This Cummins 1117 troubleshooting document is a fault-code diagnostic manual for ECM power supply loss with the ignition on. It explains Fault Code 1117, SPN 627 FMI 2, the affected ECM power supply circuit, fault conditions, repair validation, and guided electrical checks. The file is a 15-page English PDF for workshop use.
Official Cummins 1117 troubleshooting document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; extract also lists ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, QSB6.7 CM2250, QSL9 CM2250, GX CM2250, and other CM2150/CM2220 applications in the associated procedures table. |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; ECM Power Supply Circuit |
| Publication no. | 4022254 for ISB6.7 CM2250 in the associated procedures table |
| Year/Revision | Last Modified: 11-Jun-2010; troubleshooting revision shown as 20-Jan-2011 |
| Pages | 15 |
| File size | 0.4 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check for fault codes.
- Guided Step 2 – Check the batteries and the power connector.
- Guided Step 3 – Check the OEM power harness.
- Guided Step 4 – Check ECM calibration and clear fault codes.
Applicable truck models
This PDF applies to Cummins electronic engines and ECM families identified in the extract, including ISB6.7 CM2250 and the shared Fault Code 1117 procedure references for ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, QSB6.7 CM2250, QSL9 CM2250, and GX CM2250. The procedure concerns a lost or inadequate primary ECM battery supply, including unswitched battery supply, keyswitch input, OEM power harness, ECM battery supply stub, battery voltage during cranking, OEM fuse condition, connector pins, and harness resistance. For manufacturer information, visit Cummins official website.
Who needs this Cummins 1117 troubleshooting manual
Workshop owners, diesel technicians, and fleet mechanics need this Cummins 1117 troubleshooting manual when an engine logs Fault Code 1117 with no lamp, hard starting, engine dying, or inaccurate trip, maintenance monitor, and fault information. It supports structured diagnosis with INSITE™ electronic service tool checks, battery and power-connector inspection, voltage testing, open-circuit checks, resistance checks below 1.0 ohms, keyswitch input inspection, ECM calibration verification, and final fault-code clearing.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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