Circuit Description

PCM monitors EGR valve pintle position input to ensure that valve responds properly to commands from PCM. The EGR (linear) valve is controlled by using an ignition positive driver and ground circuit within the PCM. The driver has the ability to detect an electrical malfunction in the ignition positive or ground circuit, then signal the PCM to set the DTC.

DTC will set when PCM detects an electrical malfunction in the control circuit to EGR valve and conditions is present for more than 20 seconds.