Combination Valve, Checking for Function and Leaks

Combination Valve, Checking for Function and Leaks

Special tools, testers and auxiliary items required

• Hand Vacuum Pump (VAS 6213)

Test Conditions

• Vacuum lines and hose connections free of leaks.

• Vacuum lines not plugged.

Test Sequence

- Remove rear engine cover - arrows -.






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






• Left combination valve is shown in illustration.

- Connect (VAS 6213) to the vacuum hose of the combination valve to be checked.

- Loosen quick-release fasteners - 1 and 2 - and remove front noise insulation.






- Disconnect pressure hose - arrow - at Secondary Air Injection (AIR) pump motor (V101).






- 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 the hand vacuum pump.

• The relevant combination valve must open, it must be possible to blow through

If relevant combination valve does not open:

- Replace combi-valve. Refer to => [ Left Combination Valve for Secondary Air Injection (AIR) ] Left Combination Valve for Secondary Air Injection (AIR) and => [ Right Combination Valve for Secondary Air Injection (AIR) ] Right Combination Valve for Secondary Air Injection (AIR).