealed.

- Disconnect air guide hose - 1 - from Secondary Air Injection (AIR) combi-valve.





• The illustration shows the left secondary air injection combination valve.

• Ignore items - 2 and 3 -.

- Connect an appropriate assisting hose - arrow - to Secondary Air Injection (AIR) combi-valve.





- Blow into the assisting hose using light pressure (do not use pressurized air).

• Secondary Air Injection (AIR) combination valve must be closed, it must not be possible to blow through.

- Blow into the assisting hose using higher pressure (do not use pressurized air).

• The Secondary Air Injection (AIR) combination valve must open, it must be possible to blow through.

If the switching point is not recognized:

- Replace Secondary Air Injection (AIR) combi-valve.
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