DTC P1402: EGR Function: Description: Notes

SYSTEM DESCRIPTION 

Fig 1: System Description Chart

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

This system cuts and controls vacuum applied to the EGR valve to suit engine operating conditions. This cut-and-control operation is accomplished through the ECM and the EGRC-solenoid valve. When the ECM detects any of the following conditions, current through the solenoid valve is cut. This causes the vacuum to be cut. The EGR valve remains closed.

• Low engine coolant temperature
• Engine starting
• High-speed engine operation
• Engine idling
• Excessively high engine coolant temperature
• Mass air flow sensor malfunction
  Fig 2: Identifying EGR And Vacuum System

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