Secondary Air Injection (Air) Solenoid Valve Checking

Secondary Air Injection (AIR) solenoid valve -N112-, checking
Special tools, workshop equipment, testers, measuring instruments and auxiliary items required.





^ V.A.G. 1390 Hand vacuum pump

Check condition
^ Not DTCs must be stored in DTC memory.
^ Carry out Output Diagnosis Test Mode (DTM).
^ Vacuum pipes and hose connections free of leaks.
^ Vacuum pipes not blocked/kinked.

Test sequence





- Pull vacuum hose -1- off secondary air intake valve -2- (N112).
- Connect hand vacuum pump V.A.G. 1390 to vacuum hose -1-.

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





- Detach pressure hose -3- from secondary air pump motor and blow in lightly -arrow- combi-valve must be closed.

Note:
To release, press together the buttons on the hose coupling.

- operate hand vacuum pump. Combi-valve must open.
If combi-valve does not open:
- Replace the combi valve.