EGR Control Solenoid Valve
There are 2 different EGR control solenoids used on turbocharged and non-turbocharged engines.
The turbocharged engine uses a dual type EGR control solenoid. One is a vacuum valve which supplies vacuum to the EGR valve when energized, and the second is a vent valve which vents the EGR valve vacuum to atmosphere when de-energized. Both solenoid valves receive variable duty cycle signals from the ECA according to EGR requirements.
The non-turbocharged engine uses a single EGR control solenoid. The solenoid supplies vacuum to the EGR valve when de-energized and vents vacuum through its air filter when energized. It also receives a signal from the ECA according to EGR requirements. Both turbocharged and non-turbocharged EGR solenoid valves are mounted on the firewall.