3000GT AWD V6-2972cc 3.0L DOHC Turbo (1991)
EGR Control Solenoid: Description and Operation
EGR Control Solenoid Circuit
The EGR control solenoid valve, located on the firewall is a duty-cycle type solenoid. It has a valve that opens and closes the vacuum source line to
atmosphere many times per second. This allows only a certain amount of ported vacuum to be applied to the EGR valve, thereby controlling the amount
of EGR operation. The ECU opens and closes the negative circuit and the control relay supplies the positive circuit.