Secondary Air Injection Solenoid Valve, Checking: Procedure: Disassembling

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 Audi S7, 2018 Audi RS 7, 2017 Audi S7, 2017 Audi RS 7, and 2016 Audi S7. However, it is still accessible from the selected car via links, so may be relevant.

-- Remove the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

WARNING:

Fire hazards and risk of damage for a faulty engine cover.

The engine cover must be always be installed before the hood is closed.
The engine may neither be started nor driven without an engine cover.

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

Courtesy of AUDI OF AMERICA, LLC

NOTE:

The hose to the right combination valve is shown in the illustration.

-- Connect the : VAS6213 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 so press the release buttons.

-- Blow into the secondary air injection hose using light pressure (do not use compressed air). Lengthen the secondary air injection hose with an extension hose, if necessary.

The secondary air injection 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 be possible to blow through.

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