EGR Control Solenoid: Testing and Inspection

1. Open the control box lid and disconnect the wire harness from the control box.
2. Disconnect the lower vacuum hose of the Exhaust Gas Recirculation (EGR) control solenoid valve (between the EGR control solenoid valve and the air chamber), from the air chamber.






3. Apply vacuum to the hose. It should not hold vacuum.
^ If it holds vacuum, replace the EGR control solenoid valve and re-test.






4. Connect the positive terminal of a 12V battery to the Black/Yellow terminal of the control box connector and the negative terminal to the Red terminal.
5. Apply vacuum to the hose. It should hold vacuum.
^ If it does not hold vacuum, replace the EGR control solenoid valve and re-test.