SPN 629 - FMI 12 (Fault Code 111)
SPN629 FMI12
Engine Control Module Critical Internal Failure - Bad Intelligent Device or Component
CODES:
Fault Code: 111
PID(P), SID(S): S254
SPN: 629
FMI: 12/12
Lamp: Red
REASON: 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:
• To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
• The fault code status displayed by the recommended Cummins® electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
• The ECM will turn off the red STOP ENGINE lamp immediately after the diagnostic runs and passes.
• The "Reset All Faults" command in the recommended Cummins® electronic service tool or equivalent can be used to clear active and inactive faults.
Shop Talk:
This fault code can only be caused by an internal ECM problem. Repairs are not possible for the ECM.
Read More:
SPN 612 - FMI 2 (Fault Code 115)
SPN 190 - FMI 10 (Fault Code 121)
Blog.Teknisi
Engine Control Module Critical Internal Failure - Bad Intelligent Device or Component
 |
| Engine Control Module (ECM) |
CODES:
Fault Code: 111
PID(P), SID(S): S254
SPN: 629
FMI: 12/12
Lamp: Red
REASON: 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:
• To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
• The fault code status displayed by the recommended Cummins® electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
• The ECM will turn off the red STOP ENGINE lamp immediately after the diagnostic runs and passes.
• The "Reset All Faults" command in the recommended Cummins® electronic service tool or equivalent can be used to clear active and inactive faults.
Shop Talk:
This fault code can only be caused by an internal ECM problem. Repairs are not possible for the ECM.
Read More:
SPN 612 - FMI 2 (Fault Code 115)
SPN 190 - FMI 10 (Fault Code 121)
Blog.Teknisi
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