Cummins X12 CM2350 X119B (2018 & Newer) Fault Code: 5874 PID: SPN: 630 FMI: 11/11 Engine Control Module Calibration Memory (ROM) Corruption – Root Cause Not Known

Lamp:
Amber

Reason:
Invalid switch configuration adjustable parameter setting have been detected by the Engine Control Module (ECM).

Effect:
Various optional switch inputs to the ECM may not operate correctly.

Circuit Description:
The Original Equipment Manufacturer (OEM) wiring harness connects multiple outputs or switched inputs to the ECM which can be enabled or disabled using recommended diagnostic tool or equivalent, such as such as the accelerator interlock/engine torque limit switch or the clutch/engine protection override switch. Many of the outputs and switched inputs share a common wire on the OEM wiring harness.

Component Location:
Not applicable

Conditions for Running the Diagnostic:
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 features which share a common input or output to the ECM were simultaneously enabled.

Action Taken When the Fault Code is Active:
The ECM illuminates the amber check engine lamp immediately when the diagnostic runs and fails.

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 the recommended diagnostic tool or equivalent will change to inactive immediately after the diagnostic runs and passes.
3. The ECM will turn off the amber check engine lamp immediately after the diagnostic runs and passes.
4. The “reset all faults” command in the recommended diagnostic tool or equivalent can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications

Shop Talk:
Many of the outputs and switched inputs share a common wire on the OEM wiring harness. If two features that share a common OEM wire are enabled simultaneously in the ECM, this fault code will be logged. To disable the fault code, disable one of the features on the shared OEM wire. For example, if the accelerator interlock switch and powertrain protection torque limit switch are both enabled in the ECM, either disable one of the features with the recommended diagnostic tool or equivalent or configure one of the features to be multiplexed using the SAE J1939 multiplexing feature.