Air Injection Control Valve: Description and Operation

Non-Return (One Way) Valves:



Location: On the front of the engine are the two Non-Return Valves. The Non-Return valves serve the following functions.

- When activated by a controlled vacuum source the valves open and allow the supplied air from the electric motor pump to inject air into the exhaust manifolds.
- In the event of an engine backfire they will check the back pressure from damaging the pump, hoses or secondary air solenoid vacuum valve.