LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 1983 >> Sentra Base, 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> EGR System - Diesel >> Operation
April 5, 2026: LEMON Manuals is launched! Read the announcement.

EGR System - Diesel: Operation

The EGR flow is determined by position of throttle and EGR valves. Information is signaled to EGR control unit by potentiometer (engine load), revolution sensor (engine RPM) and water temperature sensor (engine coolant).

The control unit signals the solenoid valves to open or close, determining vacuum levels at EGR control valve and throttle diaphragm. To assure good driveability and safe operation, the EGR system is deactivated when coolant temperature is either low or extremely high.

Fig 1: EGR Control System (Maxima - Diesel)
G41168
EGR SYSTEM OPERATION (MAXIMA)

Throttle Valve Position EGR Valve Position EGR Flow Rate
Closed Open High
Open Open Low
Open Closed Zero
EGR SYSTEM OPERATION (SENTRA)

Throttle Valve Position EGR Valve Position EGR Flow Rate
Low Altitude
Closed Open High
Open Open Low
Open Closed Zero
High Altitude
Open Open Low
Open Open Low
Open Closed Zero