Air Diverter Valve: Testing and Inspection

Combination valve, checking
Special tools and equipment





^ VAG1390 hand vacuum pump

Test requirements
^ No DTCs in DTC memory:
^ Output Diagnostic Test Mode (DTM) performed:
^ No leaks in vacuum lines or hose connections
^ Vacuum hoses not clogged or kinked

Test sequence





- Disconnect vacuum hose at combination valve (arrow) and connect VAG1390 vacuum pump.

Note: Do not use pressurized air for the following test!





- Disconnect pressure hose (arrow) at Secondary Air Injection (AIR) pump motor and blow air in with light pressure. Combination valve must close.
- Operate vacuum pump. Valve must open.
If combination valve does not open:
- Replace combination valve