Secondary Air Injection Combination Valve, Version 1, Checking For Function And Leaks

WARNING: This page is about a different car, the 2010 Audi Q7, 2009 Audi Q7, 2008 Audi Q7, and 2007 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

Procedure

Hose connections properly sealed.

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

Fig 1: Identifying Cylinder Bank 1 (Right) Secondary Air Injection (AIR) Combi-Valve (Version 1)

Courtesy of AUDI OF AMERICA, LLC

NOTE:

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.

Fig 2: Connecting An Appropriate Assisting Hose To Combination Valve

Courtesy of AUDI OF AMERICA, LLC

-- 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 AIR combination valve must open, it must be possible to blow through.

If the switching point is not recognized:

-- Replace AIR combi-valve.