Combination Valve, Checking: Procedure: Disassembling

WARNING: This page is about a different car, the 2018 Audi A6 Quattro, 2017 Audi A6 Quattro, and 2016 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

-- Remove the Throttle Valve Control Module -J338-. Refer to THROTTLE VALVE CONTROL MODULE -J338-, REMOVING AND INSTALLING .

-- Release the catches -arrow- and push the wiring duct -1- to the rear.

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

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-- Connect the :VAS6213 to the vacuum hose for the combination valve to be checked.

-- Press the release button to remove the Secondary Air Injection (AIR) hose -arrow- from the Secondary Air Injection Pump Motor -V101-.

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-- Extend the AIR hose with an adapter hose and blow lightly into the adapter hose by mouth, do not use compressed 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 be possible to blow through

NOTE:

Before It Is Possible To Blow Through A Light Pressure Must Be Overcome.

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