Cummins M11 code 341 is the Cummins troubleshooting document for the ECM ROM Memory fault (PID S254, FMI 12, SRT 00-606). The ECM is the computer responsible for engine control, diagnostics, and user features, and this procedure covers a fault in the ECM ROM memory reported by the module. It sets a red warning lamp and lists the exact conditions, causes, and step-by-step checks a technician follows.
Official document details
| Brand | Cummins |
|---|---|
| Model coverage | Cummins M11 CELECT electronic engines built 1990 to 1994 |
| System / Group | M11 CELECT (1990-94) |
| Fault identifiers | PID S254, FMI 12, SRT 00-606 |
| Warning lamp | Red |
| Pages | 2 |
| Format | |
| Language | English |
Document table of contents
- Circuit description
- Component location
- Shop Talk
- Step-by-step troubleshooting steps
- Fault code clearing and verification
Trucks covered by Cummins M11 code 341
This procedure applies to Cummins M11 CELECT electronic engines built 1990 to 1994. The procedure carries the Cummins fault identifiers PID S254, FMI 12, SRT 00-606 for reference and repair-time tracking. It is set by an internal ECM failure affecting the ROM memory, and typical effects include the red lamp illuminating and a logged ECM ROM memory fault. For engine specifications and dealer support, see the official Cummins website.
Who needs this Cummins M11 code 341 manual
Heavy-truck technicians, fleet maintenance teams, and workshop owners diagnosing this fault use it to confirm the code before replacing parts. During diagnosis the ECM is bolted to the left side of the engine, and the fault is rechecked after idling one minute before the module is replaced. The step-by-step tree starts by reading active and inactive codes with the diagnostic tool, then inspects the harness and connector pins for bent, corroded, pushed-back, or expanded pins, flushing them with electronic contact cleaner Part Number 3824510 before any component is condemned. Test leads run around the bulkhead are used to isolate a faulty OEM harness, and the code is rechecked and cleared once the repair passes.
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Applies to these truck models
This is the manufacturer document shared across 2 model families. It applies to:
- Cummins DTCs
- Cummins M11 CELECT (1990-94)
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