Combination Valve, Checking - I

Combi-valve, Checking

Special tools, testers and auxiliary items required





- Hand vacuum pump V.A.G 1390

Requirements
- No DTCs stored in Diagnostic Trouble Code (DTC) memory.
- Output Diagnostic Test Mode (DTM) performed.
- Vacuum lines and hose connections free of leaks
- Vacuum lines not blocked/kinked

Work sequence
- Remove engine cover.






- Pull vacuum hose -1- off Secondary Air Injection (AIR) solenoid valve -N112- -2 -.
- Connect hand vacuum pump V.A.G 1390 to vacuum hose -1 -.

NOTE: Do not use compressed air during the following check.

- Disconnect pressure hose from secondary air pump motor by pressing corrugated area of ring together.
- Blow lightly into pressure hose -arrow -.
- Combi-valve must be closed
- Operate hand vacuum pump.
- Combi-valve must open

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