Supercharger Bypass (SCB) Solenoid
The SCB solenoid is used to control intake manifold vacuum to the vacuum bypass actuator. The PCM transmits an output signal to the SCB solenoid, thereby activating the solenoid to apply stored vacuum from the reservoir to the actuator when an undesirable condition occurs in the engine. Once the engine condition has been corrected, the solenoid is deactivated by the PCM, allowing engine intake manifold vacuum to control the actuator. The SCB solenoid is normally de-energized.