Combination Valve, Checking For Function And Leaks: Procedure

WARNING: This page is about a different car, the 2015 Audi RS 5, 2014 Audi RS 5, and 2013 Audi RS 5. However, it is still accessible from the selected car via links, so may be relevant.

Vacuum lines and hose connections free of leaks.
Vacuum lines not plugged.

-- Remove the affected throttle valve control module. Refer to THROTTLE VALVE CONTROL MODULE AND 2 -J338- / -J544-, REMOVING AND INSTALLING .

NOTE:

The left combination valve is illustrated.

-- Remove the vacuum hose -5- on the combination valve to be checked.

Fig 1: Identifying Bolts -1-, Connector -4- And Vacuum Hose -5-, Removal

Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the secondary air hose -3- by pressing the release buttons.

-- Connect the Hand Vacuum Pump: VAS6213 to the vacuum connection -1- for the combination valve to be checked.

Fig 2: Connecting Hand Vacuum Pump To Secondary Air Injection Combi-Valve

Courtesy of AUDI OF AMERICA, LLC

-- Connect the hose -2- to the Secondary Air Injection (AIR) combination valve.

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

The AIR combination valve must be closed and it must not be possible to blow through it.

-- Operate hand vacuum pump.

The AIR combination valve must open and it must be possible to blow through it.

NOTE:

Ignore items -1, 2 and 4-.

-- If the AIR combination valve does not open, replace it. Refer to COMBINATION VALVE, REMOVING AND INSTALLING .