SECONDARY AIR INJECTION (AIR) SOLENOID VALVE CONSTRUCTION/OPERATION


BHE011618740T02

• Mainly consists of a coil, spring, plunger, and filter.

When Energized
• The solenoid coil becomes an electromagnet and pulls in the plunger. This opens an airflow path between ports A and B, applying intake manifold negative pressure to the actuator of the AIR control valve.
When Not Energized
• The path of intake manifold negative pressure is closed, and the path between B and C is opened, causing the actuator of the AIR control valve to be open to the atmosphere.

1
When energized
2
When not energized
3
Coil
4
Plunger
5
Spring
6
Flow of intake manifold negative pressure
7
AIR solenoid valve
8
PCM