Combination Valve, Checking

Combination Valve, Checking

Special tools, testers and auxiliary items required

• Hand vacuum pump

Test conditions

• Hose connections properly sealed.

Work sequence

- Remove the engine compartment trim.





- Remove the engine cover - 2 -.

- Remove the air filter housing bolts - arrows -.

- Remove the air guide hoses - 1 - and - 6 - from the air filter housing.





- Disconnect the mass air flow (MAF) sensor (G70) - 5 - and the mass air flow (MAF) sensor 2 (G246) - 3 - electrical connectors.

- Loosen the hose clamps - 2 - and - 4 - and remove the air filter housing.

• Left secondary air combination valve shown. The right secondary air combination valve is similar.

- Remove the vacuum hose - 3 - from secondary air injection (AIR) combination valve.





- Press the release buttons in and remove the secondary air hose - 4 -.

- Connect a hand vacuum pump on vacuum connection - 1 - of the secondary air combination valve to be tested.





- Connect a suitable assisting hose to secondary air combination valve - 2 -.

- Blow into assisting hose using light pressure (do not use pressurized air).

The secondary air combination valve must remain closed preventing air from passing through.

- Operate the hand vacuum pump to create a vacuum

The secondary air combination valve must open allowing air to pass through.

If the secondary air combination valve does not open and close, or is stuck:

- Replace the faulty secondary air combination valve.