Maxima V6-2960cc 3.0L DOHC (VE30DE) (1992)
EGR Control Solenoid: Description and Operation
Fig. 145 Vacuum Solenoid
PURPOSE
The Exhaust Gas Recirculation (EGR) Control Solenoid will either allow vacuum to pass to the EGR Valve or vent the vacuum based on signals
from the Engine Control Module (ECM).
OPERATION
If the ECM senses:
^ Low engine coolant temperature
^ Engine cranking
^ Engine speed over 2700 rpm
^ Engine idling
^ Excessively high coolant temperature
^ Mass Air Flow Sensor malfunction
it energizes the EGR Control Solenoid. An energized solenoid will vent the vacuum signal and NOT allow EGR operation.
If the ECM senses any condition other than above, the EGR Solenoid will be de-energized and allow vacuum to pass.