This Cummins 1139 fault code document is a diagnostic troubleshooting PDF for injector solenoid driver cylinder 1 mechanical system faults. It explains the circuit description, fault conditions, INSITE™ checks, rail fuel pressure sensor tests, ECM connector inspections, calibration review, and final fault clearing steps.
Official Cummins 1139 fault code document details
| Brand | Cummins |
| Model coverage | ISB6.7 CM2250; also lists ISC8.3 and ISL9 CM2250, ISX15 CM2250, ISX11.9 CM2250, and QSL9 CM2250 in associated procedures |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs |
| Publication no. | 4022254 for ISB6.7 CM2250 associated procedures |
| Year/Revision | Last Modified: 11-Jun-2010; troubleshooting section Last Modified: 27-Oct-2010 |
| Pages | 13 |
| 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 1139 – Injector Solenoid Driver Cylinder 1 – Mechanical System Not Responding or Out of Adjustment
- 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 fault codes.
- Guided Step 2A – Inspect the rail fuel pressure sensor and connector pins.
- Guided Step 3 – Check the ECM and engine harness.
- Guided Step 4 – Check ECM calibration and clear fault codes.
Applicable truck models
This file is written for Cummins CM2250 engine diagnostics and the file information identifies ISB6.7 CM2250 (2010-12) DTC coverage. The associated procedures table also references the injector, ECM, ECM calibration code, and engine wiring harness procedures for ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, ISX11.9 CM2250, and QSL9 CM2250 applications. For official engine and service information, visit Cummins official website.
Who needs this Cummins 1139 fault code manual
Workshop technicians, fleet mechanics, and diagnostic tool users need this 1139 fault code manual when Fault Code 1139, SPN 651, FMI 7 is active or when injector timing does not match the expected timing. The procedure helps confirm whether the issue points toward injector circuit faults, the rail fuel pressure sensor and circuit, ECM connectors, engine harness damage, ECM calibration, or possible ECM replacement authorization.
The PDF is useful at the bay because it gives guided yes/no decisions for INSITE™ electronic service tool checks, connector pin inspection, jumper-wire circuit response tests, and final validation. The full PDF is available in the DiagTechPro manuals library, free account required to download.
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