Circuit Description

The malfunction indicator lamp (MIL) is located on the instrument panel cluster. The MIL will illuminate when there is an emission related failure or the ignition is ON with the engine OFF. Ignition 1 voltage is supplied to the MIL. The engine control module (ECM) turns the MIL ON by grounding the control circuit of the MIL using a low side driver. The ECM monitors the voltage level on the control circuit of the MIL. If the ECM detects an open or short to ground on the control circuit of the MIL, this DTC sets.