Exhaust Gas RECIRCULATION: Notes

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 Nissan Xterra, 2003 Nissan Sentra, 2003 Nissan Pathfinder, 2003 Nissan Murano, and 2003 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.

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

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