Cummins ISB4.5 CM2150 Fault Code: 111 PID: 629 FMI:12 Engine Control Module Critical Internal Failure – Bad Intelligent Device or Component
Circuit Description
The ECM has internal diagnostics that continuously run and check the internal memory.
Component Location
The ECM mounting location varies depending on engine model and can be mounted either on or off engine.
Conditions for Running the Diagnostics
This diagnostic runs continuously when the keyswitch is in the ON position.
Conditions for Setting the Fault Codes
This fault code is triggered when the internal ECM diagnostics detect a read or write error internal to the module.
Action Taken When the Fault Code is Active
The ECM illuminates the red STOP ENGINE light and/or the malfunction indicator lamp (MIL) immediately when the diagnostic runs and fails.
The engine may not start.
Conditions for Clearing the Fault Code
To validate the repair, start the engine and let it idle for 1 minute.
The ECM will turn off the red STOP ENGINE light immediately after the diagnostic runs and passes.
The ECM will turn off the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and passes.
This fault code and malfunction indicator lamp (MIL) can also be cleared with INSITE™ electronic service tool.
Shop Talk
This fault code can only be caused by an internal ECM problem. Repairs are not possible for the ECM.
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