Air Injection Control Valve: Testing and Inspection

Combination valve, checking
Special tools and equipment





^ V.A.G 1390 Hand vacuum pump

Checking conditions
^ No code stored in Diagnostic Trouble Code (DTC) memory.

^ Perform Output Diagnostic Test Mode (DTM).

^ Vacuum lines and hose connections free of leaks.
^ Vacuum lines not blocked/kinked.

Checking sequence





- Pull vacuum hose off combination valve (arrow) and connect hand vacuum pump V.A.G 1390.

Note: Do not use compressed air during the following check!





- Remove pressure hose from secondary air injection pump motor and blow into hose lightly.
^ Combination valve must be closed.
- Operate hand vacuum pump.
^ Combination valve must open.
If the combination valve does not open:
- Replace combination valve