Combi-Valve Checking

Combi-Valve, Checking

Special tools, testers and auxiliary items required







- Hand vacuum pump V.A.G 1390

Conditions
- Vacuum lines and hose connections free of leaks
- Vacuum lines not blocked or kinked

Work sequence







- Disconnect vacuum hose of combi-valve to be checked at Y-piece - arrow







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

NOTE: Do not use compressed air during following check.

- Remove sound insulation.







- Disconnect pressure hose - arrow - between Secondary Air Injection (AIR) pump motor and connecting pipe, and blow into it with light pressure. Both combination valves must be closed.
- Operate hand vacuum pump. The respective combi-valve must open.

If the combi-valve does not open:
- Replace respective combi-valve.