Combination Valve, Checking

Combination Valve, Checking

The following procedure is used to diagnose the Left secondary air combination valve and the right secondary air combination valve.

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.