Mil On Steady: Description
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
The battery voltage is supplied directly to the Malfunction Indicator Light (MIL). The Powertrain Control Module (PCM) turns MIL ON by grounding the MIL control circuit.
Perform the Diagnostic System Check - Engine Controls, when the following conditions are present: