Secondary Air Injection Combination Valves, Checking For Function And Leaks: Procedure

WARNING: This page is about a different car, the 2012 Audi S5, 2011 Audi S5, and 2010 Audi S5. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Cover -1- And -2-

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

-- Remove the engine covers -1 and 2- upward.

-- Remove the vacuum hose -1- or -2- on the combination valve being checked.

Fig 2: Identifying Vacuum Hose -2-

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-- Connect the VAS 6213 to the vacuum hose for the combination valve to be checked.

-- Remove the front secondary air hose -arrow- from its bracket and disconnect it; do to this press the release buttons.

Fig 3: Identifying Front Air Hose -Arrow

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-- Blow into the Secondary Air Injection (AIR) hose using light pressure (do not use pressurized air).

The AIR combination valves must be closed. It must not be possible to blow through.

-- Operate hand vacuum pump.

The relevant combination valve must open, it must not be possible to blow through

-- If the secondary air combination valve does not open, replace: Left, refer to SECONDARY AIR INJECTION LEFT COMBINATION VALVE , right, refer to SECONDARY AIR INJECTION RIGHT COMBINATION VALVE .