Exhaust System, Emission Controls

Secondary Air Injection Solenoid Valve, Checking

Special tools, testers and auxiliary items required

• Connector test set (VAG 1594C)

• Assisting hose, e.g. coolant hose

Test Sequence

• Do not use compressed air during the following check!

- Remove the engine cover with air filter. Refer to --> [ Engine Cover with Air Filter ] .

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





- Disconnect the electrical connector - 4 -.

- Slide the assisting hose - 1 -, e.g. 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 the connector - 5 - with adapter cables from the (VAG 1594C) to the battery positive (+) and negative (-) terminals.

- 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.