PACCAR PX-9 CM2350 (2013-17) Fault Code:111 PID:SID 254 SPN:629 FMI:12 Engine Control Module Critical Internal Failure -Bad Intelligent Device or Component
Reason:
Engine Control Module Critical Internal Failure -Bad Intelligent Device or Component. Error internal to the engine control module (ECM) related to memory hardware malfunctions or internal ECM voltage supply circuits.
Effect:
Engine may not start or may be difficult to start.
Circuit Description:
The ECM has internal diagnostics that continuously run and check the internal memory.
Component Location:
The Engine Control Module (ECM) is mounted on the intake manifold side of the engine.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.
Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected a read or write error internal to the ECM.
Action Taken When the Fault Code is Active:
The ECM illuminates the red STOP ENGINE lamp 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:
1) To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
2) The fault code status displayed by your diagnostic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
3) The ECM will turn off the red STOP ENGINE lamp immediately after the diagnostic runs and passes.
4) For On-Board Diagnostics (OBD) engines, the ECM will extinguish the Malfunction Indicator Lamp (MIL) after three consecutive trips where the diagnostic runs and passes.
5) The Reset All Faults command in your diagnostic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.
Shop Talk:
This fault code can only be caused by an internal ECM problem. Repairs are not possible for the ECM.
Possible Causes:
1) Bad ECM
2) ECM needs a calibration update.
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