Expedition 4WD V8-5.4L VIN 5 (2006)
Air Diverter Solenoid: Description and Operation
SECONDARY AIR INJECTION (AIR) BYPASS SOLENOID
Secondary AIR Bypass Solenoid
The secondary AIR bypass solenoid is used by the PCM to control vacuum to the secondary air injection diverter (AIR diverter) valve. The secondary
AIR bypass solenoid is a normally closed solenoid. The secondary AIR bypass solenoid also has a filtered vent feature to permit vacuum release.
