SPN 4100 FMI 13 is the Detroit diesel fault code documented in this mcm2 or acm2 software not compatible troubleshooting guide for DD Series (EPA 2007-Current) engines. This 1-page PDF explains the monitored condition, the enabling parameters and the step-by-step checks a technician follows to confirm and repair the code. It is part of the Detroit DD Series diagnostic trouble code (DTC) library and follows the standard monitored-parameter, enabling-conditions and troubleshooting-step layout used across the Detroit fault-code set.
Official document details
| Brand | Detroit (Detroit Diesel) |
|---|---|
| Model coverage | DD Series (EPA 2007-Current); cross-referenced for Series 60 (DDEC VI – EPA 2007) |
| System / group | DD Series (EPA 2007-Current) / DTCs |
| Fault code | FMI 13 under SPN 4100 — MCM2 or ACM2 Software Not Compatible |
| Emissions level | EPA10 |
| Pages | 1 |
| File size | 0.2 MB |
| Format | |
| Language | English |
SPN 4100 FMI 13 troubleshooting steps
- The fault indicates the vehicle contains incompatible Motor Control Module (MCM2) or Aftertreatment Control Module (ACM2) software versions.
- Clear the fault with the diagnostic tool.
- If the fault becomes active again, the MCM2 and ACM2 software must be reprogrammed to the correct compatible level.
- If the fault does not become active after clearing, release the vehicle.
Applicable truck models and engines
This document applies to Detroit DD Series (EPA 2007-Current) engines and covers the MCM2 and ACM2 software-compatibility check. The procedure is published in Detroit Power Service Literature and drawn from the Detroit diesel fault-code set; always confirm the latest revision through the official Detroit engine support site.
Who needs this SPN 4100 FMI 13 manual
Fleet technicians and workshop owners use this guide to confirm a software-version mismatch between the engine and aftertreatment controllers rather than a hardware fault. Reading the full procedure before touching the harness keeps the diagnosis on the documented path and avoids replacing good parts.
The full PDF is available in the DiagTechPro manuals library, where a free account is required to download.
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