Combi-valve, checking

Special tools, testers and auxiliary items required

Fig 1: Hand Vacuum Pump V.A.G 1390

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• Hand vacuum pump V.A.G 1390

Test conditions 

• There must be no malfunctions stored in DTC memory
• Output diagnostic test performed
• Vacuum lines and hose connections free of leaks
• Vacuum lines not blocked or kinked

Test sequence 

Fig 2: Connecting Hand Vacuum Pump V.A.G 1390 To Vacuum Hose

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• Remove vacuum hose - 1  - on Secondary Air Injection (AIR) Solenoid Valve N112 - 2  -.
• Connect Hand Vacuum Pump V.A.G 1390 to vacuum hose - 1  -.

Fig 3: Connecting Hand Vacuum Pump V.A.G 1390 To Vacuum Hose

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• Disconnect pressure hose - 3  - at Secondary Air Injection (AIR) pump motor V101 and blow air in with light pressure - arrow  -. Combination valve must be closed.

• Operate Hand vacuum pump V.A.G 1390. Valve must open.

If combi-valve does not open:

• Replace combination valve.