Circuit Description

A linear Exhaust Gas Recirculation (EGR) valve is used on this system. Powertrain Control Module (PCM) commands EGR valve to operate when necessary by controlling a ground signal through PCM. This can be monitored on a scan tool by selecting DESIRED EGR POSITION function. Ignition voltage is supplied to EGR valve thorough a fuse. PCM monitors results of its command through a feedback signal. Feedback signal is the actual position of the EGR pintle. This feedback signal can also be monitored on a scan tool by selecting ACTUAL EGR POSITION function. The ACTUAL EGR POSITION should always be near the commanded or DESIRED EGR POSITION.