Emissions Controls

Secondary Air Injection Solenoid Valve, Checking

Special tools, testers and auxiliary items required

• Connector test set (VAG 1594C)

• Assisting hose, for example, coolant hose

Sequence

• Do not use compressed air during the following check!

- Remove the engine cover.

- Disconnect the pressure hose - 2 - from Secondary Air Injection (AIR) solenoid valve (N112) - 3 -. To do so, compress the securing ring.





- Disconnect the harness connector - 4 -.

- Slide the assisting hose - 1 -, for example, coolant hose, into the AIR solenoid valve.

- Blow forcefully into the assisting hose - arrow -.

Valve must be closed.

If air can be blown through the valve with the assisting hose properly sealed:

- Replace the AIR solenoid valve.

If valve is closed:

- Connect terminals on the connector connection - 5 - with adapter cables from (VAG 1594C) to the battery positive (+) and negative (-).

- Blow forcefully into the assisting hose - arrow -.

Valve must be opened.

If no air can be blown through the valve with the assisting hose properly sealed:

- Replace the AIR solenoid valve.