California Emissions

Solenoid Trio:

Engine controller controls vacuum to EGR transducer through solenoid by applying or removing solenoid ground.

^ ENERGIZED: no vacuum to EGR transducer.

^ Always ENERGIZED during warm-up, idle, wide open throttle, and rapid deceleration/acceleration.

NOTE: Since vacuum admitted when solenoid deactivated, driveability problems will occur if solenoid is disconnected.

On California vehicles engine controller periodically tests EGR system operation. If a fault is found, a fault code will be set and CHECK ENGINE light will be illuminated, indicating vehicle service required.