Secondary Air Injection Combination Valves, Checking For Function And Leaks

WARNING: This page is about a different car, the 2012 Audi Q5 and 2011 Audi Q5. However, it is still accessible from the selected car via links, so may be relevant.

Procedure

Fig 1: Identifying Strut Tower Brace And Fasteners

Courtesy of AUDI OF AMERICA, LLC

Hose connections properly sealed.

-- Remove the tower brace, refer to TOWER BRACE, REMOVING AND INSTALLING .

Right Secondary Air Injection Combination Valve:

Fig 2: Free Up Air Guide Pipe And Fuel Hose

Courtesy of AUDI OF AMERICA, LLC

-- Free up the fuel line -1- and the wire -2- to the EVAP canister at the air guide pipe.

-- Remove the vacuum hose -3- from the connection on the air guide pipe.

-- Remove the air guide pipe by loosening the hose clamp -4- and opening the clips -arrows-.

Continued for both sides:

Fig 3: Identifying Secondary Air Pipe

Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -2- and push the secondary air hoses to the side.

NOTE:

Ignore -item 1-.

-- Connect the hose -arrow- to the secondary air combination valve as illustrated.

Fig 4: Connecting Hose To Secondary Air Combination Valve

Courtesy of AUDI OF AMERICA, LLC

-- Blow lightly into the assisting hose by mouth, do not use compressed air.

The secondary air injection combination valve must be closed and it must not be possible to blow through it.

-- Blow forcefully into the assisting hose by mouth, do not use compressed air.

The secondary air injection combination valve must open and it must be possible to blow through it.

-- If the switch point cannot be detected, replace secondary air injection (AIR) combi-valve: left LEFT COMBINATION VALVE, REMOVING AND INSTALLING , right RIGHT COMBINATION VALVE, REMOVING AND INSTALLING .

Assembling

Assemble in reverse order of disassembling. Note the following:

NOTE:

The hose connections as well as the air guide pipes and hoses must be free of oil and grease before installing.

Secure all hose connections with hose clamps of the same type as those equipped by the factory .

In order to be able to securely mount the air guide hoses on their connectors, spray the screws on the previously used clamps with a rust remover.

-- Install the tower brace, refer to TOWER BRACE, REMOVING AND INSTALLING .