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Exhaust Gas RECIRCULATION: Notes
ECM controls EGR system based on engine operating conditions. ECM controls ground circuit for EGR Control (EGRC) solenoid opening and closing EGR valve as necessary. See Fig 1. EGR-VCV or EGRC solenoid remains closed under certain conditions including the following:
- Engine stopped.
- Engine starting.
- Engine idling.
- Low engine coolant temperature.
- Excessively high engine coolant temperature.
- High engine speed.
- Mass airflow sensor malfunction.
Courtesy of NISSAN MOTOR CO., U.S.A.