PR25DD engine

WARNING: This page is about a different variant/trim than selected.

SYSTEM DIAGRAM

Courtesy of NISSAN NORTH AMERICA, INC.

Component parts	Function
Crankshaft position sensor	Crankshaft Position Sensor
EGR volume control valve	EGR Volume Control Valve
Intake air temperature sensor	Mass Air Flow Sensor (With Intake Air Temperature Sensor)
Engine coolant temperature sensor	Engine Coolant Temperature Sensor
Accelerator pedal position sensor	Accelerator Pedal Position Sensor
Battery	ECM receives the battery voltage signal.
ECM	ECM
EGR control valve	EGR Volume Control Valve

SYSTEM DESCRIPTION

Courtesy of NISSAN NORTH AMERICA, INC.

EGR system decreases oxygen density in intake air by recirculating a part of exhaust gas to intake system, and decreases recirculating exhaust gas temperature by water cooling type cooler. This is to reduce combustion temperature inside of cylinder so that control generating NOx and knocking. Also this function is for coexistence of driveability and the exhaust performance, and fuel economy.

EGR is deactivated under the following conditions to enhance driveability:

Engine starting
Engine at idle
Low engine coolant temperature
High engine coolant temperature
High engine speed
Low intake air temperature
Low battery voltage