Secondary Air Injection System Combination Valve, Checking

Secondary Air Injection System Combination Valve, Checking

Special tools, testers and auxiliary items required

• Hand vacuum pump (V.A.G 1390)

Test Conditions

• Vacuum lines and hose connections free of leaks

• Vacuum lines not blocked or kinked

Test Sequence

- Pull vacuum hose from Secondary Air Injection (AIR) solenoid valve (N112) off combination valve - arrow -.





• Do not use compressed air during following check!

- Connect hand vacuum pump (V.A.G 1390) to vacuum hose from combination valve - arrow -.





- Pull off pressure hose to combination valve at coupling - arrow -, push auxiliary hose onto end of pipe and pressurize slightly by blowing into hose. Combination valve must be closed.





- Operate hand vacuum pump. Combination valve must open.

If the combination valve does not open:

Replace combination valve.