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.

Fig 1: Identifying EGR System Components (Frontier 2.4L & Xterra 2.4L)

Courtesy of NISSAN MOTOR CO., U.S.A.