Combination Valve For Secondary Air Injection (AIR), Checking Function and For Proper Seal

Combination Valve For Secondary Air Injection (AIR), Checking Function And For Proper Seal

Special tools, testers and auxiliary items required







- Hand vacuum pump V.A.G 1390

Requirements
- No leaks in vacuum lines or hose connections.
- Vacuum lines not clogged.







Work sequence
- Remove rear engine cover - arrows -.







- Remove cover - 1 - in engine compartment (right side).







- Disengage Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- - 1 - from air guide.
- Remove bolts - arrows -.
- Remove air guide - 2 -.







- Remove air guide hose - arrows -.







- Disconnect vacuum hose - arrow - at combination valve to be tested.

NOTE: Left combination valve is shown in illustration.

- Connect hand vacuum pump V.A.G 1390 to vacuum hose of combination valve to be checked.







- Disconnect hose - arrow - for Secondary Air Injection (AIR) pump at air filter housing, press release buttons to do so.
- Blow with light pressure into pipe (do not use pressurized air).

- Both combination valves must be closed, it must not be possible to blow through hose

- Operate hand vacuum pump.

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

If the respective combination valve does not open:
- Replace combination valve: Left.