Pulsair 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






- Remove engine cover -1-. To do so, remove 3 bolts (arrows).
- Disconnect vacuum hose from Secondary Air Injection (AIR) solenoid valve (N112).






- Connect VAG1390 hand vacuum pump at vacuum hose (arrow) to combination valve.

Note:

- Do not use pressurized air for the following test!






- Remove intake hose to Secondary Air Injection (AIR) pump motor at upper air filter housing (arrow) and blow into it with light pressure. Combination valve must close.
- Operate vacuum pump. Combination valve must open.

If combination valve does not open:

- Replace Combination valve.