Exhaust Gas RECIRCULATION: Notes
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2002 Nissan Xterra, 2002 Nissan Sentra, 2002 Nissan Quest, 2002 Nissan Pathfinder, and 2002 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
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.