Pinpoint Test Ag : The Mil (Malfunction Indicator Lamp) Is Never Or Always On: Notes
WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Normal Operation and Fault Conditions
See MIL. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .
If the MIL request message is missing or invalid for less than 5 seconds, the IPC defaults the MIL to its last state (on or off) based upon the last known good message received.
If the MIL request message is missing for 5 seconds or longer, the IPC defaults the MIL on.
Possible Sources
- Communication concern
- GWM concern
- PCM concern
- IPC