Cummins ISM code 111 is the DiagTechPro reference page for this Cummins diagnostic fault code 111 document, a 2-page PDF sourced from TruckFaultCodes.com (Copyright 2017) that covers the electronic control module microprocessor fault. The ECM is a computer that is responsible for engine control, diagnostics, and user features. When the condition is detected the ECM logs the fault and turns on the red warning lamp to alert the driver and technician.
Cummins ISM code 111 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISM CM570 (1999-02) / DTCs; ISX CM570 (1999-02) / DTCs; Signature CM570 (1999-02) / DTCs |
| System / Group | ISM CM570 (1999-02) / DTCs |
| Fault identifier | Code 111 (PID S254, SPN 629, FMI 12) |
| Warning lamp | Red |
| Source | TruckFaultCodes.com |
| Year / Revision | Copyright 2017 |
| Pages | 2 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Circuit Description
- Component Location
- Shop Talk
- Troubleshooting Steps
- Repair verification and clearing fault codes
Applicable truck models
This document applies to Cummins ISM CM570 (1999-02) / DTCs; ISX CM570 (1999-02) / DTCs; Signature CM570 (1999-02) / DTCs electronic engines used in on-highway and vocational trucks. The ECM is bolted to the intake side of the engine between the air horn and the front of the engine. The troubleshooting section walks through connector and pin inspection, engine-harness resistance measurements and pin-to-pin continuity checks, and ends with a road test that confirms the code is inactive and all fault codes are cleared. Because the same procedure isolates the sensor, the harness and the ECM in turn, it prevents replacing parts that are still good. Verify engine calibration and coverage against the official Cummins engine support site before ordering parts.
Who needs this Cummins ISM code 111 manual
Any mechanic or workshop owner diagnosing ISM code 111 needs this PDF to follow the factory circuit and resistance checks in the correct order. This fault code can only be caused by an internal ECM problem. Repairs are not possible for the ECM.
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