Exhaust Gas RECIRCULATION System (Optima & MAGENTIS (CANADIAN) 2.4L)
NOTE:
For component identification and location, see Fig 1 and Fig 2
.
- Exhaust Gas Recirculation (EGR) system is operated by ECM during coasting. ECM activates EGR solenoid valve allowing intake vacuum to EGR valve. The manifold pressure is measured before and after EGR valve has been activated and the corresponding pressure variation is compared with reference value to detect a EGR system malfunction. If malfunction is detected, go to next step.
- Check all EGR system vacuum hoses, pipe and passage for damage, blockage or restriction between:
- Throttle body to EGR solenoid valve vacuum hose.
- EGR solenoid valve to EGR valve vacuum hose.
- EGR valve to exhaust manifold pipe.
- EGR valve to intake manifold passage.
- If malfunction is found, repair or replace as necessary. If no malfunction is found, go to next step.
- Check EGR valve operation. For EGR valve operation, see EXHAUST GAS RECIRCULATION VALVE . If EGR valve malfunction is found, repair or replace as necessary. If no malfunction is found, go to next step.
- Check EGR solenoid valve operation. For EGR solenoid valve operation, see EXHAUST GAS RECIRCULATION SOLENOID VALVE . If EGR solenoid valve malfunction is found, repair or replace as necessary. If no malfunction is found, go to next step.
- For more EGR system circuit testing procedure, and check other systems related to EGR system. See appropriate SELF-DIAGNOSTICS article.
Courtesy of KIA MOTORS AMERICA, INC.
Courtesy of KIA MOTORS AMERICA, INC.