Air Injection Control Valve: Description and Operation

Secondary Air Injection Bypass Solenoid:

The Normally Closed Secondary Air Injection (AIR) Solenoid Assembly consists of two vacuum ports with an atmospheric vent. The solenoid assembly can be with or without control bleed. The outlet port of the solenoid is opened to atmospheric vent and closed to the inlet port when de-energized. When energized, the outlet port is opened to the inlet port and closed to atmospheric vent. The control bleed is provided to prevent contamination entering the solenoid assembly from the intake manifold.