Cummins M11 Code 335 is the Cummins M11 CELECT (1990-94) diagnostic sheet for Fault Code 335, a red-lamp ECM RAM memory fault (PID S254, FMI 12). This 2-page PDF, published by TruckFaultCodes.com (Copyright 2017), gives the circuit description, component location and the full troubleshooting chart. It applies to both M11 and N14 CELECT engines that share this fault-code table.
Cummins M11 Code 335 document details
| Brand | Cummins |
| Model coverage | M11 and N14 CELECT (1990-94) |
| System / Group | ECM RAM memory |
| Fault code | 335 |
| PID / SPN / FMI | PID S254, FMI 12 |
| Warning lamp / SRT | RED lamp, SRT 00-606 |
| Pages | 2 |
| File size | 0.2 MB |
| Format / Language | PDF, English |
Document table of contents
- Circuit description
- Component location
- Shop talk
- Troubleshooting steps
Applicable truck models
This sheet covers Cummins M11 CELECT and N14 CELECT (1990-94) engines used in Class 8 highway tractors and vocational trucks of that era. The ECM is bolted to the left side of the engine. Confirm the engine dataplate and calibration against your service data on the Cummins official support site before ordering parts.
The electronic control module (ECM) is the computer responsible for engine control, diagnostics, and driver features, and it is bolted to the left side of the engine. The extract names an internal ECM failure as the likely cause of this ECM RAM memory fault. The troubleshooting steps cycle the key switch off for five seconds, idle the engine for at least one minute to check whether the code stays inactive, verify a replacement ECM, and finally clear the inactive fault codes with the diagnostic tool.
Who needs this Cummins M11 Code 335 manual
Heavy-duty technicians and workshop owners chasing a stored red-lamp Cummins fault code on an M11 CELECT engine use this ECM RAM memory sheet to follow the factory ECM memory checks instead of guessing. Keep it beside your INSITE or generic diagnostic tool when confirming the repair and clearing the inactive counts.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download it.
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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