Combination Valve, Checking For Function And Leaks

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2017 Audi SQ5, 2017 Audi Q5, 2016 Audi SQ5, 2016 Audi Q5, and 2015 Audi SQ5. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Hand Vacuum Pump VAS6213

Procedure

Fig 1: Identifying Strut Tower Brace, Bolts -1- And Nuts -2-

Courtesy of AUDI OF AMERICA, LLC

Vacuum lines and connections not leaking.
Vacuum hoses not blocked.

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

Right Secondary Air Injection Combination Valve:

Fig 2: Identifying Air Duct Pipe

Courtesy of AUDI OF AMERICA, LLC

-- Free up the fuel hose -1- and the EVAP canister hose -2- on the air duct pipe.

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

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

Continued for Both Sides:

NOTE:

The illustration shows the left secondary air injection combination valve.

Ignore item -1-.

-- Remove the left and right bolts -3- for the secondary air injection hose.

-- Remove the vacuum line -2- from the secondary air injection combination valve.

Fig 3: Identifying Vacuum Line -2- And Secondary Air Injection (Air) Combination Valve

Courtesy of AUDI OF AMERICA, LLC

-- Connect the Hand Vacuum Pump VAS6213 to the vacuum connection -1- on the secondary air combination valve that will be tested.

Fig 4: Connecting Hand Vacuum Pump VAS 6213 To Vacuum Connection On Secondary Air Injection Combi-Valve

Courtesy of AUDI OF AMERICA, LLC

-- Connect a suitable assisting hose to the secondary air combination valve -2-.

-- Blow into the secondary air injection hose using light pressure (do not use compressed air).

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

-- Run the hand vacuum pump to generate a vacuum.

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

-- If the right Secondary Air Injection (AIR) combination valve does not react as described, replace it.

Left, refer to SECONDARY AIR INJECTION LEFT COMBINATION VALVE, REMOVING AND INSTALLING
Right, refer to SECONDARY AIR INJECTION RIGHT COMBINATION VALVE, REMOVING AND INSTALLING

Assembling

Assembly is performed in the reverse order of disassembly, noting the following:

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