Secondary Air Injection (AIR) Combination Valve, Checking Function and for Leaks

Secondary Air Injection (AIR) Combination Valve, Checking Function and for Leaks

Special tools, testers and auxiliary items required

• Hand vacuum pump (VAG 1390)

Test Prerequisites

• Vacuum lines and hose connections free of leaks.

• Vacuum lines not plugged.

Test Sequence

- Remove the engine cover - 1 - upward.





- Disconnect the vacuum hose - arrow - from the Secondary Air Injection (AIR) combination valve to be checked.





- Connect the (VAG 1390) to the vacuum hose for the AIR combination valve to be checked.

• Illustration shows the engine from the rear.

• Left AIR combination valve is shown in the illustration.

- Remove the noise insulation fasteners - 1 - and noise insulation.





- Disconnect the pressure hose - 2 - from the AIR pump motor (V101) and blow into it with light pressure (do not use pressurized air).





• Both AIR combination valves must be closed, it must not be possible to blow through the hose.

- Operate the (VAG 1390).

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

If the relevant AIR combination valve does not open:

- Replace the AIR combination valve, refer to one of the following:

• Left side, refer to => [ Secondary Air Injection (AIR) Combination Valve ] Left Side Components.

• Right side, refer to => [ Secondary Air Injection (AIR) Combination Valve ] Right Side Components.