SECONDARY AIR INJECTION (AIR) SOLENOID VALVE CONSTRUCTION/OPERATION [13B-MSP]
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• Mainly consists of a coil, spring, plunger, and filter.
When Energized
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• 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
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• 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.
