This document is a Cummins Code 111 DTCs troubleshooting manual for ECM critical internal failure on CM2250 engines. It explains the fault description, effects, clearing conditions, associated ECM procedures, calibration checks, and guided diagnostic steps for the 7-page PDF.
Official Cummins Code 111 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; associated CM2250 coverage also lists ISX11.9, ISC8.3 and ISL9, ISX15, GX, QSL9, and QSB6.7. |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs / Engine Control Module |
| Publication no. | 4022254 for ISB6.7 CM2250 in the Associated Procedures table |
| Year/Revision | Last Modified: 11-Jun-2010; troubleshooting section Last Modified: 30-Dec-2010 |
| Pages | 7 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Codes
- FAULT CODE 111 – Engine Control Module Critical Internal Failure – Bad Intelligent Device or Component
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the ECM.
- Guided Step 2 – Check ECM calibration and clear fault codes.
- Guided Step 2B – Disable the fault code.
Applicable truck models
This file is listed for Cummins ISB6.7 CM2250 fault code diagnostics and also references ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, QSL9 CM2250, and QSB6.7 CM2250 in the associated procedure table. The fault data shown identifies PID: S254, SPN: 629, FMI: 12/12, a red lamp, and an Engine Control Module Critical Internal Failure caused by internal ECM read/write errors, memory hardware failures, or internal ECM voltage supply circuits. See the manufacturer at Cummins official website.
Who needs this Cummins Code 111 DTCs manual
Workshop owners, diesel technicians, and fleet mechanics use this manual when a CM2250 engine reports Fault Code 111 and may not start. The procedure is relevant when INSITE™ electronic service tool is available for checking active or inactive status, inactive counts, ECM code and revision number, calibration information, and fault clearing.
The troubleshooting flow states that this diagnostic runs continuously with the keyswitch ON and becomes active when internal ECM diagnostics detect a module read or write error. The document directs the technician to key OFF, wait 5 seconds, start and idle for 1 minute, check whether Fault Code 111 is inactive, review inactive counts, compare ECM calibration revision history, and clear or disable the fault code. It also states that ECM repair is not possible for this condition and that ECM replacement requires authorization when the guided steps call for replacement. Full PDF available in the DiagTechPro manuals library, free account required to download.
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